JP2021069669A - Artificial tooth and fitting attachment therefor - Google Patents

Abstract

To provide an artificial tooth and a fitting attachment therefor that are inexpensive and can be simply and securely fitted to an anodontia part by effectively using a minimum implant structure or a remaining root without using an implant.SOLUTION: There are provided an artificial tooth and a fitting attachment therefor including a groove part at which a retaining part in a recess-added protrusion shape for inhibiting a projection part from being detached from the groove part in a state of the artificial tooth being mounted is provided on an artificial tooth plate side end of the groove part. The groove part has a tooth tip side end closed by a part of the artificial tooth. In a state in which occlusion is performed after a separation end artificial tooth is fitted to an abutment tooth and an artificial tooth plate receiving occlusal force is pressed on a gingiva and depressed, the projection part is inhibited from coming into contact with the tooth tip side end and both are separated with a fixed space therebetween. In addition, the artificial tooth comprises an elastic engagement part whose elastic force is used for retaining the projection part in a groove formed on a groove-added engagement part when the artificial tooth is mounted.SELECTED DRAWING: Figure 1

Description

In the present invention, a denture that can be attached to the implant or the residual root portion without applying an excessive force by using the implant or the residual root portion as a denture abutment portion (hereinafter, appropriately simply referred to as a “denture abutment portion”) and a denture thereof. Regarding mounting attachments.

With the advent of an aging society and technological advances in recent years, implants are increasingly being used instead of dentures as a countermeasure for missing teeth. Also, inventions relating to implants are known (see, for example, Patent Document 1). Further, inventions related to implants and inventions of dentures using the magnetic force of a magnet without using an implant have also been taken (see, for example, Patent Documents 2 and 3).

Japanese Unexamined Patent Publication No. 07-07788 Japanese Unexamined Patent Publication No. 07-07788 Japanese Unexamined Patent Publication No. 07-07788

However, if there are multiple missing teeth, it would be quite expensive to implant all of them. In addition, some elderly people have many missing teeth to which a sturdy implant as described in Patent Document 1 cannot be applied due to atrophy of the mandible or the like.

Further, the technique described in Patent Document 2 is a technique for attaching a denture regardless of the implant placement direction, and is inappropriately applied to a missing tooth in which atrophy of the mandible is observed as described above.

The technique described in Patent Document 3 is a configuration of an attachment using the attractive force of a permanent magnet for fixing the denture, and is merely for attaching or detaching the denture to or from the root of the tooth, and for each missing tooth. Since this configuration must be applied, some dentures may come off and fall off.

Due to the above circumstances, an inexpensive denture that can replace one or more missing teeth around it with a denture and its attachment while effectively utilizing the structure of the implant and the residual root that does not need to be an implant. The structure of the attachment is required.

An object of the present invention is to provide an inexpensive denture and its attachment attachment that can be easily and reliably attached to a missing tooth by utilizing the minimum implant structure or by effectively utilizing the residual root portion without using an implant. To do.

In order to solve the above-mentioned problems, the denture according to claim 1 of the present invention and its attachment attachment are provided.
A denture that attaches a free end denture to a single abutment tooth and its attachment attachment.
The attachment has a metal crown to be attached to the one abutment tooth and a protrusion made of a magnetic material provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved.
The protruding portion has a substantially spherical shape or a substantially hemispherical shape.
The denture is composed of a free end denture, and the free end denture is adjacent to at least one denture body attached adjacent to the abutment tooth, a denture base supporting the denture body, and the abutment tooth. With respect to the grooved engaging portion arranged on the end side and the grooved engaging portion when viewed in the mounted state of the denture at a position inside the free end denture and adjacent to the grooved engaging portion. It has a magnet located on the opposite side of the abutment tooth,
The groove formed in the grooved engaging portion extends in the direction connecting the denture base and the denture body.
A groove is formed in the grooved engaging portion in the direction from the denture base to the denture body.
The protruding portion protrudes from the side surface of the metal crown in a direction in which it can be engaged in the groove portion of the grooved engaging portion when viewed with the denture attached.
When the free end denture is attached to the abutment tooth, the protruding portion engages with the groove portion of the grooved engaging portion, so that the free end denture is coupled to the abutment tooth and at the same time. When the denture base of the free end denture comes into contact with the gingiva, the free end denture is attached to the abutment tooth, and the free end denture is attached to the abutment tooth.
The magnet exerts a magnetic tensile force on the protruding portion made of the magnetic material to prevent the free end denture from separating from the abutment tooth.
In a state where the free end denture is attached to the abutment tooth, the protruding portion can move along the groove while applying a magnetic tensile force to the protruding portion, and the protruding portion is the groove portion. The extending direction of the free end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth while staying at a predetermined position in the extending direction.
The groove is provided with a recessed protrusion-shaped retaining portion at the end of the groove on the denture base side to prevent the protrusion from coming off the groove when the denture is attached, and the tooth tip side of the groove. The end is closed by a part of the denture, and the free end denture is attached to the abutment tooth to occlude, and the denture base is pressed against the gingiva and sank by receiving an occlusal force. In the above, the protruding portion does not hit the end on the denture side, and the two are separated by a certain space.
Further, it is characterized in that the protruding portion stays in the groove formed in the grooved engaging portion while the denture is mounted by utilizing the elastic force of the elastic engaging portion provided on the denture. There is.

Further, the denture according to claim 2 of the present invention and its attachment attachment
A denture that attaches a free end denture to a single abutment tooth and its attachment attachment.
The attachment has a metal crown to be attached to the one abutment tooth and a protrusion made of a magnetic material provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved.
The protruding portion has a substantially spherical shape or a substantially hemispherical shape.
The denture is composed of a free end denture, and the free end denture is adjacent to at least one denture body attached adjacent to the abutment tooth, a denture base supporting the denture body, and the abutment tooth. With respect to the grooved engaging portion arranged on the end side and the grooved engaging portion when viewed in the mounted state of the denture at a position inside the free end denture and adjacent to the grooved engaging portion. It has a magnet located on the opposite side of the abutment tooth,
The groove formed in the grooved engaging portion extends in the direction connecting the denture base and the denture body.
A groove is formed in the grooved engaging portion in the direction from the denture base to the denture body.
The protruding portion protrudes from the side surface of the metal crown in a direction in which it can be engaged in the groove portion of the grooved engaging portion when viewed with the denture attached.
When the free end denture is attached to the abutment tooth, the protruding portion engages with the groove portion of the grooved engaging portion, so that the free end denture is coupled to the abutment tooth and at the same time. When the denture base of the free end denture comes into contact with the gingiva, the free end denture is attached to the abutment tooth, and the free end denture is attached to the abutment tooth.
The magnet exerts a magnetic tensile force on the protruding portion made of the magnetic material to prevent the free end denture from separating from the abutment tooth.
In a state where the free end denture is attached to the abutment tooth, the protruding portion can move along the groove while applying a magnetic tensile force to the protruding portion, and the protruding portion is the groove portion. The extending direction of the free end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth while staying at a predetermined position in the extending direction.
The groove is provided with a recessed protrusion-shaped retaining portion at the end of the groove on the denture base side to prevent the protrusion from coming off the groove when the denture is attached, and the tooth tip side of the groove. The end portion is open above the denture, and the free end denture is attached to the abutment tooth to occlude, and the denture base is pressed against the gingiva and sinks under the occlusal force. The protruding portion does not hit the end on the denture side, and the two are separated by a certain space.
Further, it is characterized in that the protruding portion stays in the groove formed in the grooved engaging portion while the denture is mounted by utilizing the elastic force of the elastic engaging portion provided on the denture. There is.

Further, the denture and its attachment attachment according to claim 3 of the present invention are the denture and its attachment attachment according to claim 1 or 2.
An implant is used as the abutment tooth instead of a natural tooth, and the metal crown is attached to the implant.

Further, the metal crown according to claim 4 of the present invention
The metal crown according to any one of claims 1 to 3, which can be used only for the denture according to any one of claims 1 to 3 and its attachment attachment.

Further, the free end denture according to claim 5 of the present invention
The free end denture according to any one of claims 1 to 3, which can be used only for the denture according to any one of claims 1 to 3 and its attachment.

Further, the denture and its attachment attachment according to claim 6 of the present invention
In free-end dentures and their attachments, one end of which can be attached to a single abutment tooth
A metal crown that forms the abutment tooth by covering the remaining teeth, and the free end denture is viewed from a predetermined position on the peripheral surface of the metal crown when the free end denture is attached to the abutment tooth. Consists of a metal crown having a protruding portion on the end side facing the abutment tooth, and a free end denture having one end attached to the protruding portion of the metal crown and removable.
The protruding portion of the metal crown has a substantially spherical body made of a magnetic material and a fixing portion forming a connecting portion between the substantially spherical body and the metal crown.
The fixing portion comprises an embedded fixing portion arranged in the metal crown and a connecting fixing portion in which one end is connected to the embedded fixing portion and exposed from the surface of the metal crown to connect the substantially spherical body.
The thickness of the connection fixing portion is smaller than the outer diameter of the substantially spherical body, and the direction of the central axis of the connection fixing portion is the metal when the free end denture is attached to the abutment tooth. It extends from the lateral outer peripheral surface of the crown toward one end side of the free end denture facing the metal crown.
On one end side of the free-end denture facing the metal crown, a housing recess for accommodating the substantially spherical body so as to be able to be taken in and out is formed, and at the same time, in the vicinity of the housing recess and from the housing recess. It has a magnet provided inside the free end denture so as to be located on the other end side of the free end denture.
When the free end denture is attached to the abutment tooth, the substantially sphere is formed in the accommodation recess while the outer peripheral surface of the substantially sphere engages with the inner peripheral surface of the accommodation recess. By staying with a magnetic tensile force, the free end denture can be attached to the abutment tooth with the bottom of the denture base of the free end denture in contact with the surface of the gingiva.
When the end opposite to one end of the free end denture is the other end, the recess provided at one end of the free end denture is used as a fulcrum according to the occlusal force acting on the free end denture at the time of occlusion. With the other end as the free end, the free end denture itself moves within the range where the occlusal force acts, and at the time of the occlusal, the free end denture moves in the direction in which the occlusal force acts. The compression repulsive force from the gingiva generated by pressing the bottom portion against the gingiva through the denture base does not cause the protruding portion or the accommodating recess to generate mechanical stress exceeding the allowable range of strength. It is possible to occlude while absorbing the occlusal force,
Further, it is characterized in that the protruding portion stays in the accommodating recess while the denture is mounted by utilizing the elastic force of the elastic engaging portion provided on the denture.

Further, the denture and its attachment attachment according to claim 7 of the present invention are the denture and its attachment attachment according to claim 6.
It is characterized in that a substantially hemispherical body is provided on the protrusion instead of the substantially spherical body.

Further, the denture and its attachment attachment according to claim 8 of the present invention are the free end denture and its attachment attachment according to claim 6 or 7.
Instead of covering the crown with the metal crown to form an abutment tooth, an implant is used to form the abutment tooth together with the metal crown.

Further, the metal crown according to claim 9 of the present invention
The metal crown according to any one of claims 6 to 8, which can be used only for the free end denture according to any one of claims 6 to 8 and its attachment.

Further, the free end denture according to claim 10 of the present invention
The free end denture according to any one of claims 6 to 8, which can be used only for the free end denture according to any one of claims 6 to 8 and its attachment.

According to the present invention, there is provided an inexpensive denture and its attachment that can be easily and reliably attached to a missing tooth by utilizing the minimum implant structure or by effectively utilizing the residual root portion without using an implant. be able to.

It is a side view which shows the structure of the denture and its attachment attachment which concerns on 1st related embodiment of this invention in a partial cross section. It is a top view which shows the denture shown in FIG. 1 and its attachment attachment in a partial cross section. It is a partially enlarged view of the denture shown in FIG. 1 and its attachment attachment. It is a perspective view which shows a part of the attachment attachment shown in FIG. 1 in an enlarged manner. It is a side view corresponding to FIG. 1 for demonstrating the operation of the 1st related embodiment. It is a figure corresponding to FIG. 3 which shows the form which changed a part of the denture shown in FIG. It is explanatory drawing which shows an example of the attachment position of the denture and its attachment attachment which concerns on 1st related embodiment shown in FIGS. 1 to 4. FIG. It is a side view corresponding to FIG. 1 which shows the modification of the 1st related embodiment. It is a top view corresponding to FIG. 2 which partially shows the modification of the 1st related embodiment. It is a side view which shows the structure of the denture and its attachment attachment which concerns on 2nd related embodiment of this invention in a partial cross section. It is a top view which shows the denture shown in FIG. 10 and its attachment attachment in a partial cross section. It is a partially enlarged view of the denture shown in FIG. 10 and its attachment attachment. It is a side view corresponding to FIG. 10 for explaining the operation of the 2nd related embodiment. It is a figure corresponding to FIG. 12 which shows the form which changed a part of the denture shown in FIG. It is explanatory drawing which shows an example of the attachment position of the denture and its attachment attachment which concerns on 2nd related embodiment shown in FIGS. 10 to 12. It is a side view corresponding to FIG. 10 which shows the modification of the 2nd related embodiment. It is a top view corresponding to FIG. 11 which partially shows the modification of the 2nd related embodiment.

It is explanatory drawing which shows the mounting state of the denture and its attachment attachment which concerns on 3rd Embodiment of this invention. It is explanatory drawing which shows the occlusal state after wearing the denture shown in FIG. It is a figure explaining the adjustment method at the time of attaching the denture and its attachment attachment which concerns on 3rd Embodiment shown in FIG. FIG. 18 is a diagram for sequentially explaining how to engage the magnetic material engaging portion and the denture support portion with which the magnetic material engaging portion in the third embodiment shown in FIG. 18 is engaged, and is a diagram for sequentially explaining the magnetic material engaging portion in the fourth embodiment. It also shows how to engage with the denture support that this engages with. It is explanatory drawing corresponding to FIG. 21, the left side shows the side view, and the right side shows a plan view. It is a figure explaining in order the 1st modification in which the way of engaging with the magnetic body engaging part and the denture support part with which it engages in a 3rd Embodiment is different, and is the 1st modification of a 4th Embodiment. The method of engaging the magnetic material engaging portion and the denture support portion with which the magnetic material engaging portion is engaged is also shown. It is explanatory drawing corresponding to FIG. 23, the left side shows the side view, and the right side shows a plan view. It is a figure explaining in order the 2nd modification in which the way of engaging with the magnetic body engaging part and the denture support part with which it engages in a 3rd Embodiment is different, and is the 2nd modification of a 4th Embodiment. The method of engaging the magnetic material engaging portion and the denture support portion with which the magnetic material engaging portion is engaged is also shown. It is explanatory drawing corresponding to FIG. 25, the left side shows the side view, and the right side shows a plan view. It is a figure explaining in order the 3rd modification in which the way of engaging with the magnetic body engaging part and the denture support part with which it engages in a 3rd Embodiment is different, and is the 3rd modification of a 4th Embodiment. The method of engaging the magnetic material engaging portion and the denture support portion with which the magnetic material engaging portion is engaged is also shown. It is explanatory drawing corresponding to FIG. 27, the left side shows the side view, and the right side shows a plan view. It is explanatory drawing which shows the mounting state of the denture and its attachment attachment which concerns on 4th Embodiment of this invention. It is explanatory drawing which shows the occlusal state after wearing the denture shown in FIG. It is a 1st drawing concerning this invention. A crotch type fastener is used as the latch elastic engagement member. Further, the free-end denture is provided with an engaging hole for engaging the protrusion of the abutment tooth on the lower surface of one end of the denture base. This protrusion indicates that the protrusion may be spherical or hemispherical, and may have any shape as long as the upper surface is poor. Further, a wire which is an elastic member is used for the piercing type fastener. 2 is a second drawing relating to the present invention. In the above figure, an elastic body such as a coil spring is provided so that the piercing type engaging member slides in the lateral direction in the drawing. Further, in the figure below, it is shown that a spacer is provided on the protrusion. FIG. 3 is a third drawing relating to the present invention. The above drawing discloses an elastic member formed by a combination of a coil spring and a stopper. Further, in the drawing below, a combination with a coil bullet ball bearing is disclosed. It is a 4th drawing concerning this invention. A shape with a protrusion and a coil spring at the bottom of the magnet is disclosed. FIG. 5 is a fifth drawing relating to the present invention. A method of using a magnet instead of a piercing elastic body is depicted. It is a sixth drawing which concerns on this invention. A movie of the keeper is drawn. FIG. 7 is a seventh drawing relating to the present invention. The movie depicts a member of the latch engagement engaging the neck of the protrusion.

In explaining the present invention, the related invention will be described in advance. This related invention was devised by the inventor and applicant of the present patent application.

The difference between the following related inventions and the present invention of the present application is the structure of the magnetic material provided at one end of the free-end denture and the portion of the magnetic material engaging portion with which the magnetic material engages. Since the inventor of the present patent application has conceived that this difference causes a remarkable special action and effect for the invention of the present patent application, the specific contents of the present invention will be described after the description of the following related inventions. ..

Therefore, since all the configurations of the related invention and the free end denture of the present invention and the attachment thereof other than the portion based on the above-mentioned structural difference are common, the common configuration will be described in the following description of the present invention. The following description of the related invention shall be diverted and changed to this.

Hereinafter, the denture and its attachment attachment according to the present invention will be introduced. As described above, the present invention relates to a mucosal burden type denture. Here, the definition and technical significance of mucosal-bearing dentures will be described.

Some people who need to wear dentures have individual constitutional differences and the periodontal ligament of the abutment tooth is considerably damaged with age, while the periodontal ligament of the abutment tooth is in a healthy state. Some people keep it. Here, in the case of a person whose periodontal ligament of the abutment tooth is considerably crushed and damaged, if the occlusal force acts not only on the denture but also on the abutment tooth when the denture is attached to the abutment tooth and occlused, the tooth root The membrane is compressed by that amount and the periodontal ligament is further damaged. If the periodontal ligament is extremely damaged, the abutment tooth itself cannot withstand the burden of attaching the denture, and the problem arises that the abutment tooth is eventually lost.

In order to prevent the abutment tooth from being damaged for the denture wearer whose root membrane of the abutment tooth has been damaged with age, the occlusal force is applied to the denture base of the denture (free end denture or intermediate denture prosthesis). It is preferable to use a mucous membrane-bearing denture (provided in the present invention) that exerts (bears) the occlusal force by pressing the gingiva and exerting a pressing force that causes the denture itself to sink.

The above reasons will be supplemented with a more objective explanation. Bite force quotient is extremely large, about 3 MPa to about 9 MPa (average 30 kg to 90 kg per ^{1 cm 2} (300 tons to 900 tons per ^{1 m 2)).} Therefore, even if a healthy periodontal ligament can bear the burden, if the periodontal ligament is not healthy due to periodontal disease or the like, the burden becomes excessive and pain occurs at the time of occlusion. Furthermore, there are many cases in which the periodontal ligament is damaged, resulting in tooth extraction.

If you feel pain during such an occlusion, you cannot expect to have a normal diet in your daily life, which will lead to serious problems in terms of quality of life. Therefore, if the periodontal ligament is not healthy, it should be devised so as not to burden the periodontal ligament when the denture is attached. In this case, as the most effective countermeasure, it is a preferable selection means to attach the above-mentioned mucosal burden type denture.

Although each component is also shown in the drawings in the following first and second embodiments and their modified examples, the shapes and dimensions of the components in each drawing are exactly the same. I haven't let you. This is because, of course, all the differences in these shapes and dimensions are included in the scope of the present invention, and therefore, they are intentionally made different for convenience of explanation. Therefore, it should be added that the difference in the shape and dimensional relationship of each component in each drawing does not affect the scope of the present invention at all.

Further, in the description related to each drawing, the vertical direction is defined based on the direction in which the upper side is the artificial tooth (denture body) side of the denture and the lower side is the denture base side. Further, the plan view is a state viewed from the tip side of the denture. In addition, parts that should be hatched in the drawings are omitted as appropriate to facilitate understanding of the explanation.

First, the denture and its attachment attachment according to the first related embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing a structure of a denture and its attachment attachment according to the first related embodiment of the present invention in a partial cross section. Further, FIG. 2 is a plan view showing a partial cross section of the denture shown in FIG. 1 and its attachment. Further, FIG. 3 is a partially enlarged view of the denture shown in FIG. 1 and its attachment. Further, FIG. 4 is an enlarged perspective view showing a part of the mounting attachment shown in FIG. 1.

The denture and its attachment attachment 1 (hereinafter, appropriately simply referred to as “denture and its attachment attachment 1”) according to the first related embodiment of the present invention are a free end denture 10 attached to one abutment tooth 80 and its attachment. It consists of a mounting attachment 20.

The mounting attachment 20 has a metal crown 210 to be attached to one abutment tooth 80, and a protruding portion 220 made of a magnetic material provided at a predetermined position around the metal crown 210 and having at least a part of its peripheral surface curved. ing.

The protruding portion 220 has a substantially spherical shape in the present embodiment. More specifically, as shown in FIG. 3, the protruding portion 220 has a recessed portion below the proximal end side of the spherical body, that is, a portion on the root side of the abutment tooth 80. The tip 136 of the retaining portion 135 extending from the lower end of the grooved engaging portion 130, which will be described later, enters and engages with the lower recessed portion 222. The protruding portion 220 is made of a magnetic material, and for example, an alloy of stainless steel, gold, or platinum, which is excellent in strength, durability, and corrosion resistance, is used.

In the protruding portion 220, the base end portion 221 of the protruding portion 220 is bonded with a third alloy, gripped with a cast metal, or brazed to a part of the peripheral surface of the metal crown 210 at the time of casting, and the peripheral surface of the metal crown 210 is formed. The protruding portion 220 protrudes from the free end prosthesis 10 in the mounting direction.

Then, the magnet 140, which will be described later, exerts a magnetic tensile force on the protruding portion 220 made of a magnetic material to prevent the free end denture 10 from separating from the abutment tooth 80. Further, in the state shown in FIG. 3, the tip 136 of the retaining portion 135 is caught in the lower recessed portion 222 of the protruding portion 220 to assist the free end denture 10 from being separated from the abutment tooth 80. There is.

The free end denture 10 includes at least one denture body 110 (111, 112, 113, ...), A denture base 120 that supports the denture body 110, and a groove arranged at an end adjacent to the abutment tooth 80. It has an engaging portion 130 and a magnet 140 that is housed in a magnet holder 150 and is embedded in a denture body 110 or a denture base 120 and provided on the joint portion side with a free end denture 10.

In the case of the present embodiment, the grooved engaging portion 130 is formed integrally with the magnet holder 150. The grooved engaging portion 130 and the magnet holder 150 are made of, for example, stainless steel, which has excellent durability, strength, and corrosion resistance, and the magnet holder 150 is a denture body 110 and a denture base 120 made of denture resin. It is embedded inside. The grooved engaging portion 130 and the magnet holder 150 do not necessarily have to be integrally formed, and they may be formed separately and firmly bonded to each other.

When the present embodiment has such a configuration, the magnet 140 is not exposed in the mouth of the denture wearer, the material of the magnet 140 makes the taste uncomfortable, and fragments of the magnet 140 are in the mouth. It prevents you from entering.

The grooved engaging portion 130 has a grooved portion 131 extending from the denture base side of the free end denture 10 toward the tip end (upper end of FIGS. 1 and 3) of the denture body 110. Further, at the end of the grooved engaging portion 130 on the denture base side (lower end of FIGS. 1 and 3), the protruding portion 220 is pulled out so as not to come out from the predetermined portion of the grooved engaging portion 130. It is equipped with a stopper 135.

The groove width of the groove portion 131 is a width that does not interfere with each other when the protruding portion 220 is inserted into the groove portion 131 to engage with the groove portion 131. As a result, when the free end denture 10 is attached to the abutment tooth 80, the protruding portion 220 has the attractive force of the magnet 140 provided on the free end denture 10 and, depending on the case, the lower recessed portion 222 and the retaining portion. It is pressed against the groove 131 by the engaging force of 135 with the tip 136.

Then, in a state where the free end denture 10 is attached to the abutment tooth 80, the protruding portion 220 of the metal crown 210 can move along the groove portion 131 of the grooved engaging portion 130 of the free end denture 10. Further, since the protruding portion 220 has a substantially spherical body, the grooved engaging portion 130 has the extending direction of the free end denture 10 in a state where the protruding portion 220 stays at a predetermined position in the extending direction of the groove portion 131. Can be changed within a predetermined angle range with respect to the central axis of the abutment tooth 80.

The amount of displacement of the protruding portion 220 with respect to the extending direction of the groove portion 131 when the free end denture 10 is attached to the abutment tooth 80 is such that when the denture wearer occludes, the denture base 120 of the free end denture 10 is saliva D. Is pushed out to press the denture 800, and the denture itself sinks and the occlusal force from the teeth facing the free end denture 10 and the abutment tooth 80 is changed to the pressing force applied to the denture 800, and the denture force is handled. Is specified in a size that does not adversely affect the root membrane 81 of the abutment tooth 80.

Further, the predetermined angle is defined as an angle within a range that allows the entire lower surface of the denture base 120 to come into contact with the gingiva 800 with saliva (see the dot-shaped portion D shown in FIG. 1).

Further, the retaining portion 135 is attached to the upper surface of the gingiva 800 to which the denture base 120 of the free end denture 10 is attached to the entire bottom surface of the free end denture 10 with saliva interposed therebetween when the free end denture 10 is attached to the abutment tooth 80. On the other hand, they are arranged so as to face each other with a certain space S1 separated from them.

Further, the end portion of the groove portion 131 opposite to the retaining portion 135, that is, the upper end portion of FIGS. 1 and 3, is closed by a part of the denture main body 110.

Based on the above configuration, when the free end denture 10 is attached to the abutment tooth 80, the protruding portion 220 engages with the grooved engaging portion 130, so that the free end denture 10 becomes an abutment. By binding to the tooth 80 and the bottom surface of the denture base 120 of the free end denture 10 is completely adhered to the upper surface of the gingiva 800 via saliva in the mouth (see the portion indicated by the dot D in FIG. 1). The free end denture 10 is firmly attached to the abutment tooth 80 while maintaining a predetermined play.

Further, in a state where the free end denture 10 is attached to the abutment tooth 80, the protruding portion 220 is fitted into the grooved engaging portion 130, and at least a part of the curved portion of the protruding portion 220 (in the present embodiment). The relative position and relative angle of the free end denture 10 with respect to the abutment tooth 80 can be changed within a predetermined range while a considerable portion) stays in the grooved engaging portion 130 by a magnetic pulling force.

When the denture and its attachment attachment 1 according to the first related embodiment of the present invention have the above-described configuration, the following effects can be exhibited. Specifically, the magnet 140 provided on the free end denture 10 firmly pulls the protrusion 220 provided on the metal crown 210 while giving some play to the attachment relationship of the free end denture 10 to the abutment tooth 80. Can be retained. As a result, the occlusal force is applied at the time of occlusal, and the denture base 120 of the free end denture 10 presses the gingiva 800 to push saliva intervening between the denture base 120 and the gingiva 800 to the outside of the denture base 120 and push the denture itself. It is used as a pressing force to sink. As a result, the occlusal force is applied only to the abutment tooth 80, and the periodontal ligament 81 of the abutment tooth 80 can be prevented from being crushed.

FIG. 5 is a side view corresponding to FIG. 1 for explaining the above-mentioned operation. When the tooth is bitten with respect to the state of FIG. 1, the denture base 120 of the free end denture 10 is pressed against the gingiva 800 by the occlusal force, and saliva intervening between the denture base 120 and the gingiva 800 (dot in FIG. 5). The portion (indicated by) is pushed out of the denture base 120, and the portion of the gingiva 800 below the denture base 120 is pushed down and the occlusal force is applied to the abutment tooth 80 to adversely affect the root membrane 81. It can be understood from the drawing that it is prevented.

In a state where the free end denture 10 is attached to the abutment tooth 80 and occluded, and the denture base 120 is pressed against the gingiva, a constant space S2 is formed between the end portion and the protruding portion. By forming such a space, even if the tooth is strongly bitten, the occlusal force is not applied to the periodontal ligament 81 of the abutment tooth 80, and the progress of deterioration of the periodontal ligament 81 can be prevented.

As a result, the denture wearer can be given a comfortable fit and bite, can continue to bite comfortably while chewing food, and can continue to wear the denture and enjoy eating without being stressed. become. As a result, food can be digested properly, and it is possible to contribute to the improvement of physical condition while maintaining health, which is especially important for the elderly.

In addition, there is no extra gap between the abutment tooth 80 and the free end denture 10 during occlusion, and food that cannot be crushed by being caught in such a gap may be swallowed as it is, resulting in indigestion in the gastrointestinal tract. Absent.

As described above, since the grooved engaging portion 130 has the groove portion 131, the protruding portion 220 has a structure in which the protruding portion 220 can freely move within the predetermined range. Further, the extending direction of the free end denture 10 can be reasonably changed within a predetermined angle range with respect to the central axis of the abutment tooth 80. As a result, it is not necessary to apply an excessive force to the connecting portion between the abutment tooth 80 and the free end denture 10 at the time of occlusion. Similarly, it is possible to give a comfortable wearing feeling to the denture wearer, and it is possible to prolong the life of the abutment tooth 80 without applying excessive stress to the abutment tooth 80.

As a result, it is possible to prevent the abutment tooth 80 from being overpowered and damaging the periodontal ligament or crushing the periodontal ligament itself, and to prevent the valuable abutment tooth 80 from being lost. Further, the gingiva 800 is not damaged due to the breakage of the joint portion of the denture, and the problem of accidental ingestion of the damaged portion does not occur.

When attaching the free end denture 10 to the abutment tooth 80, one end of the free end denture 10 is twisted around the extending direction of the free end denture 10 with a fingertip to the protruding portion 220 of the abutment tooth 80. The free end denture 10 is attached to the abutment tooth 80 by pressing the groove 131 provided in the above. On the other hand, when the free end denture 10 is removed from the abutment tooth 80, one end of the free end denture 10 is twisted from the protruding portion 220 of the abutment tooth 80 while twisting the free end denture 10 around its extending direction with a fingertip. The free end denture 10 is removed from the abutment tooth 80 by removing the groove 131 provided in the denture.

When the free end denture 10 is attached to and detached from the abutment tooth 80 described above, a space S1 is formed between the retaining portion 135 and the gingiva 800 in which the artificial pedicle 120 of the free end denture 10 contacts, so that the retaining portion The abutment tooth 80 of the free end denture 10 can be easily and painlessly attached and detached without the 135 being pressed against the gingiva 800.

In particular, since the protruding portion 220 has a substantially spherical shape, the curved surface of the protruding portion is used to smoothly attach or detach the free end denture 10 to or from the abutment tooth 80 without receiving resistance. It can be attached and detached. Further, when the free end denture 10 is pressed or pulled against the abutment tooth 80 with the attachment / detachment of the denture, a certain degree of freedom can be given in the pressing direction and the pulling direction, and the denture can be attached / detached. It will be easier to do. As a result, a denture wearer who cannot move the fingertip dexterously can easily attach / detach the abutment tooth 80 of the free end denture 10 by himself / herself.

As a result, the free end denture 10 is hard to come off from the abutment tooth 80 under normal use conditions, and it is very easy to attach / detach the denture when attaching or removing it by pinching it with a finger.

Further, since the space S1 is formed between the retaining portion 135 and the gingiva 800 in which the denture base 120 of the free end denture 10 contacts, the protruding portion 220 of the metal crown 210 and this after removing the free end denture 10. There will be a wider gap between the gingiva 800 and the gingiva 800 facing the gingiva 800. By creating such a gap, a sufficient gap can be secured between the protruding portion 220 and the upper surface of the gingiva 800 when the abutment tooth 80 is brushed with a toothbrush or the like after removing the free end denture 10. .. As a result, the food debris accumulated in the gap can be easily removed, the food debris does not remain clogged, and the subsequent occurrence of tooth decay and bad breath can be prevented.

Further, since the end portion of the groove portion 131 opposite to the retaining portion 135 (the upper end portion in the middle of FIGS. 1 and 3) is blocked by a part of the denture main body 110, the food is being bitten. It is possible to reliably prevent food from getting into the groove 131 and clogging it.

Further, in a state where the free end denture 10 is attached to the abutment tooth 80 and occluded, and the periodontal ligament 120 is pressed against the gingiva, a constant space S2 is formed between the end portion and the protruding portion. Even if the tooth is strongly bitten, the occlusal force is not applied to the periodontal ligament 81 of the abutment tooth 80, and the progress of deterioration of the periodontal ligament 81 can be prevented.

Further, the groove width of the groove portion 131 is a groove width that does not interfere when the protrusion portion 220 is inserted to engage the protrusion portion 220, and the protrusion portion 220 is held by the groove portion 131 only by the attractive force of the magnet 140. Therefore, it is not necessary to strictly control the dimensional tolerance between the groove portion 131 and the protrusion portion 220. As a result, the cost of processing the groove of the denture 10 can be reduced, and the denture 10 can be easily attached to and detached from the abutment tooth 80 when it is attached to or detached from the abutment tooth 80.

If the magnetic force of the magnet 140 is made to be strong as it is, the free end denture 10 can be firmly coupled to the abutment tooth 80 even with only the attractive force of the magnetic force. However, as shown in FIGS. 1 and 3, a recessed portion 222 is provided in the lower portion of the spherical body which is the protruding portion 220, and the tip 136 of the retaining portion 135 is engaged with this portion to add the attractive force of the magnet 140. By using the engaging force of the lever as an auxiliary force, it is not necessary to take a complicated structure for preventing the protrusion 220 from separating from the groove 131. That is, the shape of the retaining portion 135 can be made simpler, and the processing cost of this portion can be reduced.

FIG. 6 shows a retaining portion 137 having a simpler configuration in which the shape of the retaining portion 135 is changed according to the above description. Along with this, the lower recessed portion 222 that engages the tip 136 of the retaining portion 135 provided in the lower portion of the protruding portion 220 of the first related embodiment is not shown in the configuration shown in FIG. .. That is, in FIG. 6, a spherical protrusion 220 having no dent is provided on the lower portion. Even such a form belongs to the scope of the present invention.

FIG. 7 is an explanatory view showing an example of a mounting position of a denture and its mounting attachment 1 according to the first related embodiment of the present invention shown in FIGS. 1 to 4. In this figure, the free end denture 10 according to the first related embodiment is attached to the abutment tooth 80 to the missing back teeth on both sides of the lower tooth. It may be attached to the missing part of. That is, as long as even one abutment tooth 80 to which the free end denture 10 is attached remains in an appropriate place, the first related embodiment can be applied to any part without being limited to the attachment state shown in the figure. ..

Further, depending on the case, a fixture such as a clasp is provided at a free end portion opposite to the joint side of the free end denture 10 with the abutment tooth 80 and which is difficult to see from the outside even if the mouth is wide open. The free end denture 10 may be attached more firmly by engaging with the remaining tooth on the free end side.

In addition, unlike the above-described embodiment, the protruding portion may have a substantially hemispherical shape. Even if the protruding portion has a substantially hemispherical shape, the above-mentioned action can be easily realized.

Further, unlike the above-described embodiment, the end portion of the groove portion opposite to the retaining portion may be opened above the denture. Since the end of the groove portion on the opposite side is opened above the denture, the structure of the denture itself can be simplified and the cost can be reduced.

Subsequently, a modified example of the first related embodiment described above will be described. FIG. 8 is a side view corresponding to FIG. 1 showing a modification of the first related embodiment. Further, FIG. 9 is a plan view corresponding to FIG. 2 which partially shows a modified example of the first related embodiment. Regarding the configuration equivalent to the above-described embodiment, the corresponding reference numerals are given as necessary, and detailed description of the structure will be omitted. Further, in FIG. 9, cross-section hatching is omitted in order to facilitate understanding of the description.

In this modification, the protrusion 260 has a thickness of the connection portion 261 with the metal crown 210 thinner than the other portion of the protrusion 260. Further, the shape of the grooved engaging portion 160 is also slightly different from that of the above-described embodiment.

Specifically, the groove width 161a of the abutment tooth side opening of the groove portion 161 is for allowing the free end denture 10A to be attached to and detached from the abutment tooth 80 by the pushing force and the pulling force of the denture wearer's finger. When the free end denture 10A is attached, the degree of preventing the protrusion 260 from coming off from the groove 161 due to the engagement force exerted on the protrusion 260 by the opening of the groove 161 in addition to the magnetic attraction force exerted by the magnet 140 on the protrusion 260. It is sized to.

Explaining based on the drawings, the groove width 161a of the abutment tooth side opening of the groove portion 161 of the grooved engaging portion 160 is larger than the maximum width portion of the protrusion 260, that is, the diameter 260a of the protrusion 260 in FIG. It is slightly narrower, and the groove width 161b inside the groove is slightly wider than the maximum width portion of the protrusion 260, that is, the diameter 260a of the protrusion 260 in FIG.

Since the relative relationship between the groove portion 161 and the protrusion 260 has such a dimensional relationship that so-called latch engagement with each other, once the protrusion 260 engages with the groove 161, the protrusion is combined with the attractive force received from the magnet 140. It becomes difficult for 260 to come out of the groove portion 161.

As a result, once the free end denture 10A is attached to the abutment tooth 80, the free end denture 10A will not easily come off from the abutment tooth 80, and even relatively hard food can be sufficiently tasted and easily digested. You can bite and eat.

Needless to say, even in this modified example, the form of the retaining portion 137 whose tip is not hook-shaped as shown in FIG. 6 can be applied.

Hereinafter, the denture and its attachment attachment according to the present invention will be introduced. As described above, the present invention relates to a periodontal ligament-bearing denture. Here, the definition and technical significance of periodontal ligament-bearing dentures will be described.

Regarding the tooth tissue, the surface of the root of each tooth embedded inside the gingiva of the maxilla and the lower jaw is covered with hard cementum, and the periodontal ligament, which is a very hard fibrous connective tissue, makes the upper and lower jaws respectively. It is connected to the bone around the root of the tooth.

Since each tooth has such a structure, it can withstand an extremely large occlusal force of about 3 MPa to about 9 MPa (average 30 kg to 90 kg per ^{1 cm 2 (300 tons to 900 tons per 1 m 2)) and chew food.} It has become like.

However, in the case of a person who has a habit of biting strongly from a young age, the above-mentioned large bite force is applied to the periodontal ligament for many years, and the periodontal ligament itself is compressed and damaged, leading to resorption of the mandible, causing tooth sway and aging. As it becomes, tooth loss occurs.

Therefore, for those who have a habit of biting teeth strongly, a mucous membrane-bearing denture is attached to the missing tooth to prevent excessive occlusal force from acting on the abutment tooth of the denture during occlusion, and the root of the abutment tooth. Minimize the progression of membrane damage, especially if the number of abutment teeth is reduced, to avoid further loss of abutment teeth, which is essential for denture attachment.

That is, in the case of such a denture wearer, especially when the number of missing teeth increases, a mucosal burden type denture is used for the denture to be attached to the abutment tooth so that damage to the periodontal ligament of the remaining abutment tooth does not progress.

On the other hand, in people who do not have the above-mentioned strong biting habit when eating, the periodontal ligament is generally maintained in a healthy state even in old age, and if some periodontal ligament is damaged and teeth are lost. Even so, the number of missing teeth is small and there are usually many remaining teeth. In such a person, even when a denture is attached to a missing tooth, the periodontal ligament of the abutment tooth is sound and there are many remaining teeth, so that the occlusal force can be distributed to each remaining tooth while occlusal. From the viewpoint, the periodontal ligament-bearing denture is used instead of the mucosa-bearing denture as described above.

Even if a person has a strong habit of biting, if there are many remaining teeth, the periodontal ligament-bearing denture can be used as an abutment because the occlusal force can be distributed to each remaining tooth for the same reason as described above. If you attach it to your teeth and eliminate the habit of biting strongly, you can continue to use this once attached periodontal ligament-bearing denture for a long period of time.

In this way, it can be said that it will be important in the future to improve the quality of life in the aging society in recent years by properly using periodontal ligament-bearing dentures and mucosa-bearing dentures according to the situation. Then, on the premise of using a periodontal ligament-bearing denture in the present invention, the configuration peculiar to the present invention will be described together with this effect in the following embodiments and modifications thereof.

Although each component is also shown in the drawings in the following first and second embodiments and their modified examples, the shapes and dimensions of the components in each drawing are exactly the same. I haven't let you. This is because, of course, all the differences in these shapes and dimensions are included in the scope of the present invention, and therefore, they are intentionally made different for convenience of explanation. Therefore, it should be added that the difference in the shape and dimensional relationship of each component in each drawing does not affect the scope of the present invention at all.

Further, in the description related to each drawing, the vertical direction is defined based on the direction in which the upper side is the artificial tooth (denture body) side of the denture and the lower side is the denture base side. Further, the plan view is a state viewed from the tip side of the denture. In addition, parts that should be hatched in the drawings are omitted as appropriate to facilitate understanding of the explanation.

First, the denture and its attachment attachment according to the second related embodiment of the present invention will be described in detail with reference to the drawings. FIG. 10 is a side view showing a structure of a denture and its attachment attachment according to a second related embodiment of the present invention in a partial cross section. Further, FIG. 11 is a plan view showing a partial cross section of the denture shown in FIG. 10 and its attachment. Further, FIG. 12 is a partially enlarged view of the denture shown in FIG. 10 and its attachment.

The denture and its attachment attachment 1 (hereinafter, appropriately simply referred to as “denture and its attachment attachment 1”) according to the second related embodiment of the present invention are a free end denture 10 attached to one abutment tooth 80 and its attachment. It consists of a mounting attachment 20.

The mounting attachment 20 has a metal crown 210 to be attached to one abutment tooth 80, and a protruding portion 220 made of a magnetic material provided at a predetermined position around the metal crown 210 and having at least a part of its peripheral surface curved. ing.

The protruding portion 220 has a substantially spherical shape in the present embodiment. More specifically, as shown in FIG. 12, the protruding portion 220 has a recessed portion below the proximal end side of the spherical body, that is, a portion on the root side of the abutment tooth 80. The tip 136 of the lower end portion 135 extending from the lower end of the recessed engaging portion 130, which will be described later, enters and engages with the lower recessed portion 222. The protruding portion 220 is made of a magnetic material, and for example, an alloy of stainless steel, gold, or platinum, which is excellent in strength, durability, and corrosion resistance, is used.

In the protruding portion 220, the base end portion 221 of the protruding portion 220 is bonded with a third alloy, gripped with a cast metal, or brazed to a part of the peripheral surface of the metal crown 210 at the time of casting, and the peripheral surface of the metal crown 210 is formed. The protruding portion 220 protrudes from the free end prosthesis 10 in the mounting direction.

Then, the magnet 140, which will be described later, exerts a magnetic tensile force on the protruding portion 220 made of a magnetic material to prevent the free end denture 10 from separating from the abutment tooth 80. Further, in the state shown in FIG. 12, the tip 136 of the lower end 135 is caught by the lower recess 222 of the protrusion 220 to assist the free end denture 10 from being separated from the abutment tooth 80. ..

The free end denture 10 has at least one denture body 110 (111, 112, 113, ...), A denture base 120 that supports the denture body 110, and a recess arranged at an end adjacent to the abutment tooth 80. It has an engaging portion 130 and a magnet 140 that is housed in a magnet holder 150 and is embedded in a denture body 110 or a denture base 120 and provided on the joint portion side with a free end denture 10.

In the case of the present embodiment, the recessed engaging portion 130 is formed integrally with the magnet holder 150. The recessed engaging portion 130 and the magnet holder 150 are made of, for example, stainless steel, which has excellent durability, strength, and corrosion resistance, and the magnet holder 150 is a denture body 110 and a denture base 120 made of denture resin. It is embedded inside. The recessed engaging portion 130 and the magnet holder 150 do not necessarily have to be integrally formed, and they may be formed separately and firmly coupled to each other.

When the present embodiment has such a configuration, the magnet 140 is not exposed in the mouth of the denture wearer, the material of the magnet 140 makes the taste uncomfortable, and fragments of the magnet 140 are in the mouth. It prevents you from entering.

The recessed engaging portion 130 has a recessed portion 131 into which the protruding portion 220 is fitted on the surface side facing the abutment tooth 80 when viewed in a state where the free end denture 10 is attached to the abutment tooth 80. Further, the free end denture 10 is attached to the abutment tooth 80 at the lower end 135 (lower end of FIGS. 10 and 12) of the recessed engaging portion 130 on the artificial denture base side, and is constant with the surface of the gingiva 800. Are spaced apart (see space S1 shown in FIGS. 10 and 12).

The size of the recessed portion 131 is such that it does not interfere with each other when it is inserted to engage the protruding portion 220 with the recessed portion 131. As a result, when the free end denture 10 is attached to the abutment tooth 80, the protruding portion 220 has the attractive force of the magnet 140 provided on the free end denture 10 and, depending on the case, the lower recessed portion 222 and the lower end portion 135. It is pressed against the recessed portion 131 by the engaging force with the tip 136.

Since the protruding portion 220 has a substantially spherical body, the recessed engaging portion 130 moves like a so-called universal joint with the protruding portion 220 fitted to the recessed portion 131 as a fulcrum. Specifically, the recessed engaging portion 130 that accommodates the protruding portion 220 in a fitted state moves within a predetermined center angle range with the center of the protruding portion 220 as the center of rotation, whereby the free end denture 10 is extended. The presence direction can be changed within a predetermined extension angle range with respect to the central axis of the abutment tooth 80.

Further, the lower end portion 135 is attached to the upper surface of the gingiva 800 to which the denture base 120 of the free end denture 10 is attached to the entire bottom surface of the free end denture 10 with saliva interposed therebetween when the free end denture 10 is attached to the abutment tooth 80. They are arranged so as to face each other with a certain space S1 separated from each other.

Further, the end portion of the recessed portion 131 opposite to the lower end portion 135, that is, the upper end portion of FIGS. 10 and 12, is closed by a part of the denture main body 110.

Based on the above configuration, when the free end denture 10 is attached to the abutment tooth 80, the protruding portion 220 engages with the recessed engaging portion 130 before occlusion, as shown in FIG. By combining, the free end denture 10 is connected to the abutment tooth 80, and the bottom surface of the denture base 120 of the free end denture 10 is gingiva through saliva in the mouth (see the portion indicated by dot D in FIG. 10). By fully adhering to the upper surface of the 800, the free end denture 10 is firmly attached to the abutment tooth 80 while maintaining a predetermined play.

Further, in a state where the free end denture 10 is attached to the abutment tooth 80, the protruding portion 220 is fitted into the recessed engaging portion 130, and at least a part of the curved portion of the protruding portion 220 (in the present embodiment). The relative position and relative angle of the free end denture 10 with respect to the abutment tooth 80 can be changed within a predetermined range while a considerable portion) stays in the recessed engaging portion 130 by a magnetic pulling force.

The free end denture 10 is the end portion of the denture base 120 opposite to the abutment tooth 80 (the right end in FIG. 13) when the occlusal force acts on the denture body 110 during occlusal (see force F1 shown in FIG. 13). The protruding portion 220 fitted to the recessed engaging portion 130 moves around the center of rotation until the portion) is pressed against the gingiva 800 and becomes immobile.

As a result, of the saliva (see the dot-shaped portion D shown in FIG. 10) intervening on the entire lower surface of the denture base 120 before occlusion, the denture base 120 and the gingiva 800 on the opposite side of the abutment tooth 80 during occlusion. The intervening saliva is pushed out, and the denture base 120 and the gingiva 800 in this portion are brought into close contact with each other without the saliva (see the intervening position of the dot-shaped portion D shown in FIG. 13).

When the denture and its attachment attachment 1 according to the second related embodiment of the present invention have the above-described configuration, the following effects can be exhibited. Specifically, at the time of occlusion, the end of the free end denture 10 opposite to the abutment tooth 80 is pressed against the gingiva 800 and pressed, and the end of the free end denture 10 on the abutment tooth side is one of the occlusal forces. The portion can act only in the substantially axial direction of the abutment tooth 80 (see the change from the state shown in FIG. 10 to the state shown in FIG. 13 and the occlusal force F1 in FIG. 13).

As a result, the occlusal force applied to the free end denture 10 can be equally applied to the abutment tooth 80 and the portion of the free end denture 10 pressed against the gingiva 81, and the occlusal force is prevented from being applied only to the abutment tooth 80. It can contribute to reducing the burden on the abutment tooth 80.

Further, it is not preferable to occur in a free end denture having a form in which the extending direction of the free end denture 10 is maintained in the same state as before the occlusion without changing the angle even at the time of occlusion with respect to the central axis of the abutment tooth 80. The generation of a moment, that is, a moment that tilts the abutment tooth 80 with respect to the central axis before its occlusion is suppressed.

As a result, the free end denture side of the periodontal ligament 81 is crushed to generate excessive compressive stress, or the side of the periodontal ligament 81 opposite to the free end denture 10 is forcibly pulled to generate excessive tensile stress. To prevent.

That is, the force applied to the abutment tooth 80 (the force applied and its action direction) equivalent to the force applied by the occlusal force before attaching the free end denture 10 to the abutment tooth 80 (the force applied and its action). Direction) can be maintained. As a result, the periodontal ligament 81 can be maintained in a healthy state, the abutment tooth 80 can be made to last for a long time without being damaged, and the free end denture 10 attached to the abutment tooth 80 can be used continuously for a long period of time.

Even if the person has a habit of biting strongly, if the periodontal ligament-bearing free end denture 10 is attached to the abutment tooth 80 and the habit of biting strongly is changed in a state where there are many remaining teeth, further remaining teeth can be obtained. It is possible to prevent the defect of the abutment tooth 80 without deteriorating the condition of the periodontal ligament of the abutment tooth, and to continue using the free end denture 10 attached to the abutment tooth 80 for a long period of time. it can.

Further, the force exerted on the protruding portion 220 generated by the inclination of the free end denture 10 at the time of occlusion can be applied in the axial direction of the abutment tooth 80 in the same manner as at the time of normal occlusion without the denture. This action suppresses the action of pulling the protrusion 220 toward the free end denture 10, that is, in the lateral direction intersecting the axial direction of the abutment tooth 80. As a result, it is possible to avoid the problematic phenomenon that occurs in the conventional example, such as pulling and tilting the abutment tooth 80 toward the free end denture 10 even at the time of occlusion.

As a result, the fibrous tissue of the periodontal ligament 81 on the free end denture side of the abutment tooth 80 (the right periodontal ligament in FIG. 13) 81 is forcibly crushed, or the periodontal ligament on the side opposite to the free end denture 10 of the abutment tooth 80 (Fig. It is possible to prevent the periodontal ligament 81 from being damaged by long-term occlusion after wearing the denture without forcibly stretching the fibrous tissue of the left periodontal ligament (81 in 13), and to continue using the denture for a long period of time. it can.

Further, by forming a space S1 between the engaging portion 130 with a dent and the gingiva 800 in which the denture base 120 of the free end denture 10 contacts, a dent is formed when the free end denture 10 is attached to or removed from the abutment tooth 80. The free end denture 10 can be easily and comfortably attached to and detached from the abutment tooth 80 without the engaging engaging portion 130 being pressed against the gingiva 800.

Further, since the space S1 is formed between the dented engaging portion 130 and the gingiva 800 in which the denture base 120 of the free end denture 10 contacts, the protruding portion 220 of the metal crown 210 and the protruding portion 220 thereof are formed after the denture is removed. There will be a wider gap between the gingiva 800 and the opposite gingiva 800. By creating such a gap, it is possible to easily remove the food residue accumulated in the gap when the denture is removed and the abutment tooth 80 is brushed with a toothbrush or the like. As a result, these food scraps do not remain clogged in this portion, and the subsequent occurrence of tooth decay and bad breath can be prevented.

Further, the size of the opening of the recessed portion 131 is such that it does not interfere with the insertion of the protruding portion 220 to engage with the protruding portion 220, and the protruding portion 220 is fitted into the recessed portion 131 only by the attractive force of the magnet 140. By doing so, it is not necessary to strictly control the dimensional tolerance between the opening of the recess 131 and the protrusion 220. As a result, the cost of the free end denture 10 can be reduced, and the free end denture 10 can be easily attached to and detached from the abutment tooth 80.

As a result, the denture wearer can be given a comfortable fit and bite, can continue to bite comfortably while chewing food, and can continue to wear the free end denture 10 without stress and enjoy eating. Will be able to. As a result, food can be digested properly, and it is possible to contribute to the improvement of physical condition while maintaining health, which is especially important for the elderly.

In addition, there is no extra gap between the abutment tooth 80 and the free end denture 10 during occlusion, and food that cannot be crushed by being caught in such a gap may be swallowed as it is, resulting in indigestion in the gastrointestinal tract. Absent.

As described above, the extending direction of the free end denture 10 can be reasonably changed within a predetermined angle range with respect to the central axis of the abutment tooth 80. As a result, it is not necessary to apply an excessive force to the connecting portion between the abutment tooth 80 and the free end denture 10 at the time of occlusion. Similarly, it is possible to give a comfortable wearing feeling to the denture wearer, and it is possible to prolong the life of the abutment tooth 80 without applying excessive stress to the abutment tooth 80.

As a result, it is possible to prevent the periodontal ligament 81 from being damaged or the periodontal ligament itself from being crushed due to an excessive force applied to the abutment tooth 80, and it is possible to prevent the valuable abutment tooth 80 from being lost. Further, the gingiva 800 is not damaged due to the breakage of the joint portion of the denture, and the problem of accidental ingestion of the damaged portion does not occur.

Further, at the time of occlusion, the end of the free end denture 10 opposite to the abutment tooth 80 is pressed against the gingiva 800 and pressed, and the end of the free end denture 10 on the abutment tooth side supports a part of the occlusal force. It can act only in the substantially axial direction of the denture 80. As a result, an unfavorable moment associated with the use of the free end denture having a form in which the extending direction of the free end denture 10 is maintained in the same state as before occlusion without changing the angle with respect to the central axis of the abutment tooth 80. That is, the generation of a moment that tilts the abutment tooth with respect to its central axis is suppressed.

As a result, it is possible to prevent the free end denture side of the periodontal ligament 81 from being crushed and excessive compressive stress being generated, or the side of the periodontal ligament 81 opposite to the free end denture being forcibly pulled to generate excessive tensile stress. To do.

As a result, the periodontal ligament 81 can be maintained in a healthy state, the abutment tooth 80 can be made to last for a long time without being damaged, and the free end denture 10 attached to the abutment tooth 80 can be used continuously for a long period of time.

Even if the person has a habit of biting strongly, if the periodontal ligament-bearing free end denture 10 is attached to the abutment tooth 80 and the habit of biting strongly is changed in a state where there are many remaining teeth, further remaining teeth can be obtained. Preventing the defect of the abutment tooth 80 without deteriorating the condition of the periodontal ligament 81 of the abutment tooth 80, and continuing to use the free end denture 10 attached to the abutment tooth 80 for a long period of time. Can be done.

Further, the force exerted on the protruding portion 220 generated by the inclination of the free end denture 10 at the time of occlusion acts in the axial direction of the abutment tooth 80 in the same manner as at the time of normal occlusion without the denture, and the protruding portion 220 is made into the free end denture. It suppresses the action in the direction of pulling toward 10, that is, in the lateral direction intersecting the axial direction of the abutment tooth 80. As a result, it is possible to avoid the problem that occurs in the conventional free end denture having a form in which the abutment tooth 80 is pulled toward the free end denture 10 and tilted even at the time of occlusion.

As a result, the fibrous tissue of the periodontal ligament 81 on the free end denture side of the abutment tooth 80 is not forcibly crushed, and the fibrous tissue of the periodontal ligament 81 on the opposite side of the free end denture 10 of the abutment tooth 80 is not forcibly stretched. , Prevents the periodontal ligament 81 from being damaged by long-term occlusion after wearing the free end denture 10.

When attaching the free end denture 10 to the abutment tooth 80, one end of the free end denture 10 is twisted around the extending direction of the free end denture 10 with a fingertip to the protruding portion 220 of the abutment tooth 80. The free end denture 10 is attached to the abutment tooth 80 by pressing the recessed portion 131 provided in the above. On the other hand, when the free end denture 10 is removed from the abutment tooth 80, one end of the free end denture 10 is twisted from the protruding portion 220 of the abutment tooth 80 while twisting the free end denture 10 around its extending direction with a fingertip. The free end denture 10 is removed from the abutment tooth 80 by removing the recessed portion 131 provided in the denture.

When the free end denture 10 is attached to and detached from the abutment tooth 80 described above, the space S1 is formed between the lower end portion 135 and the gingiva 800 in which the gingival base 120 of the free end denture 10 contacts, so that the lower end portion 135 is formed. The abutment tooth 80 of the free end denture 10 can be easily and comfortably attached and detached without being pressed against the gingiva 800.

In particular, since the protruding portion 220 has a substantially spherical shape, the curved surface of the protruding portion 220 is used to smoothly attach or detach the free end denture 10 to or from the abutment tooth 80 without receiving resistance. It can be attached and detached. Further, when the free end denture 10 is pressed or pulled against the abutment tooth 80 with the attachment / detachment of the denture, a certain degree of freedom can be given in the pressing direction and the pulling direction, and the denture can be attached / detached. It will be easier to do. As a result, a denture wearer who cannot move the fingertip dexterously can easily attach / detach the abutment tooth 80 of the free end denture 10 by himself / herself.

As a result, the free end denture 10 is hard to come off from the abutment tooth 80 under normal use conditions, and it is very easy to attach / detach the denture when attaching or removing it by pinching it with a finger.

Further, since the space S1 is formed between the lower end portion 135 and the gingiva 800 in which the denture base 120 of the free end denture 10 contacts, the protruding portion 220 of the metal crown 210 and the protruding portion 220 thereof after the free end denture 10 is removed. There will be a wider gap between the gingiva 800 and the opposite gingiva 800. By creating such a gap, a sufficient gap can be secured between the protruding portion 220 and the upper surface of the gingiva 800 when the abutment tooth 80 is brushed with a toothbrush or the like after removing the free end denture 10. .. As a result, the food debris accumulated in the gap can be easily removed, the food debris does not remain clogged, and the subsequent occurrence of tooth decay and bad breath can be prevented.

Further, since the end portion of the recessed portion 131 opposite to the lower end portion 135 (the upper end portion in FIGS. 10 and 12) is blocked by a part of the denture main body 110, the food is being bitten. It is possible to reliably prevent food from getting into the recess 131 and clogging it.

Further, the groove width of the recessed portion 131 has a dimension that does not interfere with the insertion of the protruding portion 220 to engage with the protruding portion 220, and the protruding portion 220 is held by the recessed portion 131 only by the attractive force of the magnet 140. This eliminates the need to strictly control the dimensional tolerance between the recessed portion 131 and the protruding portion 220. As a result, it is possible to reduce the cost of processing the recessed portion of the denture 10, and it is possible to easily attach / detach the denture 10 when attaching / detaching it to / from the abutment tooth 80.

If the magnetic force of the magnet 140 is made to be strong as it is, the free end denture 10 can be firmly coupled to the abutment tooth 80 even with only the attractive force of the magnetic force. However, as shown in FIGS. 10 and 12, a recessed portion 222 is provided in the lower portion of the spherical body which is the protruding portion 220, and the tip 136 of the lower end portion 135 is engaged with this portion in addition to the attractive force of the magnet 140. By using this engaging force as an auxiliary force, it is not necessary to take a complicated structure for preventing the protruding portion 220 from separating from the recessed portion 131. That is, the shape of the lower end portion 135 can be made simpler, and the processing cost of this portion can be reduced.

FIG. 14 shows a lower end portion 137 having a simpler configuration in which the shape of the lower end portion 135 is modified according to the above description. Along with this, the lower recess 222 that engages the tip 136 of the lower end 135 provided in the lower portion of the protrusion 220 of the second related embodiment is not shown in the configuration shown in FIG. That is, in FIG. 14, a spherical protrusion 220 having no dent is provided on the lower portion. Even such a form belongs to the scope of the present invention.

FIG. 15 is an explanatory view showing an example of a mounting position of a denture and its mounting attachment 1 according to a second related embodiment of the present invention shown in FIGS. 10 to 12. In this figure, the free end denture 10 according to the second related embodiment is attached to the abutment tooth 80 to the missing back teeth on both sides of the lower tooth. It may be attached to the missing part of. That is, as long as even one abutment tooth 80 to which the free end denture 10 is attached remains in an appropriate place, the second related embodiment can be applied to any part without being limited to the attachment state shown in the figure. ..

Further, depending on the case, a fixture such as a clasp is provided at a free end portion opposite to the joint side of the free end denture 10 with the abutment tooth 80 and which is difficult to see from the outside even if the mouth is wide open. The free end denture 10 may be attached more firmly by engaging with the remaining tooth on the free end side.

In addition, unlike the above-described embodiment, the protruding portion may have a substantially hemispherical shape. Even if the protruding portion has a substantially hemispherical shape, the above-mentioned action can be easily realized.

Subsequently, a modified example of the second related embodiment described above will be described. FIG. 16 is a side view corresponding to FIG. 10 showing a modified example of the second related embodiment. Further, FIG. 17 is a plan view corresponding to FIG. 11 which partially shows a modified example of the second related embodiment. Regarding the configuration equivalent to the above-described embodiment, the corresponding reference numerals are given as necessary, and detailed description of the structure will be omitted. Further, in FIG. 17, cross-section hatching is omitted in order to facilitate understanding of the description.

In this modification, the protrusion 260 has a thickness of the connection portion 261 with the metal crown 210 thinner than the other portion of the protrusion 260. Further, the shape of the recessed engaging portion 160 is also slightly different from that of the above-described embodiment.

Specifically, the width 161a of the abutment tooth side opening of the recessed portion 161 is set so that the free end denture 10A can be attached to and detached from the abutment tooth 80 by the pushing force and the pulling force of the denture wearer's finger. When the free end denture 10A is attached, the protrusion 260 is prevented from coming off from the recess 161 due to the magnetic attraction force exerted by the magnet 140 on the protrusion 260 and the engaging force exerted by the opening of the recess 161 on the protrusion 260. It is sized to the extent that it does.

Explaining based on the drawings, the width 161a of the abutment tooth side opening of the recessed portion 161 of the recessed engaging portion 160 is larger than the maximum width portion of the protruding portion 260, that is, the diameter 260a of the protruding portion 260 in FIG. It is slightly narrower, and the width 161b in the recessed portion is slightly wider than the maximum width portion of the protruding portion 260, that is, the diameter 260a of the protruding portion 260 in FIG.

Since the relative relationship between the recessed portion 161 and the protruding portion 260 has such a dimensional relationship that so-called latch engagement with each other, once the protruding portion 260 engages with the recessed portion 161, it is combined with the attractive force received from the magnet 140. The protruding portion 260 is less likely to come off from the recessed portion 161.

As a result, once the free end denture 10A is attached to the abutment tooth 80, the free end denture 10A will not easily come off from the abutment tooth 80, and even relatively hard food can be sufficiently tasted and easily digested. You can bite and eat.

Needless to say, also in this modification, the form of the lower end portion 137 whose tip is not hook-shaped as shown in FIG. 14 can be applied.

Hereinafter, the denture and its attachment attachment according to the present invention will be introduced. First, the denture and its attachment attachment according to the third embodiment and its modified example will be described.

The denture and its attachment attachment according to the third embodiment relate to a mucosal burden type denture and its attachment attachment. Here, the definition and technical significance of mucosal-bearing dentures will be described.

Some people who need to wear dentures cannot implant an implant in a solid part of the mandible due to individual constitutional differences, and cannot apply excessive force to the implant more than necessary. In addition, there are some people whose periodontal ligament at the residual root is considerably damaged with age even if the implant is not implanted.

On the other hand, those who implant the implant in the firm jawbone and do not adversely affect the implant even if some excessive force is applied, those who do not occlude so strongly after implanting, until implanting the implant However, some people maintain a healthy condition with respect to the periodontal ligament at the residual root.

If the implant is placed in the part where the jawbone is not firm, or if the periodontal ligament of the residual root is considerably crushed and damaged, the denture is attached to the implant or the residual root and the denture is occluded. Not only that, if the occlusal force acts on the implant and the residual root, the periodontal ligament is compressed by that amount and the periodontal ligament is further damaged.

It is clearly undesirable to apply excessive force to the implant or residual root of such an implant. Further, if the periodontal ligament is extremely damaged, the residual root portion itself cannot withstand the burden of attaching the denture, and the residual root portion may eventually be lost.

For denture wearers whose periodontal ligament in the implant or residual root has been damaged with age, it is possible to prevent excessive force from being applied to the implant-embedded part or to prevent the residual root from being damaged. It is important to. Therefore, the occlusal force acts as a pressing force that presses the gingiva on the denture base of the denture (denture for intermediate missing teeth) and the denture itself sinks, thereby exerting the action of receiving (bearing) this occlusal force. It is preferable to use a mucous membrane-bearing denture.

The above reasons will be supplemented with a more objective explanation. Bite force quotient is extremely large, about 3 MPa to about 9 MPa (average 30 kg to 90 kg per ^{1 cm 2} (300 tons to 900 tons per ^{1 m 2)).} Therefore, even if a healthy periodontal ligament can bear the burden, if the periodontal ligament is not healthy due to periodontal disease or the like, the burden becomes excessive and pain occurs at the time of occlusion. Furthermore, there are many cases in which the periodontal ligament is damaged, resulting in tooth extraction.

If you feel pain during such an occlusion, you cannot expect to have a normal diet in your daily life, which will lead to serious problems in terms of quality of life. Therefore, if the strength and durability of the so-called denture abutment is insufficient, such as when it is not possible to apply excessive force to the implant or the periodontal ligament of the residual root is unhealthy, the implant burden and the root canal when the denture is attached. It should be devised so as not to burden the membrane. In this case, as the most effective countermeasure, it is a preferable selection means to attach the above-mentioned mucosal burden type denture.

Although each component is shown in each drawing in the following third embodiment and the description of the modified examples thereof, the shape and dimensions of each component in each drawing are exactly the same. Absent. This is because, of course, all the differences in these shapes and dimensions are included in the scope of the present invention, and therefore, they are intentionally made different for convenience of explanation. Therefore, it should be added that the difference in the shape and dimensional relationship of each component in each drawing does not affect the scope of the present invention at all.

Further, in the description related to each drawing, the vertical direction is defined based on the direction in which the upper side is the artificial tooth (denture body) side of the denture and the lower side is the denture base side. Therefore, when the denture is attached to the upper jaw, the hierarchical relationship described below is reversed. Further, the plan view is a state viewed from the tip side of the denture. In addition, parts that should be hatched in the drawings are omitted as appropriate to facilitate understanding of the explanation.

FIG. 18 is an explanatory view showing a mounting state of the denture and its mounting attachment according to the third embodiment of the present invention. The denture and its attachment attachment according to the third embodiment are a denture as the denture 10 for intermediate missing teeth (hereinafter, appropriately simply referred to as "denture") and its attachment attachment. The mounting attachment has a denture support portion 300 and a magnetic material accommodating portion 140.

The denture support portion 300 is composed of a magnetic member attached to the implant 410 or the residual root portion 420. Since the implant 410 or the residual root portion 420 is known, the implant 410 or the residual root portion 420 is shown in the form of the residual root portion 420 in FIGS. 18 to 20, 29, and 30, and the implant 410 or the residual root portion 420 is accurately shown in other drawings. It is not drawn and is shown roughly by a two-dot chain line. Further, in the following description, the implant 410 or the residual root portion 420 will be simply referred to as “implant 410” as necessary.

The denture support portion 300 is provided so as to project from the upper surface of the implant 410 or the residual root portion 420. Since the denture support portion 300 projects upward from the implant 410 or the residual root portion 420, in the case of the third embodiment at the time of occlusion, a moderate occlusal force F that is not so large matches the axial direction of the implant 410 or the residual root portion 420. It can only act directly to the implant 410 or the residual root portion 420 and its periodontal ligament 421 to prevent an inappropriate bending moment and the excessive stress associated therewith.

The denture support portion 300 has a protrusion shape as described above, and the order of the tip flat portion 310, the tip side curved taper portion 320, the large diameter portion 330, the proximal end side curved taper portion 340, and the strut portion 350 from the tip side thereof. It is formed on the upper side in the protruding direction, and the embedded portion 360 is connected to the strut portion 350.

Then, the embedded portion 360 of the denture support portion 300 has a screw structure in the present embodiment and is attached to the implant 410 or the residual root portion 420. It should be noted that the embedded portion 360 may be attached with an adhesive or the like without forming a screw.

The denture support portion 300 is made of a magnetic material, and for example, an alloy of stainless steel, gold, or platinum, which is excellent in strength, durability, and corrosion resistance, is used. Then, while the denture is mounted, the magnet 150 exerts a magnetic tensile force on the denture support portion 300 made of a magnetic material, so that the denture 10 for intermediate missing teeth is an implant 410 or a denture attachment portion composed of a residual root portion 420 and a denture support portion 300. I try not to leave.

Further, a part of the outer peripheral surface of the large diameter portion 330 of the denture support portion 300 is slidably contacted with the sliding surface for moving the support portion 147 formed on a part of the inner peripheral surface of the magnetic material accommodating hole 145. The denture support portion 300 slides without receiving resistance when it is held inside the magnetic material accommodating hole 145 or when it is taken in and out of this hole.

The sliding surface 147 for moving the support portion is the magnetic material accommodating hole 145 in the third embodiment and each of the modified examples described later, and the magnetic material accommodating hole 245 in the fourth embodiment and each of the modified examples. The forming range in the circumferential direction is appropriately different so as not to interfere with the magnetic material engaging portions 500 to 800 protruding from the inside.

Regarding this, reference numerals 147 are added to the drawings on the right side of FIGS. 22, 24, 26, and 28 for reference only as an example. Further, in these drawings, there is a gap between the sliding surface for moving the support portion 147 and the large diameter portion 330 of the denture support portion 300, but this is merely for the sake of easy understanding of the invention, and is actually It should be added that there is no such gap and the two can slide with each other while abutting against each other.

The denture 10 for intermediate missing teeth has at least one denture body 110 (111, 112, ...), A denture base 120 that supports the denture body 110, and a magnetic material accommodating portion 140. The magnetic material accommodating portion 140 is provided at both ends of the denture 10 for intermediate missing teeth, and has a structure for holding the denture supporting portion 300 in an accommodating state. The support member accommodating and holding portion 100 includes a magnetic material accommodating portion 140, a magnet 150, and a magnetic material engaging portion 500.

The magnet 150 and the magnetic material engaging portion 500 are housed in the magnet holder 160 and then embedded in the denture body 110 and the denture base 120, and are provided on both end sides of the denture 10 for intermediate missing teeth. The detailed structure and description of the magnetic material engaging portion 500 will be described later.

When viewed with the denture attached, an opening 141 for attaching and detaching the denture is formed on the gingival side of the support member accommodating and holding portion 100. That is, the support member accommodating and holding portion 100 has an opening 141 of the denture 10 for intermediate missing teeth as an entrance / exit of the denture support portion 300. Further, in the support member accommodating holding portion 100, a magnetic material accommodating hole 145 having this entrance / exit as an opening 141 extends from the artificial denture base 120 of the denture 10 for intermediate missing teeth to the middle of the inside of the denture main body 110 as an artificial tooth. It is formed.

The size of the magnetic material accommodating hole 145 is such that they do not interfere with each other when they are inserted into the magnetic material accommodating hole 145 in order to engage the denture support portion 300.

In the case of the present embodiment, the support member accommodating and holding portion 100 is formed by integrally forming the magnetic material accommodating portion 140 and the magnet holder 160. The support member accommodating holding portion 100 and the magnet holder 160 are made of, for example, stainless steel having excellent durability, strength, and corrosion resistance, and are embedded in the denture body 110 and the denture base 120 made of denture resin. The magnetic material accommodating portion 140 and the magnet holder 160 do not necessarily have to be integrally formed, and they may be formed separately and firmly bonded to each other.

When the present embodiment has such a configuration, the magnet 150 is not exposed in the mouth of the denture wearer, the material of the magnet 150 makes the taste uncomfortable, and fragments of the magnet 150 are in the mouth. It prevents you from entering.

Further, as described above, sliding surfaces are formed on at least a part of the periphery of the denture support portion 300 and at least a part of the inner peripheral wall of the magnetic material accommodating hole 145. Then, by each of these sliding surfaces, the denture support portion 300 slides a predetermined surface inside the magnetic material accommodating hole 145 of the magnetic material accommodating portion 140 between the opening 141 and the artificial tooth side of the denture 10 for intermediate missing teeth. It is movable. As a result, the denture can be smoothly attached to and detached from the denture support portion 300.

Further, as a peculiar feature of the third embodiment, when the denture 10 for an intermediate missing tooth is attached, the denture support portion 300 and the hole bottom end surface portion (artificial tooth side end portion) of the magnetic material accommodating hole 145 facing the denture support portion 300 are provided. ) 146 does not come into contact with each other, and a first constant space (first space S1) remains between them (see FIG. 18).

On the other hand, even at the time of occlusion, the tip flat portion 310 of the denture support portion 300 and the hole bottom end surface portion 146 of the magnetic material accommodating hole 145 facing the tip flat portion 310 do not abut in the same manner. Specifically, at the time of occlusion, the denture base 120 of the denture 10 for intermediate missing teeth is pressed against the gingiva 900 by the occlusal force and sinks, thereby taking charge of all the occlusal force. As a result, a second constant space (second space S2) smaller than the first space S1 is provided between the tip flat portion 310 of the denture support portion 300 and the hole bottom end surface portion 146 of the magnetic material accommodating hole 145 facing the denture support portion 300. ) Remains (see FIG. 19).

FIG. 19 is an explanatory view showing a state in which the denture shown in FIG. 18 is attached and then occluded. As a peculiar feature of the third embodiment, even at the time of occlusion, the denture support portion 300 and the hole bottom end surface portion 146 of the magnetic material accommodating hole 145 of the magnetic material accommodating portion 140 facing the denture support portion 300 are the above-mentioned second. By forming the space S2, it can be seen that they do not come into contact with each other.

FIG. 20 is a diagram illustrating an adjustment method for mounting the denture and its attachment attachment according to the third embodiment shown in FIG. The difference in the height of the entire denture 10 for intermediate defects when the denture base 120 of the denture 10 occludes after mounting the denture and presses the denture 900 of the wearer and sinks, that is, the denture formed at the time of mounting the denture described above. The distance between the tip flat portion 310 of the denture support portion 300 in the space S1 of 1 and the hole bottom end surface portion 146 of the magnetic material accommodating hole 145, and the denture in the second space S2 formed when the denture is occluded after mounting. The difference in the distance between the tip flat portion 310 of the support portion 300 and the hole bottom end face portion 146 of the magnetic material accommodating hole 145 varies depending on the individual denture wearer. Therefore, as shown in FIG. 20, a spacer 90 having a flat upper and lower surface is used to adjust the spacer 90 so that the upper and lower surfaces stay at appropriate positions when the denture is attached and when the denture is occluded, so that the above intervals are individually and correctly secured when the denture is manufactured. There is.

Further, as described above, the upper surface 91 and the lower surface 92 of the spacer 90 are flat, and the lower surface 92 and the upper surface of the pacer 90 of the tip flat portion 310 of the denture support portion 300 and the hole bottom end surface portion 146 of the magnetic material accommodating hole 145. 91 are in surface contact with each other. The upper and lower surfaces of the spacer 90 are formed in a state of being parallel to each other.

As a result, the second space S2 should be originally formed when the denture 10 for the intermediate missing tooth is attached and then occluded. However, when the occlusal force exceeds the normal occlusal force F, the magnetic material is used. Even if the hole bottom end surface portion 146 of the magnetic material accommodating hole 145 of the accommodating portion 140 and the hole bottom end surface portion 146 of the denture support portion 300 facing the hole bottom end surface portion 146 abut against each other, they abut each other while maintaining a surface contact state. It has a structure.

As a result, when the mucous membrane-bearing type denture 10 for intermediate missing teeth is attached and occlused as much as possible, the occlusal force F is applied to the contact surface between the denture and the denture support portion 300 at both ends of the denture 10 for intermediate missing teeth. The stress concentration of the occlusal force F can be avoided by applying the occlusal force F evenly in the plane contact, and the denture and the denture support portion 300 are prevented from being damaged.

Further, the magnet 150 is embedded in the denture 10 for intermediate missing teeth via the magnet holder 160 adjacent to the magnetic material accommodating portion 140. Then, the denture is kept in a mounted state by applying a magnetic attraction force to the denture support portion 300 housed in the magnetic material accommodating portion 140.

The magnetic material engaging portion 500 engages with the denture support portion 300 accommodated in the magnetic material accommodating hole 145 of the magnetic material accommodating portion 140 by using an elastic force, so that when the denture 10 for an intermediate missing tooth is attached. It has a structure in which the denture support portions 300 located at both ends are simultaneously fitted into the magnetic material accommodating portion 140 and then fastened therein. The detailed configuration of the magnetic material engaging portion 500 will be described later.

Based on the above configuration, when the denture 10 for intermediate missing teeth is attached to the denture attachment portion as described above, the denture support portion 300 is accommodated inside the magnetic material accommodating portion 140 before occlusal. As a result, the denture 10 for the intermediate missing tooth binds to the implant 410 and the residual root portion 420, and the bottom surface of the denture base 120 of the denture 10 for the intermediate missing tooth 10 is shown by saliva D in the mouth (dot D in FIG. 18). The denture for intermediate missing teeth 10 is firmly attached to the residual root portion 420 while maintaining a predetermined play (see FIG. 18).

Then, as described above, the denture support portion 300 is slidably engaged with the magnetic material accommodating hole 145 of the magnetic material accommodating portion 140, so that the denture 10 for the intermediate missing tooth is slidably engaged with the two implants 410 and the residual root portion 420. At the same time, the denture base 120 of the denture 10 for the intermediate missing tooth adheres to the denture 900 while interposing saliva D on the entire bottom surface thereof, so that the denture 10 for the intermediate missing tooth 10 is attached to the two implants 410 and the residual root portion 420. (See FIG. 19).

Further, each magnet 150 provided in the denture 10 for the intermediate missing tooth exerts a magnetic pulling force on the denture supporting portion 300 provided near each of them, so that the denture 10 for the intermediate missing tooth 10 has two implants 410 and a residual root portion 420. I try not to come off.

Further, when the denture 10 for the intermediate missing tooth is attached to the residual root portion 420, the denture support portion 300 is slidable in the magnetic material accommodating portion 140 of the denture for the intermediate missing tooth 10. The 10 can be moved in parallel to the two implants 410 and the residual root portion 420 by a predetermined amount in the vertical direction (longitudinal direction) while being held between the two denture support portions 300 by a magnetic tensile force.

Hereinafter, the features of the present invention common to the third embodiment described above and the respective modifications described below, and the fourth embodiment and the respective modifications thereof will be emphasized. As a common structure in the present invention, the magnet 150 is on the side of the denture support portion 300 made of a magnetic material, and faces the denture extending direction between the denture base 120 and the denture body 110 of the denture 10 for intermediate missing teeth. It can be mentioned that they are arranged sideways. As a result, a sufficient magnetic tensile force can be applied evenly to the denture support portion 300 from both ends of the denture 10.

Therefore, unlike other structures such as the case where the magnet 150 is attached in the longitudinal direction of the implant 410, which can generate only an extremely weak magnetic force, the denture can be firmly attached. That is, the technical significance of the present invention is that by placing the magnet 150 having a sufficient magnetic force in such an arrangement state, the magnetic force lines of the magnet 150 are sufficiently and efficiently exerted on the denture support portion 300 made of a magnetic material. ..

Subsequently, the magnetic material engaging portion 500, which is a configuration peculiar to the present invention, will be described. The magnetic material engaging portion 500 includes a so-called piercing engaging hook provided at a predetermined position on the inner peripheral wall of the magnetic material accommodating portion 140 and which can be expanded by elastic deformation. The magnetic material engaging portion 500 is made of, for example, spring steel which is elastically deformable and has excellent durability.

Then, when the denture is attached or detached, the engaging hook expands due to elastic deformation to release the engagement between the engaging hook and the denture support portion 300. At the same time, while the denture is attached, the engaging hook engages with the predetermined position of the denture support portion 300 to fasten the denture support portions 300 at both ends of the denture for intermediate missing teeth 10 into the magnetic material accommodating portion 140, respectively. Prevents unexpected disengagement from the denture support portion 300 located at both ends or any one end of the denture 10 for intermediate missing teeth.

As described above, the characteristic structure of the third embodiment is that the magnetic material engaging portion 500 has a crotch shape and is composed of a crotch hook 500 that can be expanded by elastic deformation by elastic force. The stab hook 500 has a structure for engaging with and disengaging the denture support portion 300 (protruding portion).

The magnetic material engaging portion 500 is configured as a crotch hook 500 in the third embodiment, but in a modified example of the third embodiment described later, the bearing latch engaging portion 600 and the shaft latch are engaged. It is configured as a joint portion 700 and a leaf spring latch engaging portion 800. The same applies to the fourth embodiment, which is a mucous membrane-bearing type denture for intermediate missing teeth, and each modification thereof.

The magnetic material engaging portion 500 and the engaging portions according to the above-mentioned modifications are all adapted to the respective shapes in the magnetic material accommodating hole 145 of the magnetic material accommodating portion 140 with the base end portion or the appropriate shape and dimensions. It is fixed. Then, the portion that engages with the magnetic denture support portion 300, which is the tip, is located in the accommodation space of the denture support portion 300 that is accommodated and taken in and out of the magnetic body accommodating hole 145 from a predetermined position. It protrudes while having a shape and dimensions.

That is, the above-mentioned magnetic material engaging portion has a different shape, the base end portion is fixed to the engaging portion accommodating hole 148 having the same different shape in a different form, and the engaging portion at the tip is the denture support portion 300. Each deformed portion protrudes into the magnetic material accommodating hole in an appropriate form so as to fully exert the action of the magnetic material engaging portion at the time of accommodating and taking in and out.

In addition, in FIGS. 21 to 28, in order to simplify the drawing and facilitate understanding, the engaging portion accommodating hole 148 is not shown, and the base end portion of each magnetic material engaging portion is attached. The fixed portion inside the engaging portion accommodating hole 148 is shown as a partial form of the magnetic material accommodating portion 140.

The puncture hook 500 is formed so as to sandwich the base end portion 510 fixed inside the magnetic material accommodating portion 140 and the denture support portion 300, and is composed of the puncture portion 520 protruding inside the magnetic material accommodating hole 145.

Then, the puncture hook 500 is elastically deformed from the puncture portion 520 or fitted into the tip side curved taper portion 320 of the artificial tooth support portion 300, and then the puncture portion 520 is divided into two by elastic force in the large diameter portion 330 and the width of the puncture portion 520 is wide. The large diameter portion 330 is moved along the longitudinal direction while being expanded and deformed in the direction, and when it reaches the proximal end side curved taper portion 340, it returns to the original shape and is between the support column portion 350 and the proximal end side curved tapered portion 340. It is designed to remain engaged.

FIG. 21 is a diagram for sequentially explaining how to engage the stab hook 500, which is the magnetic material engaging portion, and the denture support portion 300 with which the magnetic material engaging portion is engaged, according to the third embodiment shown in FIG. Further, FIG. 22 is an explanatory view corresponding to FIG. 21, in which the left side shows a side view and the right side shows a plan view.

In each drawing, the positional relationship between the puncture hooks 500 at both ends of the denture 10 for intermediate missing teeth and the denture support portion 300 with which the denture hooks 500 are engaged is shown at the timing of simultaneous occurrence in the process of mounting the denture.

21 (a), 22 (a-1), and 22 (a-2) show that the tip flat portion 310 of the denture support portion 300 is aligned with the magnetic material accommodating holes 145 at both ends of the denture 10 for intermediate missing teeth. Then, the first step of attaching the denture 10 for the intermediate missing tooth to the denture attachment portion so that the tip flat portion 310 of the denture support portion 300 enters from the opening 141 of the magnetic material accommodating hole 145 is shown. It shows a state in which the hook 500 is located slightly above the tip-side curved tapered portion 320 of the denture support portion 300.

Subsequently, in FIGS. 21 (b), 22 (b-1), and 22 (b-2), following the above-mentioned step, the sasumata hook 500 is engaged with the tip-side curved tapered portion 320 of the denture support portion 300. After being fitted, the denture hook 500 expands due to its own elasticity and is engaged with the large diameter portion 330.

In the process described above, the denture wearer can perceive that the puncture hooks 500 provided inside both ends of the denture 10 for intermediate missing teeth are simultaneously engaged with the denture support portion 300 as if they were transmitted through the mandible. This makes it possible to confirm that the denture has begun to be attached to the denture attachment portions at both ends in the proper and correct posture at the initial stage of denture attachment.

Subsequently, in the state where the denture is started to be attached in this way, as shown in FIGS. 21 (c), 22 (c-1), and 22 (c-2), the stab hook 500 is attached to the denture support portion 300. When the base end side curved tapered portion 340 is reached, the denture hook 500 in which the denture portion 520 is elastically expanded and deformed returns to its original shape.

The denture wearer can perceive the return of the deformation of the denture hook 500 again with his / her own sense through the mandible, and the denture is inserted into the magnetic material accommodating holes 145 of the magnetic material accommodating portion 140 at both ends of the denture 10 for intermediate missing teeth. It can be confirmed that the denture support portion 300 of the attachment portion is simultaneously housed in the correct position.

As a result, it is possible to prevent the denture 10 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends in an unfavorable orientation or state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

Subsequently, when the denture wearer occludes, the denture 10 for the intermediate missing tooth sinks until it is pressed against the gingiva 900, and in accordance with this, FIGS. 21 (d), 22 (d-1), and 22 (FIG. 22). As shown in d-2), the stab hook 500 stays at that position in a state where it slides by a predetermined amount while descending from the proximal end side curved taper portion 340 of the denture support portion 300 along the strut portion 350. The predetermined amount referred to here corresponds to the difference in the height direction (vertical direction) between the first space S1 shown in FIG. 18 and the second space S2 shown in FIG.

On the other hand, when removing the denture 10 for intermediate missing teeth, the denture 10 for intermediate missing teeth is removed through a process opposite to the mounting process of the intermediate missing tooth denture 10 described above.

As can be seen from the above description, it is possible to prevent the denture 10 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends of the denture 10 in an unfavorable state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

When the denture is occluded after being attached as described above, saliva D (dot-shaped as shown in FIG. 18) intervening in the entire lower surface of the denture base 120 before occlusal due to the occlusal force F that acts evenly on the denture 10 for the intermediate defective tooth. Of (see Part D), saliva D interposed between the entire denture base 120 and the gingiva 900 is extruded during occlusion, and the denture base 120 and the gingiva 900 come into close contact with each other without the intervention of saliva D (see Part D). (See the intervening position of the dot-shaped portion D shown in FIG. 19).

As described above, the denture base 120 pushes out saliva D by the occlusal force F at the time of occlusal and presses the gingiva 900 to sink the denture itself, and the denture support portion 300 is placed in the magnetic material accommodating portion 140. Slide up. Then, in a state where the denture support portion 300 is fully raised in the magnetic material accommodating portion 140, between the tip flat portion 310 of the denture support portion 300 and the hole bottom end surface portion 146 of the magnetic material accommodating hole 145 facing the denture support portion 300. As described above, the second space S2 is formed.

By leaving such a space, the denture support portion 300 can leave a margin for further slide rise in the magnetic material accommodating portion 140, and the occlusal force F is excessive in the implant portion of the implant 410 even if the tooth is strongly bitten. The third is to prevent the deterioration of the implant 410, the jawbone in which the implant 410 is embedded, or the periodontal ligament 421 of the residual root portion 420 progresses without crushing the periodontal ligament 421 of the residual root portion 420 without applying any force. It can be said that this is a feature of the embodiment.

Again, the advantage of the present embodiment having the magnetic material engaging portion 500, which is the above-described embodiment of the present invention, will be described. In the case of the present embodiment, when the two puncture-shaped magnetic material engaging portions 500 provided at both ends of the denture 10 for intermediate missing teeth attach the denture, the denture supporting portions 300 at both ends of the denture 10 for intermediate missing teeth It hits the tip-side curved tapered portion 320 almost at the same time, and while the denture 10 is attached, the puncture portion 520 spreads by elastic force along the large-diameter portion 330 of the denture support portion 300, and then the lower base end of the large-diameter portion 330. Engage with the side curved taper.

In this way, it is possible to simultaneously confirm the timing at which the puncture-shaped magnetic material engaging portion 500 is fitted into the denture attachment portions on the lower ends of both ends of the denture 10 for intermediate missing teeth of the wearer. That is, if the timing of fitting the magnetic material engaging portions 500 at both ends into the denture support portion 300 is shifted or only one of them is fitted, the wearer will experience the phenomenon with the sensation and engaging sound transmitted to the mandible. You can notice it immediately. This makes it possible to confirm whether the denture 10 for intermediate missing teeth is properly or improperly attached.

Here, if the denture is occluded after being improperly attached, the occlusal force F exerted on the denture 10 for the intermediate missing tooth does not go in the normal direction and causes an inappropriate stress or bending moment in the denture attachment portion, so that the implant 410 or There is a risk of damaging the periodontal ligament 421 of the residual root portion 420, but according to the present embodiment, such a situation can be avoided.

Further, when the denture 10 for intermediate missing teeth is attached to the denture mounting portion based on the implant 410 or the residual root portion 420, the denture 10 for intermediate missing teeth is held between the two denture support portions 300 by a magnetic tensile force. While doing so, the two implants 410 and the residual root portion 420 can be moved in parallel by a predetermined amount in the vertical direction (longitudinal direction) of the two implants 410 and the residual root portion 420. That is, the two denture support portions 300 are slidable in the magnetic material accommodating portion 140 of the denture 10 for intermediate missing teeth, respectively. This ensures that the denture is prevented from wobbling, coming off, or coming off with the sufficient magnetic force of the magnet 150 while the denture is being worn, and when the denture is being put on or taken off by being pinched with a finger and pushed in or pulled out. , The denture can be attached and detached smoothly.

Subsequently, a first modification of the third embodiment will be described. The denture and its attachment attachment according to the first modification of the third embodiment are latch-engaged in which the magnetic material engaging portion 600 can be moved in and out by elastic force at a predetermined position on the inner peripheral wall of the magnetic material accommodating portion 140. It is characterized by having the structure of. Specifically, in the first modification, the magnetic material engaging portion 600 includes a bearing latch engaging portion 600 in which a bearing 610, a shaft 620, and a spring 650 are combined.

FIG. 23 is a diagram for sequentially explaining a first modification in which the way of engaging the magnetic body engaging portion 600 and the denture supporting portion 300 with which the magnetic body engaging portion 600 is engaged in the third embodiment is different. Further, FIG. 24 is an explanatory view corresponding to FIG. 23, in which the left side shows a side view and the right side shows a plan view.

In each drawing, the positional relationship between the bearing latch engaging portions 600 at both ends of the denture 10 for intermediate missing teeth and the denture supporting portion 300 with which the bearing latch engaging portions 600 are engaged is shown at the timing of simultaneous occurrence in the process of mounting the denture.

In FIGS. 23 (a), 24 (a-1), and 24 (a-2), the tip flat portion 310 of the denture support portion 300 is aligned with the magnetic material accommodating holes 145 at both ends of the denture 10 for intermediate missing teeth. Then, the first step of attaching the denture 10 for the intermediate missing tooth to the denture attachment portion so that the tip flat portion 310 of the denture support portion 300 enters from the opening 141 of the magnetic material accommodating hole 145 is shown. It shows a state in which the latch engaging portion 600 (magnetic material engaging portion 600) is located slightly above the tip-side curved tapered portion 320 of the denture support portion 300.

Subsequently, in FIGS. 23 (b), 24 (b-1), and 24 (b-2), following the above-mentioned step, the bearing latch engaging portion 600 is connected to the tip-side curved tapered portion of the denture support portion 300. After engaging with 320, the spring 650 of the bearing latch engaging portion 600 contracts and the tip of the bearing is pressed against the large diameter portion 330.

In the above process, since the portion of the bearing latch engaging portion 600 that is pressed against the denture support portion 300 is composed of the bearing 610, the bearing 610 continues to make point contact with the denture support portion 300 while maintaining a rotational state. Then, the bearing latch engaging portion 600 reaches the large diameter portion 330 of the denture support portion 300 while being in smooth contact with the denture support portion 300.

In the process described above, the denture wearer may perceive that the bearing latch engaging portions 600 provided at both ends of the denture 10 for intermediate missing teeth are simultaneously engaged with the denture supporting portion 300 as if they were transmitted through the jawbone. This allows it to be confirmed at the initial stage of denture mounting that the denture has begun to be attached to the denture attachment portion located below both ends of the denture in a proper and correct posture.

Subsequently, in the state where the denture is started to be attached in this way, the bearing latch engaging portion 600 supports the denture as shown in FIGS. 23 (c), 24 (c-1), and 24 (c-2). When the portion 300 reaches the base end side curved tapered portion 340, the portions of the bearing 610 and the shaft 620 that have been retracted due to the elasticity of the spring 650 return to their original shapes.

The denture wearer can perceive the return of the elastic deformation of the bearing latch engaging portion 600 again with his / her own sense through the mandible, and the magnetic material accommodating portion 140 of the magnetic material accommodating portion 140 at both ends of the denture 10 for intermediate missing teeth. It can be confirmed that the denture support portion 300 of the denture attachment portion is simultaneously housed in the correct position in the hole 145.

As a result, it is possible to prevent the denture 10 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends in an unfavorable orientation or state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

Subsequently, when the denture wearer bites, the denture 10 for the intermediate missing tooth sinks until it is pressed against the gingiva 900, and in accordance with this, FIGS. 23 (d), 24 (d-1), and 24 (Fig. 24) As shown in d-2), the bearing latch engaging portion 600 stays at that position in a state where it slides by a predetermined amount while descending from the proximal end side curved tapered portion 340 of the denture support portion 300 along the strut portion 350. .. The predetermined amount referred to here corresponds to the difference in the height direction (vertical direction) between the first space S1 shown in FIG. 18 and the second space S2 shown in FIG.

On the other hand, when removing the denture 10 for intermediate missing teeth, the denture 10 for intermediate missing teeth is removed through a process opposite to the mounting process of the intermediate missing tooth denture 10 described above.

As can be seen from the above description, even in this first modification, it is possible to prevent the denture 10 for intermediate missing teeth from being forcibly attached to the denture attachment portions located below both ends of the denture 10 in an unfavorable state. As a result, it is characterized in that it effectively prevents adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevents adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

Subsequently, a second modification of the third embodiment will be described. In the denture and its attachment attachment according to the second modification of the third embodiment, the magnetic material engaging portion 700 is subjected to elastic force at a predetermined position on the inner peripheral wall of the magnetic material accommodating portion 140, as in the first modification. It is characterized by having a latch engagement structure that allows entry and exit. However, in the second modification, unlike the first modification, the magnetic material engaging portion 700 includes a shaft latch engaging portion 700 in which a shaft 720 having a spherical end portion 710 with a rounded tip and a spring 750 are combined. The feature is that the cost is reduced with a simpler configuration than the first modification.

FIG. 25 is a diagram for sequentially explaining how to engage the shaft latch engaging portion 700 and the denture support portion 300 with which the shaft latch engaging portion 700 according to the second modification is engaged. Further, FIG. 26 is an explanatory view corresponding to FIG. 25, in which the left side shows a side view and the right side shows a plan view.

In each drawing, the positional relationship between the shaft latch engaging portions 700 at both ends of the denture 10 for intermediate missing teeth and the denture supporting portion 300 with which the shaft latch engaging portions 700 are engaged is shown at the timing of simultaneous occurrence in the process of mounting the denture.

25 (a), 26 (a-1), and 26 (a-2) show that the tip flat portion 310 of the denture support portion 300 is aligned with the magnetic material accommodating holes 145 at both ends of the denture 10 for intermediate missing teeth. Then, the first step of attaching the denture 10 for the intermediate missing tooth to the denture attachment portion so that the tip flat portion 310 of the denture support portion 300 enters from the opening 141 of the magnetic material accommodating hole 145 is shown. It shows a state in which the latch engaging portion 700 is located slightly above the distal end side curved tapered portion 320 of the denture support portion 300.

Subsequently, in FIGS. 25 (b), 26 (b-1), and 26 (b-2), following the above-mentioned step, the shaft latch engaging portion 700 is connected to the tip-side curved tapered portion of the denture support portion 300. After engaging with 320, the spring 750 of the shaft latch engaging portion 700 is compressed and deformed, and the spherical end portion 710 at the tip of the shaft 720 is engaged with the large diameter portion 330.

In the process described above, the denture wearer may perceive that the shaft latch engaging portions 700 provided at both ends of the denture 10 for intermediate missing teeth are simultaneously engaged with the denture support portion 300 as if they were transmitted through the jawbone. This allows it to be confirmed at the initial stage of denture mounting that the denture has begun to be attached to the denture attachment portion located below both ends of the denture in a proper and correct posture.

Subsequently, in the state where the denture is started to be attached in this way, as shown in FIGS. 25 (c), 26 (c-1), and 26 (c-2), the shaft latch engaging portion 700 supports the denture. When the portion 300 reaches the base end side curved tapered portion 340, the shaft latch engaging portion 700 in which the portion of the shaft 720 is retracted due to the elasticity of the spring 750 returns to the original shape.

The denture wearer can perceive the return of the deformation of the shaft latch engaging portion 700 again with his / her own sense through the mandible, and the magnetic material accommodating holes of the magnetic material accommodating portion 140 at both ends of the denture 10 for intermediate missing teeth. It can be confirmed in 145 that the denture support portion 300 of the denture attachment portion is simultaneously housed in the correct position.

As a result, it is possible to prevent the denture 10 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends in an unfavorable orientation or state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

Subsequently, when the denture wearer bites, the denture 10 for the intermediate missing tooth sinks until it is pressed against the gingiva 900, and in accordance with this, FIGS. 25 (d), 26 (d-1), and 26 (Fig. 26) As shown in d-2), the shaft latch engaging portion 700 stays at that position in a state where it slides by a predetermined amount while descending from the proximal end side curved tapered portion 340 of the denture support portion 300 along the strut portion 350. .. The predetermined amount referred to here corresponds to the difference in the height direction (vertical direction) between the first space S1 shown in FIG. 18 and the second space S2 shown in FIG.

On the other hand, when removing the denture 10 for intermediate missing teeth, the denture 10 for intermediate missing teeth is removed through a process opposite to the mounting process of the intermediate missing tooth denture 10 described above.

As can be seen from the above description, even in this second modification, it is possible to prevent the denture 10 for intermediate missing teeth from being forcibly attached to the denture attachment portions located below both ends of the denture 10 in an unfavorable state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

Subsequently, the denture and its attachment attachment according to the third modification of the third embodiment will be described. In the denture and its attachment attachment according to the third modification, the magnetic material engaging portion 800 has a leaf spring 820 that can be deformed by elastic force at a predetermined position on the inner peripheral wall of the magnetic material accommodating portion 140 to support the denture 300. It protrudes by a predetermined length in the direction intersecting the sliding direction of.

The denture support portion 300 engages with and disengages the leaf spring 820 when the denture support portion 300 is inserted into and removed from the magnetic material accommodating portion 140.

FIG. 27 is a diagram for sequentially explaining the engagement between the leaf spring latch engaging portion 800 and the denture support portion 300 with which the leaf spring latch engaging portion 800 according to the third modification of the third embodiment is engaged. Further, FIG. 28 is an explanatory view corresponding to FIG. 27, in which the left side shows a side view and the right side shows a plan view.

In each drawing, the positional relationship between the leaf spring latch engaging portions 800 at both ends of the denture 10 for intermediate missing teeth and the denture supporting portion 300 with which the dentures are engaged is shown at the timing when they occur at the same time in the process of mounting the denture.

27 (a), 28 (a-1), and 28 (a-2) show that the tip flat portion 310 of the denture support portion 300 is aligned with the magnetic material accommodating holes 145 at both ends of the denture 10 for intermediate missing teeth. Then, the first step of attaching the denture 10 for intermediate missing teeth to the denture attachment portion so that the tip flat portion 310 of the denture support portion 300 enters from the opening 141 of the magnetic material accommodating hole 145 is shown. It shows a state in which the spring latch engaging portion 800 is located slightly above the distal end side curved tapered portion 320 of the denture support portion 300.

Subsequently, in FIGS. 27 (b), 28 (b-1), and 28 (b-2), following the above-mentioned step, the leaf spring latch engaging portion 800 is connected to the tip-side curved tapered portion of the denture support portion 300. After engaging with 320, the leaf spring latch engaging portion 800 shows a state in which the spring tip 821 of the leaf spring 820 bends upward due to its own elasticity and engages with the large diameter portion 330 (FIG. 28 (b). Refer to the leaf spring 820 shown by the solid line in -1)).

In the process described above, the denture wearer may perceive that the leaf spring latch engaging portions 800 provided at both ends of the denture 10 for intermediate missing teeth are simultaneously engaged with the denture supporting portion 300 as if they were transmitted through the jawbone. This allows it to be confirmed at the initial stage of denture mounting that the denture has begun to be attached to the denture attachment portion located below both ends of the denture in a proper and correct posture.

Subsequently, in the state where the denture is started to be attached in this way, as shown in FIGS. 27 (c), 28 (c-1), and 28 (c-2), the leaf spring of the leaf spring latch engaging portion 800. When the spring tip 821 of the 820 reaches the base end side curved tapered portion 340 of the denture support portion 300, the leaf spring latch engaging portion 800 that has been bent by the elasticity of the leaf spring 820 returns to the original shape.

The denture wearer can perceive the return of the deformation of the leaf spring latch engaging portion 800 again with his / her own sense through the mandible, and the magnetic material accommodating holes of the magnetic material accommodating portion 140 at both ends of the denture 10 for intermediate missing teeth. It can be confirmed in 145 that the denture support portion 300 of the denture attachment portion is simultaneously housed in the correct position.

As a result, it is possible to prevent the denture 10 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends in an unfavorable orientation or state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

Subsequently, when the denture wearer occludes, the denture 10 for the intermediate missing tooth sinks until it is pressed against the gingiva 900, and in accordance with this, FIGS. 27 (d), 28 (d-1), and 28 (FIG. 28). As shown in d-2), the leaf spring latch engaging portion 800 stays at that position in a state where the leaf spring latch engaging portion 800 slides by a predetermined amount while descending from the proximal end side curved tapered portion 340 of the denture support portion 300 along the strut portion 350. .. The predetermined amount referred to here corresponds to the difference in the height direction (vertical direction) between the first space S1 shown in FIG. 18 and the second space S2 shown in FIG.

On the other hand, when removing the denture 10 for intermediate missing teeth, the denture 10 for intermediate missing teeth is removed through a process opposite to the mounting process of the intermediate missing tooth denture 10 described above. At this time, the leaf spring 820 that engages with the large diameter portion 330 is in a state in which the spring tip 821 is bent downward as shown by the dotted line in FIG. 28 (b-1).

As can be seen from the above description, even in this third modification, it is possible to prevent the denture 10 for intermediate missing teeth from being forcibly attached to the denture attachment portions located below both ends of the denture 10 in an unfavorable state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

As described above, the magnetic material engaging portion 800 has the leaf spring 820, and the spring tip portion 821 of the leaf spring 820 engages with the artificial tooth support portion 300 (protruding portion) by utilizing the elastic force of the leaf spring 820. It is possible to exert the action of the present invention described below even if the structure is such that the spring is engaged or disengaged.

As described above, when the third embodiment and each modification thereof have the above configuration, a special action can be exhibited. Specifically, both ends of the denture 10 for intermediate missing teeth can slide in parallel with each denture support portion 300 with some play as described above, which is defined by this so-called play. The denture 10 for intermediate missing teeth can be moved only in the vertical direction.

This prevents the occurrence of problems that occur when the dentures are fixed to the denture support portions 300 at both ends with no play as in the conventional dentures for supporting both ends. That is, according to the present embodiment, the occlusal force F received from the opposite tooth at the time of upper and lower occlusal is not excessively applied to the denture for supporting both ends. As a result, the denture 10 is less likely to be damaged, the joint portion with the damaged denture support portion 300 does not damage the gingiva 900, and a part of the joint portion itself becomes a fragment and enters the mouth by mistake. It avoids the traditional problems of drinking.

Further, since the entire denture base of the denture is pressed against the entire gingiva at the time of occlusion and the denture sinks to absorb the occlusal force F, it is preferable to apply an excessive force to the embedded mandible. It prevents excessive stress from being generated in the portion of the periodontal ligament 421 of the implant 410 and the residual root portion 420.

As a result, the denture wearer can enjoy the comfortable wearing feeling and biting feeling of the denture 10 for intermediate missing teeth in occlusion. As a result, as described above, the person can continue to bite comfortably while biting the food, and can enjoy the meal without being stressed. As a result, good digestion and absorption of food can be achieved to maintain health and improve physical condition, which is especially important for the elderly.

Subsequently, the denture and its attachment attachment according to the fourth embodiment will be introduced. The denture and its attachment attachment according to the fourth embodiment relate to a periodontal ligament-bearing denture unlike the third embodiment. Here, the definition and technical significance of periodontal ligament-bearing dentures will be described.

Regarding the tooth tissue, the surface of the root of each tooth embedded inside the gingiva of the maxilla and the lower jaw is covered with hard cementum, and the periodontal ligament, which is a very hard fibrous connective tissue, makes the upper and lower jaws respectively. It is connected to the bone around the root of the tooth.

Since each tooth has such a tissue, as explained above with specific numerical values, it is possible to chew food while enduring an extremely large occlusal force F.

In the case of a person who has a habit of biting strongly from a young age or a person whose periodontal ligament itself is not originally strong, the above-mentioned large occlusal force F is applied to the periodontal ligament for many years, and the periodontal ligament itself is compressed and damaged. It causes absorption, causing tooth agitation and tooth loss as the age increases.

Therefore, a person who has a habit of biting a tooth strongly attaches the mucous membrane-bearing denture introduced in the third embodiment and its modified example to the defective tooth portion, and at the time of occlusal, the occlusal force is as unreasonable as possible on the residual root of the denture. Prevent F from acting, minimize the progression of periodontal ligament damage in the residual root, and do not lead to further loss of the residual root, which is essential for attaching dentures, especially when the number of residual roots is reduced. It is good to make it.

That is, in the case of such a denture wearer, especially when the number of missing teeth increases, the third embodiment and each of them so that the periodontal ligament of the remaining residual root portion is not damaged in the artificial tooth attached to the residual root portion. It is better to use the mucosal burden type denture introduced in the modified example.

On the other hand, those who do not have the above-mentioned strong biting habit when eating or those who have a strong constitution of the periodontal ligament itself generally keep the periodontal ligament in a healthy state even as they get older. Even if the periodontal ligament of the part is damaged and the tooth is missing, the number of missing teeth is small and there are many remaining teeth. In such a person, even when a denture is attached to a missing tooth, the periodontal ligament at the residual root is sound and there are many remaining teeth, so that the occlusal force F can be dispersed to each remaining tooth while occlusal. From the viewpoint, instead of using the mucous membrane-bearing denture according to the third embodiment and its modified example, it is preferable to use the periodontal ligament-bearing denture according to the fourth embodiment and its modified example.

Further, even if a person has a strong habit of biting, if there are many remaining teeth, the occlusal force F can be dispersed to each remaining tooth for the same reason as described above, so that the case of the third embodiment can be used. Unlike this, a periodontal ligament-bearing denture may be attached to the residual root. Even in this way, the periodontal ligament-bearing denture once attached can be used for a long period of time if the habit of strongly biting is eliminated.

In this way, it can be said that it will be important in the future to improve the quality of life in the aging society in recent years by properly using periodontal ligament-bearing dentures and mucosa-bearing dentures according to the situation. Then, on the premise that a periodontal ligament-bearing denture is used in the fourth embodiment of the present invention and each modification thereof, the configuration peculiar to the present invention will be described together with this effect in the following embodiments and modifications thereof. I will go.

In the following fourth embodiment and the description of the modified examples thereof, each component is also shown in the drawings, but the shape and dimensions of each component in each drawing are the third embodiment and its modifications. As with each variant, they are not exactly matched. This is because, of course, all the differences in these shapes and dimensions are included in the scope of the present invention, and therefore, they are intentionally made different for convenience of explanation. Therefore, it should be added that the difference in the shape and dimensional relationship of each component in each drawing does not affect the scope of the present invention at all.

Further, in the description related to each drawing, the vertical direction is defined based on the direction in which the upper side is the artificial tooth (denture body) side of the denture and the lower side is the denture base side. Therefore, when the denture is attached to the upper jaw, the hierarchical relationship described below is reversed. Further, the plan view is a state viewed from the tip side of the denture. In addition, parts that should be hatched in the drawings are omitted as appropriate to facilitate understanding of the explanation.

Hereinafter, the denture and its attachment attachment according to the fourth embodiment of the present invention will be described in detail with reference to the drawings. The configuration common to the denture and the attachment attached to the denture according to the third embodiment is designated by a common reference numeral in the drawings, and detailed description thereof will be omitted.

FIG. 29 is an explanatory view showing a mounting state of the denture and its mounting attachment according to the fourth embodiment of the present invention. Further, FIG. 30 is an explanatory view showing a state in which the denture shown in FIG. 29 is attached and then occluded.

As a feature peculiar to this fourth embodiment, when viewed with the denture 20 for intermediate missing teeth attached, the upper end portion of the denture support portion 300 is the bottom end surface of the magnetic material accommodating hole 245 of the magnetic material accommodating portion 240, respectively. It is mentioned that it is in contact with the portion 246. More specifically, when the denture 20 for intermediate missing teeth is attached, the bottom end surface portion 246 of the magnetic material accommodating hole 245 and the tip flat portion 310 of the denture support portion 300 facing the hole bottom end surface portion 246 abut. It has a structure in which it comes into contact with each other while maintaining a surface contact state.

As a result, as is clear from a comparison between FIGS. 29 and 30, the state before and during the occlusion with the denture attached are the same in the height direction of the denture, unlike the third embodiment. There is a structural feature of this fourth embodiment in that respect.

That is, in the fourth embodiment, the denture 20 for the intermediate missing tooth is not pressed against the gingiva 900 at the time of occlusion, and the occlusal force F is applied to the two implants of the denture attachment portion located at both ends of the denture 20 for the intermediate missing tooth. It is firmly attached to the 410 or is evenly received by the periodontal ligament 421 of the two residual roots 420.

Further, in the fourth embodiment, the magnetic material engaging portion 500 is provided at a predetermined position on the inner peripheral wall of the magnetic material accommodating portion 240 and can be expanded by elastic deformation, as in the third embodiment. It consists of an engaging hook, that is, a crotch hook. Then, when the denture is attached or detached, the stab hook expands due to elastic deformation, and the engagement between the stab hook and the denture support portion 300 is released.

Further, while the denture is attached, the stab hook engages with the predetermined position of the denture support portion 300 to prevent the denture support portion 300 from unexpectedly coming off or falling off from the magnetic material accommodating portion 240.

A method of engaging the magnetic body engaging portion 500 and the denture support portion 300 with which the magnetic body engaging portion 500 is engaged in the fourth embodiment by diverting a part of FIGS. 21 and 22 used in the third embodiment below. Will be explained in order.

The sasumata hook 500 shown in FIGS. 21 (a), 22 (a-1), and 22 (a-2) is located slightly above the tip-side curved tapered portion 320 of the denture support portion 300. , FIG. 21 (b), FIG. 22 (b-1), and FIG. 22 (b-2), after engaging the magnetic material engaging portion 500 with the tip-side curved tapered portion 320 of the denture support portion 300, piercing. The stab portion 520 of the hook 500 expands due to its own elasticity to reach a state of being engaged with the large diameter portion 330.

In this process, as in the third embodiment, the denture wearer feels that the denture hooks 500 provided at both ends of the denture 20 for intermediate missing teeth are simultaneously engaged with the denture support portion 300 with the feeling of being transmitted through the mandible. It can be perceived, which confirms that the denture has begun to attach to the denture attachment located below both ends in the correct correct posture at the initial stage of denture attachment.

Subsequently, the puncture hook 500 shown in FIGS. 21 (c), 22 (c-1), and 22 (c-2) reaches the base end side curved tapered portion 340 of the artificial tooth support portion 300, whereby the magnetic material is engaged. The piercing magnetic material engaging portion 500, which has been expanded and deformed by the elasticity of the joint portion 500, returns to its original shape.

The denture wearer can perceive the return of the deformation of the denture hook 500 again with his / her own sense through the mandible, and the denture is inserted into the magnetic material accommodating holes 245 of the magnetic material accommodating portion 240 at both ends of the denture for intermediate missing teeth 20. It can be confirmed that the denture support portion 300 of the attachment portion is simultaneously housed in the correct position.

As a result, it is possible to prevent the denture 20 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends in an unfavorable orientation or state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

In the fourth embodiment, the state shown in FIGS. 21 (d), 22 (d-1), and 22 (d-2) is not reached, and the upper end of the denture support portion 300 is shown in FIG. 29. As shown above, it abuts on the bottom end surface portion 246 of the magnetic material accommodating hole 145 and maintains the state shown in FIGS. 21 (c), 22 (c-1), and 22 (c-2).

Then, in the subsequent occlusion process, as shown in FIGS. 29 to 30, the denture attachment portions located at both ends of the denture 20 for intermediate missing teeth, that is, the implant 410 and the residual root portion 420 firmly embedded in the jawbone and the soundness. The occlusal force F is taken care of by the periodontal ligament 421, and the denture 20 for intermediate missing teeth does not sink toward the gingiva 900 as in the third embodiment, and the state shown in FIG. 30 is maintained.

As described above, also in the fourth embodiment, as in the third embodiment, the magnetic material engaging portion 500 has a crotch shape and is composed of a hook that can be expanded by elastic deformation by elastic force, and this hook is a denture. It is characterized by having a structure that engages with and disengages from the support portion 300 (protruding portion).

Further, each magnet 150 provided in the denture 20 for intermediate missing teeth exerts a magnetic tensile force on the denture supporting portion 300 provided near each of them, so that the denture 20 for intermediate missing teeth 20 has two implants 410 and a residual root portion 420. I try not to come off.

Then, the denture support portion 300 enters the magnetic material accommodating hole 245 provided in the magnetic material accommodating portion 240 and abuts against the hole bottom end face portion 246 of this hole, so that the denture for intermediate missing tooth 20 sandwiches both ends of the denture mounting portion. It is firmly attached to the two implants 410 or to the two residual roots 420 via the respective periodontal ligament 421.

That is, the hole bottom end face portion 246 of the magnetic material accommodating hole 245 serves as a stopper for attaching the denture when the denture support portion 300 slides and moves inside the magnetic material accommodating hole 245 when the denture is mounted. Then, in the case of correctly attaching the denture, when the denture 20 for the intermediate missing tooth is attached to the denture support portion 300, the denture is supported on the bottom end surface portion 246 of the magnetic material accommodating hole 245 formed at both ends of the denture for the intermediate missing tooth 20. The tip flat portion 310 of the portion 300 abuts at the same time. In this way, the hole bottom end face portion 246 serves as a stopper for attaching the denture, so that the occlusal force F at the time of occlusal is applied to the two implants 410 and the two implants of the denture attachment portion located at both ends of the denture 20 for the intermediate missing tooth. Disseminate evenly to the remaining roots 420.

By having such a structure, when the periodontal ligament-bearing type denture is attached and occluded, the occlusal force F is evenly applied between the denture and the denture support portion 300. As a result, stress concentration of the occlusal force F can be avoided at the time of occlusal, and damage to the denture and the denture support portion 300 is prevented. Further, since the occlusal force F is directly transmitted to the healthy residual root portion 420 of the implant 410 or the periodontal ligament 421, the denture 20 for the intermediate missing tooth does not sink toward the gingiva 900 at the time of occlusal, and the occlusal force F is firmly transmitted. Gives the denture wearer a comfortable bite.

Further, when the denture 20 for intermediate missing teeth is attached to the denture mounting portion based on the implant 410 or the residual root portion 420, the denture 20 for intermediate missing teeth is held between the two denture support portions 300 by a magnetic tensile force. While doing so, the two implants 410 and the residual root portion 420 can be moved in parallel by a predetermined amount in the vertical direction (longitudinal direction) of the two implants 410 and the residual root portion 420. That is, the two denture support portions 300 are slidable in the magnetic material accommodating portion 240 of the denture 20 for intermediate missing teeth, respectively. This ensures that the denture is prevented from wobbling, coming off, or coming off with the sufficient magnetic force of the magnet 150 while the denture is being worn, and when the denture is being put on or taken off by being pinched with a finger and pushed in or pulled out. , The denture can be attached and detached smoothly.

Subsequently, a part of FIGS. 23 and 24 used in the third embodiment is diverted to the bearing latch engaging portion 600 (magnetic material engaging portion 600) in the first modification of the fourth embodiment. How to engage with the denture support portion 300 to which this engages will be described in order.

The bearing latch engaging portion 600 shown in FIGS. 23 (a), 24 (a-1), and 24 (a-2) is located slightly above the tip-side curved tapered portion 320 of the denture support portion 300. From this state, the magnetic material engaging portion 600 shown in FIGS. 23 (b), 24 (b-1), and 24 (b-2) was engaged with the tip-side curved tapered portion 320 of the denture support portion 300. After that, the spring 650 of the bearing latch engaging portion 600 contracts, and the tip of the bearing 610 is pressed against the large diameter portion 330.

In the above process, as in the third embodiment, the portion of the bearing latch engaging portion 600 that is pressed against the denture support portion 300 is composed of the bearing 610, so that the bearing 610 rotates on the denture support portion 300. By continuing point contact while maintaining the state, the bearing latch engaging portion 600 can maintain a state of smooth contact with the denture support portion 300.

In this process, as in the third embodiment, the denture wearer informs the mandible that the bearing latch engaging portions 600 provided at both ends of the denture for intermediate missing teeth 20 are simultaneously engaged with the denture supporting portion 300. It can be perceived as a transmitted sensation, which confirms that the denture has begun to be attached to the denture attachment portion located below both ends in a normal and correct posture at the initial stage of denture attachment.

Subsequently, the bearing latch engaging portion 600 shown in FIGS. 23 (c), 24 (c-1), and 24 (c-2) reaches the proximal end side curved tapered portion 340 of the denture support portion 300. The parts of the bearing 610 and the shaft 620 that were retracted due to the elasticity of the spring 650 return to their original shapes.

The denture wearer can perceive the return of the elastic deformation of the bearing latch engaging portion 600 again with his / her own sense through the mandible, and the magnetic material accommodating portion 240 at both ends of the denture for intermediate missing teeth 20. It can be confirmed that the denture support portion 300 of the denture attachment portion is simultaneously housed in the correct position in the hole 245.

As a result, it is possible to prevent the denture 20 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends in an unfavorable orientation or state. As a result, it is possible to effectively prevent adverse effects on the implant 410, which is the denture attachment part, due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420, which is also the denture attachment part, and the periodontal ligament 421 around it. ..

In the fourth embodiment, the state shown in FIGS. 23 (d), 24 (d-1), and 24 (d-2) is not reached at the time of occlusion, and the upper end of the denture support portion 300 is shown in FIG. 29. As shown in FIG. 23 (c), the magnetic material accommodating hole 145 abuts at the end on the implementation tip side, and the state shown in FIGS. 23 (c), 24 (c-1), and 24 (c-2) is maintained.

Then, in the subsequent occlusal process, the occlusal force F is handled by the denture attachment portions located at both ends of the denture 20 for intermediate missing teeth, that is, the implant 410 and the residual root portion 420 firmly embedded in the mandible, and the sound periodontal ligament 421. , The state shown in FIG. 30 is maintained without the denture 20 for intermediate missing teeth sinking toward the gingiva 900 as in the third embodiment. As a result, as described above, the denture wearer is given a firm biting comfort at the time of occlusion.

Subsequently, a part of FIGS. 25 and 26 used in the third embodiment is diverted to the shaft latch engaging portion 700 (magnetic material engaging portion 700) in the second modification of the fourth embodiment. How to engage with the denture support portion 300 to which this engages will be described in order.

The shaft latch engaging portion 700 shown in FIGS. 25 (a), 26 (a-1), and 26 (a-2) is located slightly above the tip-side curved tapered portion 320 of the denture support portion 300. From this state, the magnetic material engaging portion 700 shown in FIGS. 25 (b), 26 (b-1), and 26 (b-2) was engaged with the tip-side curved tapered portion 320 of the denture support portion 300. After that, the spring 750 of the shaft latch engaging portion 700 is compressed and deformed, and the spherical end portion 710 at the tip of the shaft 720 is engaged with the large diameter portion 330.

In this process, as in the third embodiment, the denture wearer simultaneously engages the spherical end portions 710 of the shaft latch engaging portions 700 provided at both ends of the denture for intermediate missing teeth 20 with the denture support portion 300. At the initial stage of denture mounting, it is possible to perceive what has been done as if it were transmitted through the mandible, so that the denture is beginning to be attached to the denture attachment part located below both ends in the correct posture. You can check.

Subsequently, the spherical end portion 710 of the shaft latch engaging portion 700 shown in FIGS. 25 (c), 26 (c-1), and 26 (c-2) is the proximal end side curved tapered portion of the denture support portion 300. When it reaches 340, the shaft latch engaging portion 700 in which the shaft 720 portion is retracted due to the elasticity of the spring 750 returns to its original shape.

The denture wearer can perceive the return of the deformation of the shaft latch engaging portion 700 again with his / her own sense through the mandible, and the magnetic material accommodating holes of the magnetic material accommodating portion 240 at both ends of the denture 20 for intermediate missing teeth. It can be confirmed in 245 that the denture support portion 300 of the denture attachment portion is simultaneously housed in the correct position.

As a result, it is possible to prevent the denture 20 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends in an unfavorable orientation or state. As a result, it is possible to effectively prevent adverse effects on the denture attachment portion and the implant 410 due to excessive force or moment applied forcibly, and prevent adverse effects on the residual root portion 420 and the periodontal ligament 421 around it.

Even in this second modification, the upper end of the denture support portion 300 does not reach the state shown in FIGS. 25 (d), 26 (d-1), and 26 (d-2) at the time of occlusion. However, as shown in FIG. 29, it abuts against the end of the magnetic material accommodating hole 145 on the implementation tip side, and maintains the state shown in FIGS. 25 (c), 26 (c-1), and 26 (c-2).

Then, in the subsequent occlusal process, the occlusal force F is handled by the denture attachment portions located at both ends of the denture 20 for intermediate missing teeth, that is, the implant 410 and the residual root portion 420 firmly embedded in the mandible, and the sound periodontal ligament 421. , The state shown in FIG. 30 is maintained without the denture 20 for intermediate missing teeth sinking toward the gingiva 900 as in the third embodiment. This gives the denture wearer a firm bite during occlusion.

Subsequently, a part of FIGS. 27 and 28 used in the third embodiment is diverted to the leaf spring latch engaging portion 800 (magnetic material engaging portion 800) in the third modification of the fourth embodiment. How to engage with the denture support portion 300 to which this engages will be described in order.

The leaf spring latch engaging portion 800 shown in FIGS. 27 (a), 28 (a-1), and 28 (a-2) is located slightly above the tip-side curved tapered portion 320 of the denture support portion 300. From this state, the magnetic material engaging portion 800 shown in FIGS. 27 (b), 28 (b-1), and 28 (b-2) was engaged with the tip-side curved tapered portion 320 of the denture support portion 300. After that, the spring tip 821 of the leaf spring 820 of the leaf spring latch engaging portion 800 bends upward and engages with the large diameter portion 330.

In this process, as in the third embodiment, the denture wearer informs the mandible that the leaf spring latch engaging portions 800 provided at both ends of the denture 20 for intermediate missing teeth are simultaneously engaged with the denture support portion 300. It can be perceived as a transmitted sensation, which confirms that the denture has begun to be attached to the denture attachment portion located below both ends in a normal and correct posture at the initial stage of denture attachment.

Subsequently, the leaf spring latch engaging portion 800 shown in FIGS. 27 (c), 28 (c-1), and 28 (c-2) reaches the proximal end side curved tapered portion 340 of the denture support portion 300. The leaf spring latch engaging portion 800 in which the spring tip 821 of the leaf spring 820 is bent due to elasticity returns to the original shape.

The denture wearer can perceive the return of the deformation of the leaf spring latch engaging portion 800 again with his / her own sense through the mandible, and the magnetic material accommodating holes of the magnetic material accommodating portion 240 at both ends of the denture 20 for intermediate missing teeth. It can be confirmed in 245 that the denture support portion 300 of the denture attachment portion is simultaneously housed in the correct position.

As a result, it is possible to prevent the denture 20 for intermediate missing teeth from being forcibly attached to the denture attachment portion located below both ends in an unfavorable orientation or state. As a result, it is possible to prevent adverse effects on the implant 410, which forms the base of the denture attachment part, due to excessive force or moment applied forcibly, and adversely affect the residual root portion 420, which also forms the base of the denture attachment part, and the periodontal ligament 421 around it. Effectively show the prevention of.

In the fourth embodiment, the state shown in FIGS. 27 (d), 28 (d-1), and 28 (d-2) was not reached at the time of occlusion, and the upper end of the denture support portion 300 was formed in FIG. 29. As shown in FIG. 27 (c), the magnetic material accommodating hole 145 abuts on the distal end side, and the state shown in FIGS. 27 (c), 28 (c-1), and 28 (c-2) is maintained.

Then, in the subsequent occlusal process, the occlusal force F is handled by the denture attachment portions located at both ends of the denture 20 for intermediate missing teeth, that is, the implant 410 and the residual root portion 420 firmly embedded in the mandible, and the sound periodontal ligament 421. , The state shown in FIG. 30 is maintained without the denture 20 for intermediate missing teeth sinking toward the gingiva 900 as in the third embodiment. This gives the denture wearer a firm bite during occlusion.

Since the fourth embodiment and each modification thereof have the above-described configuration, as described above, the denture wearer who has no habit of firmly implanting the implant 410 in the mandible and having a strong occlusion and the root of the residual root portion 420. For a denture wearer with a healthy membrane 421, each time the denture is occluded, the denture 20 for intermediate missing teeth can be comfortably worn and bitten. As a result, as described above, the person can continue to bite comfortably while biting the food, and can enjoy the meal without being stressed.

As a result, good digestion and absorption of food can be achieved to maintain health and improve physical condition, which is especially important for the elderly. In addition, it is possible to enjoy daily meals and maintain or improve the quality of life due to the chewing comfort that does not make people aware that they are wearing dentures.

In each of the above-described embodiments and modifications thereof, after the denture for intermediate missing teeth is attached to the denture attachment portion, the magnetic material engaging portion engages with the denture support portion and the denture can be easily removed from the denture attachment portion. For example, it is preferable to define the engaging force of the magnetic material engaging portion as follows in order to exert the effect of preventing the magnetic material from coming off.

Specifically, when a denture wearer wears a denture and eats foods that easily adhere to the teeth, such as rice cake, gum, gummies, and caramel, the denture sticks to these and the denture itself unexpectedly comes off. It is advisable to require a minimum amount of engaging force that does not exist, and to limit the engaging force so that it can be easily disengaged when the denture wearer grasps and pulls it with the fingers of the hand when removing the denture.

Further, in each of the above-described embodiments and modifications thereof, the timing at which the magnetic material engaging portions provided near both ends of the denture for intermediate missing teeth engage with the denture support portion and the magnitude of the engaging force are as follows. It is preferable that the contents are as follows.

Specifically, at the initial stage of attaching the denture for the intermediate missing tooth to the denture attachment portion, each magnetic material engaging portion provided on both sides of the denture for the intermediate missing tooth holds the denture for the intermediate missing tooth in the correct position, orientation, and posture. Only when trying to attach, each of the two magnetic material engaging parts contacts and engages with the two corresponding denture support parts at the same time, and this state causes the denture to be attached via the jawbone. It is good to make it recognizable.

As a result, it is possible to prevent damage to the denture attachment portions at both ends due to, for example, a wedge effect, which is caused by forcibly mounting the denture for the intermediate missing tooth in a state where the direction is slanted. This is especially effective for those who are new to dentures and who are unfamiliar with how to wear dentures or who have dull fingertip sensations and are unable to make fine fingertip movements.

Next, when the denture for the intermediate missing tooth is positioned at the correct position and started to be mounted, a large elastic force is generated by the magnetic material engaging portion engaging with the large diameter portion of the denture support portion as described above. By making it possible to perceive this sensation when pushing the denture with the denture wearer's finger as resistance and to perceive this condition through the jawbone, both ends of the denture for intermediate missing teeth It is preferable to be able to recognize that the engaged state is progressing at the same timing.

As a result, the denture wearer can know that the denture for the intermediate missing tooth is being worn at the correct angle, orientation and posture, and can give a sense of security.

Next, in a state where the denture for the intermediate missing tooth is completely attached to the denture attachment portion, the magnetic material engaging portion passes through the large diameter portion of the denture attachment portion and reaches the base end side small diameter portion as described above. At this time, it is possible to recognize through the mandible whether the engaging force exerted by each of the two magnetic material engaging portions on the two denture support portions corresponding to each of them weakens or is released at the same timing. It is good to make it.

In order to recognize this sensation at both ends of the denture for intermediate missing teeth at the same time, the elastic force acting on the two denture support parts corresponding to each of the two magnetic body engaging parts changes at the same time, and this is applied to the denture wearer. It is good to be able to recognize it.

As a result, the denture wearer can confirm that the denture for the intermediate missing tooth is attached to the denture attachment portions at both ends in the correct orientation posture, and can give the wearer a sense of security. In this way, the magnetic material engaging portion can recognize the timing of how to engage with the denture support portion at both ends of the denture for intermediate missing teeth via the mandible, so that the denture can be attached. The person can confirm that he / she was able to properly attach the denture with his / her own hands.

Also, when removing the denture, the operation is the opposite, so make sure that the denture is removed correctly without applying excessive force to both ends of the denture for intermediate missing teeth or the denture attachment part that sandwiches it. Is possible.

Especially for elderly people who have a dull feeling of their hands, by making it possible to recognize the timing when the magnetic material engaging part engages with the denture support part through the mandible, the denture is damaged for a long period of time. The denture for intermediate missing teeth can be used for a long period of time without causing any adverse effect on the denture attachment portions at both ends of the denture.

For elderly people who need special care, changing clothes can be helped by the caregiver, but dentures must be attached and detached in the mouth with very precise positioning and orientation. As described above, one or both of the denture and the denture attachment portion are damaged, so it is very difficult for the caregiver to help with it, and it can be said that it is not preferable for care.

Therefore, in the reality that the denture wearer needs to wear the denture by himself / herself as in the present invention, having the structure as in the present invention makes it possible to continue using the denture for a long period of time. The present invention has the merits of.

Finally, additional modifications of the above-described embodiments included in the scope of the present invention will be described. In the first and fourth embodiments described above and various modifications thereof, the denture support portion basically has a cylindrical shape, and the distal end side curved tapered portion, the large diameter portion, and the proximal end side curved tapered portion. Although it was composed of stanchions, it does not have to be limited to such a cylindrical shape, and a part of the circle seen from the tip surface side is cut off and a part of it faces the longitudinal direction (axial direction). It may extend in a plane shape and slide with respect to the slide guide flat surface portion provided in the magnetic material accommodating hole. In this case, if the magnetic material engaging portion does not interfere with the inner peripheral surface of the magnetic material accommodating hole, the operation of the present invention can be sufficiently exerted.

Further, as described above, the denture support portion basically has a cylindrical shape, but has a semicircular shape in terms of end face, a rice ball shape such that the entire surface is curved, and rounded corners and outer peripheral surfaces. A quadrangle or polygonal shape may be used as the basic configuration. In this case, if it has a slide guide flat surface portion corresponding to this and has a magnetic material accommodating hole that does not interfere with the magnetic material engaging portion, it naturally belongs to the scope of the present invention.

Further, for example, at least a part of the elastic body of the magnetic material engaging portion is made of a shape memory alloy, and after the intermediate missing tooth is attached, the elastic force is weakened by the temperature in the oral cavity and the shape is deformed to increase the rigidity. Such a modified form is also conceivable. Specifically, when the denture is attached, the elastic force of the magnetic material engaging portion becomes an appropriate amount of elastic force, and after the artificial tooth is attached, the elastic force of the magnetic material engaging portion is strengthened and the denture is difficult to come off. When removing the denture, pull it slightly with your fingertips to remove it, or by including water in the mouth to lower the temperature of the magnetic material engaging part, the elastic force is returned to an appropriate size and the denture can be easily removed. The form to do is conceivable.

In this case, for example, with respect to the magnetic material engaging portion in the third embodiment and the fourth embodiment, a form in which the piercing portion is formed by using a shape memory alloy can be considered. Further, in the second modification and the third modification of each embodiment, it is conceivable that a spring made of a shape memory alloy can be used to change this elastic force so as to exert the above-mentioned action. Further, in the fourth modification in each embodiment, it is conceivable to use a shape memory alloy for the leaf spring itself and change its shape so that its elastic force changes so as to exert the above-mentioned action. Be done.

Finally, the advantages of the dentures for intermediate missing teeth (hereinafter, appropriately referred to as "dentures") according to each embodiment of the present invention and each modification described above will be reconfirmed. According to the denture for intermediate missing teeth according to the present invention, only when the latch engaging portions provided at both ends of the denture are engaged with the denture support portion at the same timing when the denture is attached to the denture support portion. It can be confirmed that the denture is properly positioned for mounting.

As a result, for example, a serious situation that occurs when the denture for an intermediate missing tooth is positioned in an inclined state and then pushed in or occluded as much as possible, specifically, a denture with a posture or orientation that cannot normally occur. By applying a lateral component force that cannot normally occur to the tip of the denture support according to the fit of the denture, the denture is applied to the implant implant of the denture attachment and the periodontal ligament of the residual root. However, it is possible to avoid generating an excessive moment that cannot occur in the normal mounting state. As a result, it is possible to avoid the destruction of the residual root portion due to the breakage of the implant portion and the peeling of the periodontal ligament of the residual root portion.

In addition, by positioning the denture for the intermediate missing tooth in the normal state and then pushing it with a finger or slowly biting it, the denture for the intermediate missing tooth is completely fitted to each of the denture supports on both ends in the normal state. The denture can be confirmed by simultaneously weakening or releasing the engaging force of the latch engaging portion engaged with each of these denture support portions.

As a result, for example, the denture does not fit into the denture support portion in a halfway state, and the tooth is three-dimensionally formed with a step between the denture for the intermediate missing tooth and the teeth on both sides sandwiching the denture. It is possible to avoid serious situations that occur when biting with complicated movements.

Specifically, when the opposite tooth applies an unreasonable lateral force to the denture for the intermediate missing tooth, the denture is normally attached to the implant embedding part of the denture attachment part and the periodontal ligament of the residual root part. It is not necessary to generate an excessive moment that cannot occur. As a result, the destruction of the residual root portion due to the breakage of the implant portion and the peeling of the periodontal ligament of the residual root portion can be avoided by using the denture for intermediate missing teeth according to the present invention.

Similarly, a lateral force that cannot occur during normal occlusion is applied to the tips of healthy teeth on both sides of the denture, and based on this, an excessive moment is applied to the periodontal ligament of the healthy tooth. By using the denture for intermediate missing teeth according to the present invention, it is possible to avoid the occurrence of a serious problem that occurs and causes the healthy periodontal ligament to be peeled off.

Even with a structure like each of the modified examples described above, the action of the denture and its attachment attachment according to the present invention for attaching the denture for intermediate missing teeth can be sufficiently exerted.

It should be noted that the above-described embodiment and each modification thereof are merely illustrative of the present invention, and the shape, dimensions, and material thereof can be appropriately changed as long as they do not deviate from the scope of the present invention. Needless to say.

Subsequently, an embodiment of the present invention (hereinafter, referred to as “the present embodiment”) will be described.

The present embodiment is a combination of the above-mentioned related embodiments, and comprises the first embodiment and the second embodiment. In the first embodiment, the protrusions are similar to those of the first related embodiment. The elastic member disclosed in the third related embodiment is provided so that the free end denture fits in the groove of the grooved engaging portion and is firmly attached to the abutment tooth, that is, does not come off due to force majeure after attachment. It has a form provided inside the main body of the denture. That is, it is characterized in that the protruding portion stays in the groove formed in the grooved engaging portion while the denture is mounted by utilizing the elastic force of the elastic engaging portion provided on the denture. ..

Further, in the second embodiment, the protrusion is accommodated in the accommodating recess as in the second related embodiment, and the free end denture remains firmly attached to the abutment tooth, that is, after the free end denture is attached. It has a form in which the elastic member disclosed in the third related embodiment is provided in the main body of the free end denture so as not to come off due to force majeure. That is, it is characterized in that the protruding portion stays in the groove formed in the grooved engaging portion while the denture is mounted by utilizing the elastic force of the elastic engaging portion provided on the denture. ..

First, the first embodiment will be described. The first embodiment is a denture and its attachment attachment for attaching a free end denture to a single abutment tooth.

The mounting attachment has a metal crown to be attached to the one abutment tooth and a protruding portion made of a magnetic material provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved. ..

Further, the protruding portion has a substantially spherical shape or a substantially hemispherical shape.

Further, the denture is composed of a free end denture, and the free end denture is attached to at least one denture body attached adjacent to the abutment tooth, a denture base supporting the denture body, and the abutment tooth. The grooved engaging portion arranged on the adjacent end side and the grooved engaging portion when viewed in the mounted state of the denture at a position inside the free end denture and adjacent to the grooved engaging portion. It has a magnet arranged at a position opposite to the abutment tooth.

Further, the groove formed in the grooved engaging portion extends in the direction connecting the denture base and the denture body, and the groove portion is formed in the grooved engaging portion in the direction from the denture base to the denture main body. Is formed, and the protruding portion protrudes from the side surface of the metal crown in a direction in which the denture can be engaged in the groove portion of the grooved engaging portion when viewed in the mounted state of the denture, and the free end denture is mounted on the abutment. When viewed in a state of being attached to the teeth, the protruding portion engages with the groove portion of the grooved engaging portion, so that the free end denture is connected to the abutment tooth and the denture base of the free end denture is formed. By contacting the gingival, the free end denture is attached to the abutment tooth, and the magnet exerts a magnetic tensile force on the protruding portion made of the magnetic material to cause the free end denture to support the support. In a state where the free end denture is attached to the abutment tooth without being separated from the denture, the protruding portion can move along the groove while applying a magnetic tensile force to the protruding portion. In a state where the protruding portion remains at a predetermined position in the extending direction of the groove portion, the extending direction of the free end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth. The groove is provided with a recessed protrusion-like retaining portion at the denture base side end of the groove to prevent the protrusion from coming off the groove when the denture is attached, and the teeth of the groove are provided. The distal end is closed by a part of the denture, and the free end denture is attached to the abutment tooth to occlude, and the denture base is pressed against the denture and sinks by receiving an occlusal force. In this state, the protruding portion does not hit the end on the tooth tip side, the two are separated by a certain space, and further, the elastic force of the elastic engaging portion provided on the denture is utilized. The denture is characterized in that the protruding portion stays in the groove formed in the grooved engaging portion during mounting.

Subsequently, a modified example of the first embodiment will be described. A modification of the first embodiment is a denture for attaching a free end denture to one abutment tooth and an attachment thereof, wherein the attachment attachment is a metal crown attached to the one abutment tooth and the said attachment. It has a protrusion made of a magnetic material provided at a predetermined position around the metal crown and at least a part of the peripheral surface is curved, the protrusion has a substantially spherical or substantially hemispherical shape, and the denture is free. The free end denture is composed of an end denture, and the free end denture is arranged on at least one denture body attached adjacent to the abutment tooth, a denture base supporting the denture body, and an end side adjacent to the abutment tooth. Opposite to the abutment tooth with respect to the grooved engaging portion and the grooved engaging portion when viewed in the mounted state of the artificial tooth at a position inside the free end denture and adjacent to the grooved engaging portion. It has a magnet arranged at a position on the side, and the groove formed in the grooved engaging portion extends in the direction connecting the denture base and the denture body, and the grooved engaging portion has a groove. A groove is formed in the direction from the denture base to the denture body, and the protruding portion is in a direction in which the denture can be engaged from the side surface of the metal crown into the groove of the grooved engaging portion when viewed in the mounted state of the denture. When viewed in a state where the free-end denture is attached to the abutment tooth, the protruding portion engages with the groove portion of the grooved engaging portion, so that the free-end denture becomes the abutment tooth. When the denture base of the free end denture comes into contact with the denture, the free end denture is attached to the abutment tooth, and the magnet is magnetically pulled to the protruding portion made of the magnetic material. A force is applied to prevent the free end denture from separating from the abutment tooth, and in a state where the free end denture is attached to the abutment tooth, the protruding portion is subjected to a magnetic tensile force while applying a magnetic tensile force to the protruding portion. The extension direction of the free end denture is with respect to the central axis of the abutment tooth in a state where the protrusion is stayed at a predetermined position in the extension direction of the groove while being movable along the groove. The groove can be changed within a predetermined angle range, and the groove has a recessed protrusion-like retaining portion that prevents the protrusion from coming off the groove when the denture is attached. Provided at the denture base side end, the tooth tip side end of the groove is open above the denture, and the free end denture is attached to the abutment tooth to occlude and receive occlusal force. In a state where the denture base is pressed against the denture and sinks, the protruding portion does not hit the end on the tip side, and both are separated by a certain space. Further, by utilizing the elastic force of the elastic engaging portion provided on the denture, the protruding portion stays in the groove formed in the grooved engaging portion during mounting of the denture. It is characterized by becoming.

In the first embodiment and the second embodiment, an implant may be used as the abutment tooth instead of the natural tooth, and the metal crown may be attached to the implant.

Subsequently, a second embodiment of the present invention will be described. The second embodiment is a free end denture whose one end is attached to one abutment tooth and a metal crown that forms the abutment tooth by being put on the remaining tooth in the attachment. The free end denture has a protruding portion protruding from a predetermined position on the peripheral surface of the metal crown toward the end side of the free end denture facing the abutment tooth when viewed in a state of being attached to the abutment tooth. It consists of a metal crown and a free-end denture whose one end is attached to and detachable from the protruding portion of the metal crown, and the protruding portion of the metal crown is a substantially spherical body made of a magnetic material, and the substantially spherical body and the metal crown. The fixing portion has a fixing portion forming a connecting portion, and the fixing portion has an embedded fixing portion arranged in the metal crown, and one end of the embedded fixing portion is coupled to be exposed from the surface of the metal crown to be exposed from the surface of the metal crown. The thickness of the connection fixing portion is smaller than the outer diameter of the substantially spherical body, and the central axis direction of the connection fixing portion is such that the free end denture is attached to the abutment tooth. When viewed in the attached state, it extends from the lateral outer peripheral surface of the metal crown toward one end side of the free end denture facing the metal crown, and extends to one end side of the free end denture facing the metal crown. Is formed so that the accommodating dent portion in which the substantially spherical body can be taken in and out is formed, and is located in the vicinity of the accommodating dent portion and on the other end side of the free end denture from the accommodating dent portion. The substantially sphere has a magnet provided inside the free end denture, and when viewed in a state where the free end denture is attached to the abutment tooth, the outer peripheral surface of the substantially sphere has the accommodating recess. By staying in the accommodating recess by magnetic tensile force while engaging with the inner peripheral surface of the free end denture, the free end denture is in contact with the surface of the dentin while the bottom of the denture base of the free end denture is in contact with the surface of the dentin. When the end opposite to one end of the free end denture is the other end, the free end denture can be attached to the free end denture according to the occlusal force acting on the free end denture at the time of occlusion. With the recess provided at one end as the fulcrum and the other end as the free end, the free end denture itself moves within the range in which the occlusal force acts, and the free end denture aligns with the direction in which the occlusal force acts during the occlusal. A machine that exceeds the allowable range of strength in the protruding portion and the accommodating recess due to the compressive repulsive force from the dentition generated by pressing the bottom of the denture base of the free end denture against the dentin through the denture base. It is possible to occlude while absorbing the occlusal force without causing a target stress, and further, an elastic engaging portion provided on the denture. It is characterized in that the protruding portion stays in the accommodating recess while the denture is attached by utilizing the elastic force.

In this second embodiment, the protrusion may be provided with a substantially hemispherical body instead of the substantially spherical body. Also,
Instead of covering the crown with the metal crown to form the abutment tooth, an implant may be used to form the abutment tooth together with the metal crown.

A feature of the present invention is that the magnets are arranged so as to extend in the extending direction of the free end denture, so that the size of the magnet, that is, the magnetic material is abbreviated according to the number of denture bodies provided in the free end denture. The magnitude of the magnetic tensile force exerted on the sphere can be adjusted. As a result, the metal crown of the abutment tooth is provided with a sufficiently large magnetic tensile force that does not easily come off when the denture 10 having a large number of denture bodies and a long length in the longitudinal direction is attached to the abutment tooth. It can act on a grooved magnetic member which is a magnetic material.

In particular, since the size of the grooved magnetic member is naturally larger than that of the convex protrusion, the magnetic tensile force of the magnet arranged in the extending direction of the denture base of the free-end denture is sufficient for the grooved magnetic member. Acts on.

Thereby, by changing the size of the magnet, one end of the free-end denture can be firmly held by each abutment tooth.

In this way, for example, a larger magnetic tensile force can be applied to the grooved magnetic member than when the metal crown is provided with the ridge protrusion, so that a comparison with a large number of denture bodies (artificial teeth) can be performed. Even for free-end dentures that are large (long in the longitudinal direction of the denture base), they may be firmly attached to the abutment teeth at both ends and occluded, or even if they are not occluded, they may go out in daily life. It can be prevented from coming off.

Further, according to the present invention, instead of attaching an elongated and small convex protrusion to the metal crown, a grooved magnetic member having a considerably larger size is attached. That is, the contact area between the grooved magnetic member and the metal crown is considerably larger than that in the case where the convex protrusion is provided on the metal crown. This makes it possible to prevent the grooved magnetic member from peeling off from the metal crown even if the free end denture is used for a long period of time using an adhesive or the like having sufficient adhesive strength.

Furthermore, if the grooved magnetic member itself is mass-produced in advance and stored as a unit, if the sliding engagement with the convex protrusion is repeated for a long period of time, the groove portion of the grooved magnetic member is worn out. However, it is possible to visit the dental clinic only a few times and replace it with a new grooved magnetic member.

Further, as described above, by providing the metal crown with a grooved engaging portion having a size larger than that of the convex protrusion made of a magnetic material, a sufficient magnetic tensile force can be obtained from the magnet arranged inside the free end denture. Stable reception over a long period of time can solve all the problems that arise when continuing to use the commonly used free-end dentures with clasps.

Specifically, as described above, when a large occlusal force that constantly changes in direction and size during occlusal acts on the clasp part of a denture with a clasp that is generally used in the past, this part is caused by metal fatigue. There was a problem that it would loosen or break.

In addition, when a conventional denture equipped with a clasp is attached to the abutment tooth, the clasp is conspicuous when the mouth is opened, and there is an aesthetic problem. Furthermore, after long-term use, the clasp will loosen and the denture will easily come off, and the denture that has come off in the mouth will continue to be pressed with the tongue, or the denture will accidentally come off due to sneezing and pop out of the mouth. Inviting such a situation, it was not possible to continue using it for a long period of time, which hindered the improvement of the quality of life, which is regarded as important for the advent of an aging society in recent years.

Furthermore, when using a denture equipped with a conventional clasp, it is necessary to regularly check whether the clasp part is loose and to perform time-consuming maintenance to restore this part if looseness is found. Was supposed to be. In addition, when removing a denture equipped with a conventional clasp and cleaning it, especially for a denture wearer with a handicapped fingertip, the denture is accidentally dropped on the floor, and the metal clasp part is bent. There was also a risk of breaking or breaking. In such a case, if this part of the clasp is restored to its original state, or if it is bent or damaged to the extent that it cannot be repaired, there is a troublesome problem that the entire clasp must be replaced with a new one. It was.

Then, while requesting repair or replacement of the clasp part, the denture could not be used, which was extremely inconvenient.

However, according to the present invention, since a metal part such as a clasp for fixing and supporting the denture is not provided on the outside of the denture, such inconvenience does not occur at all, and the denture is almost maintenance-free. It has a great merit that you can continue to use it with confidence.

Further, according to the present invention, in addition to being able to arrange a magnet having sufficient magnetic tensile force according to the size of the denture, the outer peripheral surface of the protruding portion for engaging the denture is formed in a bud shape. Therefore, even when the denture is attached / detached, the denture can be attached / detached without damaging the denture engaging protrusion housed in the abutment tooth engaging recess. As a result, the denture can be attached and detached very easily, and the denture wearer who cannot move the fingertip dexterously in old age can easily attach and detach the denture from the abutment tooth by himself.

It should be noted that the above-described embodiments and various modifications thereof are merely exemplary contents of the present invention, and dentures having various structures having different shapes, materials, sizes, etc. within the scope of the present invention. Needless to say, it may be the mounting attachment.

It should be noted that the above-described embodiment and each modification thereof are merely illustrative of the present invention, and the shape, dimensions, and material thereof can be appropriately changed without departing from the scope of the present invention. Needless to say.

10, 20 Dentures for intermediate missing teeth 90 Spacer 91 Upper surface 92 Lower surface 100 Support member accommodation holding part 110 (111, 112, ...) Denture body 120 Denture base 300 Prosthesis support part 330 Large diameter part 140 Magnetic material accommodation part 141 Opening Part 145 Magnetic material accommodating hole 146 Hole bottom end face (artificial tooth side end)
147 Sliding surface for moving the support part 148 Engagement part accommodating hole 150 Magnet 160 Magnet holder 240 Magnetic material accommodating part 245 Magnetic material accommodating hole 246 Hole bottom End face part 300 Denture support part 310 Tip flat part 320 Tip side curved taper part 330 Large Diameter 340 Base end curved taper 350 Strut 360 Embedded 410 Implant 420 Residual root 421 Periodontal ligament 500 Denture hook (Magnetic material engaging part)
510 Base end 520 Stab 600 Bearing latch engagement (magnetic material engagement)
610 Bearing 620 Shaft 650 Spring 700 Shaft Latch Engagement Part (Magnetic Material Engagement Part)
710 Spherical end 720 Shaft 750 Spring 800 Leaf spring latch engaging part (magnetic material engaging part)
820 Leaf spring 821 Spring tip 900 Gingiva F Bite force quotient S1 First (constant) space S2 Second (constant) space D Saliva

Claims (10)

A denture that attaches a free end denture to a single abutment tooth and its attachment attachment.
The attachment has a metal crown to be attached to the one abutment tooth and a protrusion made of a magnetic material provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved.
The protruding portion has a substantially spherical shape or a substantially hemispherical shape.
The denture is composed of a free end denture, and the free end denture is adjacent to at least one denture body attached adjacent to the abutment tooth, a denture base supporting the denture body, and the abutment tooth. With respect to the grooved engaging portion arranged on the end side and the grooved engaging portion when viewed in the mounted state of the denture at a position inside the free end denture and adjacent to the grooved engaging portion. It has a magnet located on the opposite side of the abutment tooth,
The groove formed in the grooved engaging portion extends in the direction connecting the denture base and the denture body.
A groove is formed in the grooved engaging portion in the direction from the denture base to the denture body.
The protruding portion protrudes from the side surface of the metal crown in a direction in which it can be engaged in the groove portion of the grooved engaging portion when viewed with the denture attached.
When the free end denture is attached to the abutment tooth, the protruding portion engages with the groove portion of the grooved engaging portion, so that the free end denture is coupled to the abutment tooth and at the same time. When the denture base of the free end denture comes into contact with the gingiva, the free end denture is attached to the abutment tooth, and at the same time, the free end denture is attached to the abutment tooth.
The magnet exerts a magnetic tensile force on the protruding portion made of the magnetic material to prevent the free end denture from separating from the abutment tooth.
In a state where the free end denture is attached to the abutment tooth, the protruding portion can move along the groove while applying a magnetic tensile force to the protruding portion, and the protruding portion is the groove portion. The extending direction of the free end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth while staying at a predetermined position in the extending direction.
The groove is provided with a recessed protrusion-shaped retaining portion at the end of the groove on the denture base side to prevent the protrusion from coming off the groove when the denture is attached, and the tooth tip side of the groove. The end is closed by a part of the denture, and the free end denture is attached to the abutment tooth to occlude, and the denture base is pressed against the gingiva and sank by receiving an occlusal force. In the above, the protruding portion does not hit the end on the denture side, and the two are separated by a certain space.
Further, it is characterized in that the protruding portion stays in the groove formed in the grooved engaging portion while the denture is mounted by utilizing the elastic force of the elastic engaging portion provided on the denture. Dentures and their attachments. A denture that attaches a free end denture to a single abutment tooth and its attachment attachment.
The attachment has a metal crown to be attached to the one abutment tooth and a protrusion made of a magnetic material provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved.
The protruding portion has a substantially spherical shape or a substantially hemispherical shape.
The denture is composed of a free end denture, and the free end denture is adjacent to at least one denture body attached adjacent to the abutment tooth, a denture base supporting the denture body, and the abutment tooth. With respect to the grooved engaging portion arranged on the end side and the grooved engaging portion when viewed in the mounted state of the denture at a position inside the free end denture and adjacent to the grooved engaging portion. It has a magnet located on the opposite side of the abutment tooth,
The groove formed in the grooved engaging portion extends in the direction connecting the denture base and the denture body.
A groove is formed in the grooved engaging portion in the direction from the denture base to the denture body.
The protruding portion protrudes from the side surface of the metal crown in a direction in which it can be engaged in the groove portion of the grooved engaging portion when viewed with the denture attached.
When the free end denture is attached to the abutment tooth, the protruding portion engages with the groove portion of the grooved engaging portion, so that the free end denture is coupled to the abutment tooth and at the same time. When the denture base of the free end denture comes into contact with the gingiva, the free end denture is attached to the abutment tooth, and the free end denture is attached to the abutment tooth.
The magnet exerts a magnetic tensile force on the protruding portion made of the magnetic material to prevent the free end denture from separating from the abutment tooth.
In a state where the free end denture is attached to the abutment tooth, the protruding portion can move along the groove while applying a magnetic tensile force to the protruding portion, and the protruding portion is the groove portion. The extending direction of the free end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth while staying at a predetermined position in the extending direction.
The groove is provided with a recessed protrusion-shaped retaining portion at the end of the groove on the denture base side to prevent the protrusion from coming off the groove when the denture is attached, and the tooth tip side of the groove. The end portion is open above the denture, and the free end denture is attached to the abutment tooth to occlude, and the denture base is pressed against the gingiva and sinks under the occlusal force. The protruding portion does not hit the end on the denture side, and the two are separated by a certain space.
Further, it is characterized in that the protruding portion stays in the groove formed in the grooved engaging portion while the denture is mounted by utilizing the elastic force of the elastic engaging portion provided on the denture. Dentures and their attachments. The denture and its attachment attachment according to claim 1 or 2, wherein an implant is used as the abutment tooth instead of a natural tooth, and the metal crown is attached to the implant. The metal crown according to any one of claims 1 to 3, which can be used only for the denture according to any one of claims 1 to 3 and its attachment attachment. The free end denture according to any one of claims 1 to 3, which can be used only for the denture according to any one of claims 1 to 3 and its attachment attachment. In free-end dentures and their attachments, one end of which can be attached to a single abutment tooth
A metal crown that forms the abutment tooth by covering the remaining teeth, and the free end denture is viewed from a predetermined position on the peripheral surface of the metal crown when the free end denture is attached to the abutment tooth. Consists of a metal crown having a protruding portion on the end side facing the abutment tooth, and a free end denture having one end attached to the protruding portion of the metal crown and removable.
The protruding portion of the metal crown has a substantially spherical body made of a magnetic material and a fixing portion forming a connecting portion between the substantially spherical body and the metal crown.
The fixing portion comprises an embedded fixing portion arranged in the metal crown and a connecting fixing portion in which one end is connected to the embedded fixing portion and exposed from the surface of the metal crown to connect the substantially spherical body.
The thickness of the connection fixing portion is smaller than the outer diameter of the substantially spherical body, and the direction of the central axis of the connection fixing portion is the metal when the free end denture is attached to the abutment tooth. It extends from the lateral outer peripheral surface of the crown toward one end side of the free end denture facing the metal crown.
On one end side of the free-end denture facing the metal crown, a housing recess for accommodating the substantially spherical body so as to be able to be taken in and out is formed, and at the same time, in the vicinity of the housing recess and from the housing recess. It has a magnet provided inside the free end denture so as to be located on the other end side of the free end denture.
When the free end denture is attached to the abutment tooth, the substantially sphere is formed in the accommodation recess while the outer peripheral surface of the substantially sphere engages with the inner peripheral surface of the accommodation recess. By staying with a magnetic tensile force, the free end denture can be attached to the abutment tooth with the bottom of the denture base of the free end denture in contact with the surface of the gingiva.
When the end opposite to one end of the free end denture is the other end, the recess provided at one end of the free end denture is used as a fulcrum according to the occlusal force acting on the free end denture at the time of occlusion. With the other end as the free end, the free end denture itself moves within the range where the occlusal force acts, and at the time of the occlusal, the free end denture moves in the direction in which the occlusal force acts. The compression repulsive force from the gingiva generated by pressing the bottom portion against the gingiva through the denture base does not cause the protruding portion or the accommodating recess to generate mechanical stress exceeding the allowable range of strength. It is possible to occlude while absorbing the occlusal force,
Further, the denture and its attachment attachment are characterized in that the protruding portion stays in the accommodating recess during mounting of the denture by utilizing the elastic force of the elastic engaging portion provided on the denture. The free end denture and its attachment attachment according to claim 6, wherein a substantially hemispherical body is provided on the protrusion instead of the substantially spherical body. The invention according to any one of claims 6 to 7, wherein the abutment tooth is formed together with the metal crown by using an implant instead of covering the crown with the metal crown to form the abutment tooth. Free end denture and its mounting attachment. The metal crown according to any one of claims 6 to 8, which can be used only for the free end denture according to any one of claims 6 to 8 and its attachment. The free end denture according to any one of claims 6 to 8, which can be used only for the free end denture according to any one of claims 6 to 8 and an attachment thereof.

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