JP6598267B1 - Denture and its attachment - Google Patents

Abstract

The present invention provides a denture and its attachment for providing a denture wearer with a superior feeling of wearing and a comfortable bite during meals. An attachment 20 has a metal crown 210 attached to one abutment tooth, and a projecting portion 220 made of a magnetic material provided around the abutment tooth. A grooved engaging portion 130 disposed on the end side adjacent to 80 and a magnet 140 accommodated on the coupling portion side with the free end denture, and the protruding portion engages with the grooved engaging portion. The free end denture is coupled to the abutment tooth so that the free end denture is not separated from the abutment tooth by the magnetic pulling force exerted on the protruding portion of the magnet, and the protruding portion is fitted in the grooved engaging portion. The relative position and the relative angle of the free end denture with respect to the abutment tooth can be changed within a predetermined range while at least a part of the curved portion of the protruding portion remains in the grooved engagement portion, and the denture of the grooved engagement portion The floor-side end portion is provided with a protruding portion 135 for preventing the protrusion. [Selection] Figure 1

Description

  The present invention relates to a denture and its attachment.

  Originally, there is little need to wear a denture or implant if it is properly treated, but the reality is that this doesn't work as well. There is a need to embed. In Japan, where the proportion of elderly people is increasing rapidly, the opportunity and necessity of attaching dentures and implanting implants are rapidly increasing, especially in accordance with the recent aging society.

  However, when attaching a denture, it is necessary to fit and fix a clasp to the remaining tooth. According to such a fixing method, for example, when you laugh unexpectedly with your mouth wide open during conversation, the metal part of the clasp meshing with the abutment tooth can be seen from the gap of the teeth to the other party, and it is unexpectedly embarrassing You may not be able to enjoy your conversations.

  In addition, if a denture with a clasp is used for a long period of time, the clasp itself will be plastically deformed and the denture will be easily detached. I need it.

  Also, in some cases, the clasp itself may be cut due to extreme stress on a part of the clasp or fatigue failure due to long-term use, and the cut end may cut into the gums and cause unexpected injury. It may cause. Furthermore, a part of such a clasp breaks and becomes a broken piece and is swallowed without being noticed, which may lead to an unexpected poor physical condition due to accidental ingestion of foreign matter.

  On the other hand, instead of inserting a denture using a clasp, it has been widely practiced to embed an implant in a missing portion of a tooth in recent years. However, the cost per implant for embedding implants is high, and it becomes quite expensive to implant many implants. Also, especially in the elderly, if the bone of the jaw is fragile or the bone itself is thin, if you implant the implant forcibly, part of the embedded part will damage the nerve at the root of the tooth, Serious problems such as continuous pain and paralysis may occur.

  From the above, a technique for mounting a denture using a magnetic force by a magnet in order to eliminate such a problem has been disclosed (for example, see Patent Documents 1 to 3).

JP-A-9-51902 Japanese Patent Laid-Open No. 2004-97591 JP 7-136189 A

  The dentures disclosed in the prior patent documents 1 to 3 are configured using magnets, but without providing so-called play to the abutment teeth to which they are attached, that is, the upper teeth and the lower teeth Can be attached without any deviation in the direction of biting and in the direction perpendicular to this direction.

  Therefore, when the tooth is bitten and an occlusal force is applied to the denture, the displacement in the direction in which the denture deviates (escapes) from the direction of biting the tooth is completely regulated.

  As a result, for example, even if a slight step is generated between the tip of the denture and the tip of the abutment tooth, this step remains as it is without being absorbed by the above-mentioned play, so that each time it is bitten, it feels strange. The food that has entered the gap created by the step is not bitten and swallowed as it is, causing indigestion and placing an extra burden on the gastrointestinal tract.

  Further, when the position of the occlusal surface of the artificial tooth is higher than the height of the tip of the abutment tooth to which the denture is attached, the occlusal force is directly applied only to the denture during occlusion. As a result, the magnet mounting portion may be damaged, and a part thereof may be swallowed, resulting in a dangerous state.

  Also, if the height of the abutment tooth is higher than the occlusal surface of the artificial tooth, the occlusal force acts directly only on the abutment tooth, and the periodontal ligament that acts as a cushion in the abutment tooth is crushed ( Eventually, the abutment teeth may be lost.

  An object of the present invention is to provide a denture that can be easily attached to and detached from an abutment tooth, and that can provide a denture wearer with an excellent feeling of wearing and a comfortable bite during meals, and an attachment for the denture. .

In order to solve the above-described problem, a denture and its attachment according to claim 1 of the present invention are:
A denture that attaches a free-end denture to a single abutment and its attachment,
The mounting attachment has a metal crown to be attached to the one abutment tooth, and a protrusion made of a magnetic body provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved.
The protrusion 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. A grooved engagement portion disposed on the end side, and the grooved engagement portion as viewed in the mounted state of the denture in a position adjacent to the grooved engagement portion inside the free end denture. A magnet disposed at a position opposite to the abutment tooth,
The groove formed in the grooved engagement portion extends in a direction connecting the denture base and the denture body,
In the grooved engagement portion, a groove portion is formed in a direction from the denture base toward the denture body,
The protruding portion protrudes from the side surface of the metal crown as viewed in the mounted state of the denture in a direction in which the protruding portion can be engaged in the groove portion of the grooved engaging portion,
The free end denture is coupled to the abutment tooth by seeing the free end denture attached to the abutment tooth, and the protruding portion is engaged with the groove portion of the grooved engagement portion. With the denture base of the free end denture coming into contact with the gingiva, the free end denture is attached to the abutment tooth,
The magnet causes a magnetic pulling force to act on the projecting portion made of the magnetic material so that the free end denture does not leave the abutment tooth,
In a state where the free end denture is attached to the abutment tooth, the protrusion is movable along the groove while applying a magnetic pulling force to the protrusion, and the protrusion is formed on the groove. The extension direction of the free-end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth in a state where it remains at a predetermined position in the extension direction ,
The groove portion is provided with a recessed protrusion-like retaining portion on the denture base side of the groove portion so that the protruding portion does not come off from the groove portion when the denture is mounted, and the tooth portion side of the groove portion The end portion is blocked by a part of the denture, and the free end denture is attached to the abutment tooth to be occluded, and the denture base is pressed against the gingiva by receiving the occlusal force and sinks. In the above, the protruding portion does not contact the end portion on the tooth tip side, and both are separated by a certain space .

  By having such a configuration, the present invention can maximize the merit as a mucosal burden denture. In other words, the free end denture can be attached to the abutment tooth and used continuously without adversely affecting the abutment tooth of the denture wearer who has damaged the periodontal membrane of the abutment tooth.

  Specifically, the denture according to claim 1 of the present invention and the attachment thereof have such a configuration, so that the denture is equipped with a magnet provided with a slight play in the attachment relationship of the denture to the abutment tooth. The protrusion provided on the metal crown can be pulled and held firmly.

  Further, since such a groove portion is formed in the grooved engaging portion, the protruding portion can freely move in the groove portion. Furthermore, the extending direction of the free end denture can be changed without difficulty within a predetermined angle range with respect to the central axis of the abutment tooth. As a result, it is not necessary to apply an excessive force to the connection portion between the abutment tooth and the free end denture during occlusion.

  This prevents the occlusal force on the opposite side from being applied to the abutment tooth more than necessary during occlusion, and excessive force is applied to the abutment tooth, damaging the periodontal ligament or crushing the periodontal ligament itself. It is possible to prevent the loss of valuable abutment teeth by making the abutment teeth last longer.

  Moreover, there is no extra space between the abutment tooth and the denture at the time of occlusion, and there is no possibility of ingestion in the gastrointestinal tract as it is swallowed as it is and the food that cannot be chewed by being caught in such a space. In addition, the gingiva is not damaged by the breakage of the joint portion of the denture, and the problem of accidental swallowing of the broken portion does not occur.

In addition, the formation of such a space maximizes the merit of the mucosa-supported denture according to the present invention, and the occlusal force is applied to the periodontal ligament of the abutment tooth at the time of occlusion, and the periodontal membrane hurts To prevent the abutment tooth loss.

  In addition, the end of the groove opposite to the retaining part is closed with a denture abutment, so that food can be prevented from getting stuck in the groove while biting food. it can.

Further, the denture according to claim 2 of the present invention and its attachment are as follows:
A denture that attaches a free-end denture to a single abutment and its attachment,
The mounting attachment has a metal crown to be attached to the one abutment tooth, and a protrusion made of a magnetic body provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved.
The protrusion 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. A grooved engagement portion disposed on the end side, and the grooved engagement portion as viewed in the mounted state of the denture in a position adjacent to the grooved engagement portion inside the free end denture. A magnet disposed at a position opposite to the abutment tooth,
The groove formed in the grooved engagement portion extends in a direction connecting the denture base and the denture body,
In the grooved engagement portion, a groove portion is formed in a direction from the denture base toward the denture body,
The protruding portion protrudes from the side surface of the metal crown as viewed in the mounted state of the denture in a direction in which the protruding portion can be engaged in the groove portion of the grooved engaging portion,
The free end denture is coupled to the abutment tooth by seeing the free end denture attached to the abutment tooth, and the protruding portion is engaged with the groove portion of the grooved engagement portion. With the denture base of the free end denture coming into contact with the gingiva, the free end denture is attached to the abutment tooth,
The magnet causes a magnetic pulling force to act on the projecting portion made of the magnetic material so that the free end denture does not leave the abutment tooth,
In a state where the free end denture is attached to the abutment tooth, the protrusion is movable along the groove while applying a magnetic pulling force to the protrusion, and the protrusion is formed on the groove. The extension direction of the free-end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth in a state where it remains at a predetermined position in the extension direction ,
The groove portion is provided with a recessed protrusion-like retaining portion on the denture base side of the groove portion so that the protruding portion does not come off from the groove portion when the denture is mounted, and the tooth portion side of the groove portion In the state where the end is opened above the denture, and the free end denture is attached to the abutment tooth and bitten, and the denture base is pressed against the gingiva by receiving occlusal force, The protruding portion does not contact the end portion on the tooth tip side, and both are spaced apart by a certain space .

By having such a configuration, the present invention can maximize the merit as a mucosal burden denture. In other words, the free end denture can be attached to the abutment tooth and used continuously without adversely affecting the abutment tooth of the denture wearer who has damaged the periodontal membrane of the abutment tooth.
Specifically, the denture according to claim 2 of the present invention and the attachment thereof have such a configuration, so that the denture is equipped with a magnet provided with a slight play in the attachment relationship of the denture to the abutment tooth. The protrusion provided on the metal crown can be pulled and held firmly.
Further, since such a groove portion is formed in the grooved engaging portion, the protruding portion can freely move in the groove portion. Furthermore, the extending direction of the free end denture can be changed without difficulty within a predetermined angle range with respect to the central axis of the abutment tooth. As a result, it is not necessary to apply an excessive force to the connection portion between the abutment tooth and the free end denture during occlusion.
This prevents the occlusal force on the opposite side from being applied to the abutment tooth more than necessary during occlusion, and excessive force is applied to the abutment tooth, damaging the periodontal ligament or crushing the periodontal ligament itself. It is possible to prevent the loss of valuable abutment teeth by making the abutment teeth last longer.
Moreover, there is no extra space between the abutment tooth and the denture at the time of occlusion, and there is no risk of ingestion in the gastrointestinal tract being swallowed as it is by being caught in such a space. In addition, the gingiva is not damaged by the breakage of the joint portion of the denture, and the problem of accidental swallowing of the broken portion does not occur.
In addition, since the end portion on the opposite side of the retaining portion of the groove portion is opened above the denture, the configuration of the denture itself can be simplified, and the cost can be reduced.

  In addition, the formation of such a space maximizes the merit of the mucosa-supported denture according to the present invention, and the occlusal force is applied to the periodontal ligament of the abutment tooth at the time of occlusion, resulting in pain in the periodontal ligament. To prevent the abutment tooth loss.

Moreover, the denture and its attachment attachment which concern on Claim 3 of this invention are the denture and its attachment attachment of Claim 1 or Claim 2 ,
In a state where the free end denture is attached to the abutment tooth, the retaining portion is arranged to be opposed to the gingiva with which the denture base of the free end denture contacts with a certain space therebetween. It is characterized by.

  By forming such a space between the gingiva where the retaining part and the denture base of the free end denture contact, the retaining part is pressed against the gingiva when the free end denture is attached to or removed from the abutment tooth. In addition, it is possible to easily and comfortably attach and detach the abutment tooth of the free end denture.

  In addition, since such a space is formed between the gingiva where the retaining portion and the denture base of the free-end denture contact, the gap between the protruding portion of the metal crown and the gingiva facing the gingiva after the denture is removed. There will be a wider gap. By creating such a gap, such a predetermined space is formed, so that when eating dentures and brushing the abutment tooth with a toothbrush, etc., the food waste accumulated in this gap can be easily eaten. Can be removed. As a result, these portions do not remain clogged in this portion, and subsequent generation of decay and bad breath can be prevented.

Moreover, the denture and its attachment attachment which concern on Claim 4 of this invention are the denture and its attachment attachment of Claim 1 or Claim 2 ,
The groove width of the groove portion is a groove width that does not interfere with each other when inserted in order to engage the protruding portion with the groove portion, and in the state where the free end denture is attached to the abutment tooth, The protruding part of the crown is engaged with the groove part only by the attractive force of the magnet provided on the free end denture.

  The groove width of the groove portion is a groove width that does not interfere when inserted to engage the protrusion portion, and the protrusion portion is pressed against the groove portion only by the attractive force of the magnet. It is no longer necessary to strictly manage dimensional tolerances. Thereby, while being able to aim at the cost reduction of a denture, when attaching or detaching a denture from an abutment tooth, it can attach or detach easily.

Moreover, the denture and its attachment attachment which concern on Claim 5 of this invention are the denture and its attachment attachment of Claim 1 or Claim 2 ,
The protrusion has a base end on the connection side with the metal crown that is thinner than other portions of the protrusion, and the groove width of the opening of the groove is determined by the attachment of the free end denture. In order to make the free end denture detachable with respect to the abutment tooth by pushing force or pulling force by a person's finger, in addition to the magnetic attractive force exerted on the protrusion by the magnet, the opening of the groove portion is The protrusion is smaller than the maximum width portion of the protrusion so as to prevent the protrusion from being detached from the groove due to the engaging force exerted on the protrusion, and the protrusion can slide within a predetermined range within the groove. Thus, the groove width inside the groove is larger than the groove width of the opening.

  Since the relative relationship between the groove and the protrusion has such a so-called latch-engaged relationship as to each other, once the protrusion is engaged with the groove, the protrusion is not easily removed from the groove together with the attractive force received from the magnet. Become. As a result, once the denture is attached to the abutment tooth, the denture is not easily detached from the abutment tooth, and even a relatively hard food can be eaten by being firmly bitten so that it can be easily tasted and easily digested. .

Moreover, the denture and its attachment attachment which concern on Claim 6 of this invention are the denture and its attachment attachment of Claim 5 ,
The protrusion is characterized by a substantially spherical body.

Since the projecting portion is a substantially spherical body, the function of claim 5 can be easily realized.

Moreover, the denture and its attachment attachment which concern on Claim 7 of this invention are the denture and its attachment attachment in any one of Claim 1 thru | or 6 .
The amount of displacement of the protrusion relative to the extending direction of the groove when the free end denture is attached to the abutment tooth is pressed against the gingiva of the free end denture during occlusion. The occlusal force from the tooth facing the denture and the abutment tooth is defined to be received by the free end denture.

  Since the amount of displacement in the extending direction received by the groove of the protruding portion is defined in this way, the free end denture is pressed against the gingiva when it is bitten, so that it receives (burdens) the bite force. In addition to protecting the periodontal ligament of the abutment tooth, all the various problems described in the column of problems to be solved by the invention can be solved.

Moreover, the denture and its attachment attachment which concern on Claim 8 of this invention are the denture and its attachment attachment in any one of Claim 1 thru | or 7 .
An implant is used as the abutment tooth instead of a natural tooth, and the metal crown is attached to the implant.

  Even when it is necessary to prevent the occlusal force from being applied to the implant as an abutment tooth according to the age and occlusal force of the denture wearer, this denture and its attachment attachment play an extremely useful role.

A metal crown according to claim 9 of the present invention is
It is a metal crown which has a protrusion part used for the denture as described in any one of Claim 1 thru | or 7 , and its attachment attachment.

A free-end denture according to claim 10 of the present invention is
A free-end denture used in the denture according to any one of claims 1 to 7 and its attachment.

  ADVANTAGE OF THE INVENTION According to this invention, the denture which can perform attachment / detachment of a denture easily, and can provide the comfortable wearing feeling and comfortable biting feeling in a meal for a denture wearer, and its attachment can be provided.

It is a side view which shows the structure of the denture based on the 1st Embodiment of this invention, and its attachment attachment 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 the elements on larger scale of the denture shown in FIG. 1, and its attachment attachment. It is a perspective view which expands and shows a part of attachment attachment shown in FIG. It is a side view corresponding to FIG. 1 for demonstrating the effect | action of 1st Embodiment. It is a figure corresponding to FIG. 3 which shows the form which changed a part of denture shown in FIG. It is explanatory drawing which shows an example of the attachment position of the denture based on 1st Embodiment shown in FIG. 1 thru | or FIG. 4, and its attachment attachment. It is a side view corresponding to FIG. 1 which shows the modification of 1st Embodiment. It is a top view corresponding to FIG. 2 which shows the modification of 1st Embodiment partially. It is a partial side view which shows the denture based on the 2nd Embodiment of this invention, and its attachment attachment 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 partial side view corresponding to FIG. 10 for demonstrating the effect | action of 2nd Embodiment. It is explanatory drawing which shows an example of the attachment position of the denture based on 2nd Embodiment shown in FIG.10 and FIG.11 and its attachment attachment. A plan view partially showing the second embodiment shown in FIGS. 10 and 11 (FIG. 14A), and a plan view partially showing a first modification of the second embodiment (FIG. 14B). )), And a plan view partially showing the second modification (FIG. 14C) and a plan view partially showing the third modification (FIG. 14D). It is a side view shown about the 4th modification of 2nd Embodiment.

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

  Among those who need to wear dentures, there are physical differences between individuals and the periodontal ligament of the abutment tooth is considerably damaged with age, while the periodontal ligament of the abutment tooth is healthy. Some people keep it. Here, in the case of a person whose periodontal membrane of the abutment tooth is considerably crushed and damaged, if the occlusal force acts on not only the denture but also the abutment tooth when the denture is attached to the abutment tooth, the root will The membrane is compressed accordingly, and the periodontal ligament is further damaged. If the periodontal ligament is extremely damaged, the abutment tooth itself cannot withstand the burden of attaching a denture, and the abutment tooth will eventually be lost.

  To prevent denture loss for denture wearers whose periodontal ligament has been damaged with age, the occlusal force is in the denture base of the denture (free-end denture and intermediate missing denture). It is preferable to use a mucosal burden type denture that provides (provides in the present invention) the action of receiving (burdening) this occlusal force by pressing the gingiva and causing the pressing force to sink the denture itself.

The above reason will be supplemented with a more objective explanation. The occlusal force is extremely large as about 3 MPa to about 9 MPa (average 30 kg to 90 kg per 1 cm ² (300 to 900 tons per 1 m ² )). Therefore, even if a healthy periodontal ligament can be borne, if the periodontal ligament is not healthy due to periodontal disease or the like, the burden becomes excessive and pain occurs during occlusion. In many cases, the periodontal ligament is damaged and the tooth is extracted.

  If you feel pain at the time of such occlusion, you cannot expect to eat a normal meal in your daily life, which will cause serious problems in terms of quality of life. Therefore, when the periodontal ligament is not healthy, it should be devised so as not to become a periodontal ligament burden when the denture is mounted. In this case, as the most effective countermeasure, it is a preferable selection means to attach the above-mentioned mucosal burden type denture.

  In the following description of the first and second embodiments and their modifications, each component is also shown in the drawings, but the shape and size of each component in each drawing are exactly the same. I have not let it. This is because these differences in shape and dimensions are all included in the scope of the present invention, and are therefore made easy to understand for convenience of explanation. Accordingly, it should be noted that differences in the shape and dimensional relationship of each component in each drawing do not affect the scope of the present invention at all.

  Further, in the description related to each drawing, the vertical direction is determined with reference to a 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. The plan view is a state seen from the tip side of the denture tooth. Further, portions to be hatched in the drawings are appropriately omitted for easy understanding of the description.

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

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

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

  The protrusion 220 has a substantially spherical shape in the present embodiment. More specifically, as shown in FIG. 3, the protrusion 220 has a concave portion on the base end side of the spherical body, that is, a portion on the base side of the abutment tooth 80, and in the state shown in FIG. A tip 136 of a retaining portion 135 that extends from a lower end of a grooved engaging portion 130 described later enters and engages with the lower concave portion 222. The protrusion 220 is made of a magnetic material, and is made of, for example, stainless steel, a gold alloy, a platinum alloy, or the like that is excellent in strength, durability, and corrosion resistance.

  In the protrusion 220, the base end 221 of the protrusion 220 is joined to a part of the peripheral surface of the metal crown 210 by a third alloy, held by a cast metal, or brazed at the time of casting. The protruding portion 220 protrudes in the mounting direction of the free end denture 10.

  A magnet 140 described later applies a magnetic pulling force to the projecting portion 220 made of a magnetic material so that the free end denture 10 is not separated from the abutment tooth 80. Further, in the state shown in FIG. 3, the distal end 136 of the retaining portion 135 is caught by the lower recessed portion 222 of the projecting portion 220 so that the free end denture 10 is not separated from the abutment tooth 80. Yes.

  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 disposed at an end adjacent to the abutment tooth 80. And a magnet 140 which is housed in the magnet holder 150 and embedded in the denture body 110 and the denture base 120 and provided on the coupling portion side with the free end denture 10.

  In the case of this 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 having excellent durability, strength, and corrosion resistance. The magnet holder 150 is made of a denture body 110 and a denture base 120 made of denture resin. Embedded inside. Note that the grooved engaging portion 130 and the magnet holder 150 are not necessarily formed integrally, and they may be formed separately and firmly coupled to each other.

  With this embodiment having such a configuration, the magnet 140 is not exposed in the mouth of the denture wearer, and the taste of the taste is not good depending on the material of the magnet 140. To prevent entry.

  The grooved engagement portion 130 has a groove portion 131 that extends from the denture base side of the free-end denture 10 toward the distal end of the denture body 110 (upper end in FIGS. 1 and 3). Furthermore, at the end portion of the denture base side of the grooved engaging portion 130 (the lower end of FIGS. 1 and 3), the protruding portion 220 is prevented from coming out of a predetermined portion of the grooved engaging portion 130. A stop 135 is provided.

  The groove width of the groove portion 131 is a width that does not interfere with each other when the groove portion 131 is inserted to engage the protruding portion 220 with the groove portion 131. Thereby, in the state which attached the free end denture 10 to the abutment tooth 80, the protrusion part 220 becomes the lower side recessed part 222 and the retaining part according to the attraction force of the magnet 140 with which the free end denture 10 was equipped, and the case. 135 is pressed against the groove 131 by the engaging force with the tip 136.

  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 is movable along the groove 131 of the grooved engagement portion 130 of the free end denture 10. Furthermore, since the protrusion 220 has a substantially spherical body, the grooved engagement portion 130 extends in the extending direction of the free end denture 10 in a state where the protrusion 220 remains at a predetermined position in the extending direction of the groove 131. Can be changed within a predetermined angle range with respect to the central axis of the abutment tooth 80.

  In addition, the displacement amount of the protrusion part 220 with respect to the extending direction of the groove part 131 in the state where the free end denture 10 is attached to the abutment tooth 80 is the saliva D of the denture base 120 of the free end denture 10 when the denture wearer bites. The pressure is applied to the gingiva 800, 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 gingiva 800, and the occlusal force However, the dimension is specified so as not to adversely affect the periodontal membrane 81 of the abutment tooth 80.

  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) interposed therebetween.

  Further, the retaining portion 135 is attached to the upper surface of the gingiva 800 where the denture base 120 of the free end denture 10 is attached to the entire bottom surface with saliva interposed in a state where the free end denture 10 is attached to the abutment tooth 80. On the other hand, they are arranged opposite to each other with a certain space S1 therebetween.

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

  Based on the above configuration, when the free end denture 10 is attached to the abutment tooth 80 and the protruding portion 220 engages with the grooved engagement portion 130, the free end denture 10 becomes the abutment. The bottom surface of the denture base 120 of the free-end denture 10 is in close contact with the upper surface of the gingiva 800 through the saliva in the mouth (see the portion indicated by the dot D in FIG. 1) while being bonded to the teeth 80. 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 this embodiment). The relative position and the 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) remains in the grooved engagement portion 130 by the magnetic pulling force.

  Since the denture according to the first embodiment of the present invention and its attachment 1 have the above-described configuration, the following operational effects can be exhibited. Specifically, the projecting portion 220 provided on the metal crown 210 is firmly pulled by the magnet 140 provided on the free end denture 10 while providing a slight play in the attachment relationship of the free end denture 10 to the abutment tooth 80. Can be held. As a result, the occlusal force at the time of occlusion is applied to the denture base 120 of the free-end denture 10 by pressing the gum 800 to push out the saliva interposed between the denture base 120 and the gum 800 to the outside of the denture base 120 and Use as a pressing force to sink. Thereby, it is possible to prevent the periodontal membrane 81 of the abutment tooth 80 from being crushed due to the occlusal force applied only to the abutment tooth 80.

  FIG. 5 is a side view corresponding to FIG. 1 for explaining the above-described operation. When the teeth are bitten in 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 (dots in FIG. 5) interposed between the denture base 120 and the gingiva 800. And the portion of the gingiva 800 on the lower side of the denture base 120 is pushed down and the occlusal force is applied to the abutment tooth 80 to adversely affect the periodontal ligament 81. This can be understood from the drawings.

  In addition, in the state where the free end denture 10 is attached to the abutment tooth 80 and engaged, 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, the progress of deterioration of the periodontal ligament 81 can be prevented without applying an occlusal force to the periodontal ligament 81 of the abutment tooth 80 even if the tooth is strongly bitten.

  As a result, the denture wearer can have a comfortable fit and bite feeling, can continue to bite comfortably while biting food, and can continue to wear the denture and enjoy a meal without being stressed become. As a result, food can be digested properly, and it can contribute to the improvement of physical condition while maintaining the health that is particularly important for the elderly.

  In addition, there is no extra space between the abutment tooth 80 and the free-end denture 10 at the time of occlusion, and food that cannot be bitten by being caught in such a space may be swallowed as it is, leading to indigestion in the gastrointestinal tract. Absent.

  As described above, since the grooved engaging portion 130 includes the groove portion 131, the protruding portion 220 can move freely within the groove portion within a predetermined range. Furthermore, the extending direction of the free-end denture 10 can be changed without difficulty within a predetermined angle range with respect to the central axis of the abutment tooth 80. Thereby, it is not necessary to apply an excessive force to the connection portion between the abutment tooth 80 and the free end denture 10 at the time of occlusion. Similarly, a comfortable wearing feeling can be given to the denture wearer, and the abutment tooth 80 can be made to last for a long time without applying excessive stress to the abutment tooth 80.

  As a result, it can be avoided that an excessive force is applied to the abutment tooth 80 to damage the periodontal ligament or crush the periodontal ligament itself, and loss of the valuable abutment tooth 80 can be prevented. Further, it is possible to prevent the gingiva 800 from being damaged due to the breakage of the joint portion of the denture and the problem of accidental ingestion of the damaged portion.

  In addition, when attaching the free end denture 10 to the abutment tooth 80, one end of the free end denture 10 is projected to 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 attached to the abutment tooth 80 by pressing the groove 131 provided in On the other hand, when removing the free end denture 10 from the abutment tooth 80, one end of the free end denture 10 from the protrusion 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.

  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 gingiva 800 where the retaining portion 135 and the denture base 120 of the free end denture 10 come into contact. 135 is not pressed against the gingiva 800, and the abutment tooth 80 of the free end denture 10 can be attached and detached easily and comfortably without pain.

  In particular, since the projecting portion 220 has a substantially spherical shape, the curved surface of the protruding portion is used to smoothly receive the resistance when the free end denture 10 is attached to or detached from the abutment tooth 80. It can be attached and detached. Further, when the free-end denture 10 is pressed or pulled against the abutment tooth 80 as the denture is attached or detached, a certain degree of freedom can be given in the pressing direction or the pulling direction. It becomes easy to do. As a result, a denture wearer who cannot move his fingertip dexterously can easily attach and detach the abutment tooth 80 of the free end denture 10 alone.

  As described above, the free-end denture 10 is unlikely to be detached from the abutment tooth 80 in a normal use state, and it is very easy to attach and detach the denture when pinching and attaching with a finger.

  Further, since the space S1 is formed between the gingiva 800 where the retaining portion 135 and the denture base 120 of the free end denture 10 come into contact with each other, the protrusion 220 of the metal crown 210 and the protrusion 220 after the free end denture 10 is removed. There is a wider gap between the gingiva 800 and the gingiva 800. By generating such a gap, a sufficient gap can be secured between the protrusion 220 and the upper surface of the gingiva 800 when the abutment tooth 80 is polished with a toothbrush after the free end denture 10 is removed. . As a result, it is possible to easily remove the eating residue of the food accumulated in the gap, the eating residue does not remain clogged, and the subsequent generation of tooth decay and bad breath can be prevented.

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

  In addition, in the state where the free end denture 10 is attached to the abutment tooth 80 and engaged, and the denture base 120 is pressed against the gingiva, a certain space S2 is formed between the end portion and the protruding portion. Even if the bite is bitten strongly, the occlusal force is not applied to the periodontal ligament 81 of the abutment tooth 80, and the progress of the degradation 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 inserted to engage the protruding portion 220, and the protruding portion 220 is held by the groove portion 131 only by the attractive force of the magnet 140. Thus, it is not necessary to strictly manage the dimensional tolerance between the groove 131 and the protrusion 220. Thereby, while being able to aim at the cost reduction in the groove part process of the denture 10, it can attach or detach easily when attaching and removing the denture 10 to the abutment tooth 80.

  If the magnetic force of the magnet 140 is made strong enough, the free end denture 10 can be firmly coupled to the abutment tooth 80 even with only the magnetic attraction. However, as shown in FIGS. 1 and 3, a concave portion 222 is provided at the lower portion of the spherical body that is the protruding portion 220, and the tip 136 of the retaining portion 135 is engaged with this portion to add to the attractive force of the magnet 140. By utilizing the lever engaging force as an auxiliary force, it is not necessary to adopt a complicated structure for preventing the protruding portion 220 from separating from the groove portion 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 structure in which the shape of the retaining portion 135 is changed according to the above description. Accordingly, the lower recessed portion 222 that engages the tip 136 of the retaining portion 135 provided in the lower portion of the projecting portion 220 of the first embodiment is not shown in the configuration shown in FIG. That is, in FIG. 6, the spherical protrusion part 220 without a dent is provided in the lower part. Even such a form belongs to the scope of the present invention.

  FIG. 7 is an explanatory diagram showing an example of attachment positions of the denture and its attachment 1 according to the first embodiment of the present invention shown in FIGS. 1 to 4. In this figure, the free end denture 10 according to the first embodiment is attached to the abutment tooth 80 on the missing back teeth on both sides of the lower tooth. You may attach to the missing part. 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 embodiment can be applied to any part without being limited to the attached state of FIG.

  In addition, according to circumstances, the free end denture 10 is provided with a fixing device such as a clasp at a position that is a free end portion opposite to the coupling side with the abutment tooth 80 and is difficult to see from the outside even when 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-mentioned embodiment, the protrusion part may comprise the substantially hemispherical shape. Even if the protruding portion has a substantially hemispherical shape, the above-described operation can be easily realized.

  Moreover, unlike the above-mentioned embodiment, the edge part on the opposite side to the retaining part of a groove part may be opened above the denture. Since the end on the opposite side of the retaining portion of the groove portion is opened above the denture, the configuration of the denture itself can be simplified, and the cost can be reduced.

  Subsequently, a modification of the above-described first embodiment will be described. FIG. 8 is a side view corresponding to FIG. 1 and showing a modification of the first embodiment. FIG. 9 is a plan view corresponding to FIG. 2 partially showing a modification of the first embodiment. In addition, about the structure equivalent to the above-mentioned embodiment, the code | symbol corresponding is attached | subjected as needed, and detailed description of the structure is abbreviate | omitted. In FIG. 9, cross-sectional hatching is omitted for easy understanding of the description.

  In this modification, the protrusion 260 is thinner in the thickness of the connection part 261 with the metal crown 210 than the other part of the protrusion 260. Further, the shape of the grooved engagement portion 160 is 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 configured so that the free end denture 10A can be attached to and detached from the abutment tooth 80 by a pushing force or a pulling force by a finger of the denture wearer. In addition to the magnetic attraction force that the magnet 140 exerts on the protrusion 260 when the free end denture 10A is mounted, the degree to which the protrusion 260 is prevented from detaching from the groove 161 due to the engaging force that the opening of the groove 161 exerts on the protrusion 260. Are dimensioned.

  If it demonstrates based on drawing, the groove width 161a of the abutment-tooth side opening part of the groove part 161 of the grooved engaging part 160 will be larger than the maximum width part of the protrusion part 260, that is, the diameter 260a of the protrusion part 260 in FIG. The groove width 161b inside the groove is slightly narrower 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 161 and the protrusion 260 has such a dimensional relationship that they are so-called latch-engaged with each other, once the protrusion 260 is engaged with the groove 161, the protrusion is coupled with the attractive force received from the magnet 140. 260 is difficult to be removed from the groove 161.

  As a result, once the free end denture 10A is attached to the abutment 80, the free end denture 10A is not easily detached from the abutment 80, and it can be firmly tasted and easily digested even with relatively hard food. You can bite and eat.

  Note that it is needless to say that the form of the retaining portion 137 whose tip is not hook-shaped as shown in FIG. 6 can also be applied to this modification.

  Next, the denture and its attachment according to the second embodiment of the present invention will be described in detail based on the drawings. The invention according to the second embodiment also relates to the invention of the mucosal burden type denture according to the first embodiment and its modification. Here, for the definition and technical significance of the mucosal burden denture, the contents described at the beginning of the embodiment for carrying out the invention are used.

  FIG. 10 is a partial side view showing a partial cross section of a denture according to a second embodiment of the present invention and its attachment. Moreover, FIG. 11 is a top view which shows the denture shown in FIG. 10 and its attachment attachment in a partial cross section. Moreover, Fig.12 (a) is a partial side view corresponding to FIG. 10 for demonstrating the effect | action of 2nd Embodiment. In addition, about the structure equivalent to the above-mentioned 1st Embodiment and its modification, corresponding code | symbol is attached | subjected to drawing suitably, and detailed description by text is abbreviate | omitted.

  In FIG. 10, only the left side portion of the denture is shown, but the right side has the same configuration, so the right side is not shown, and the left side symbol is appended with the symbol of the omitted right side in parentheses. I am doing so.

  The denture according to the second embodiment of the present invention and its attachment 2 (hereinafter simply referred to as “denture and its attachment 2” as appropriate) are supported at both ends by sandwiching the missing tooth portion of the remaining few teeth. These are dentures and attachments for attaching the intermediate missing tooth dentures 50 to the base teeth 91 and 92 (90) via attachments 60 and 70, respectively.

  The attachments 60 and 70 are the base ends of the abutment teeth 91 and 92 (90) on the peripheral surfaces of the metal crowns 610 and 710 with the metal crowns 610 and 710 placed on the abutment teeth 91 and 92 (90), respectively. Convex protrusions 630 and 740 made of a magnetic material extending from the portion toward the tip.

  The intermediate missing tooth denture 50 includes at least one denture body 510 (511, 512, 513,...), A denture base 520 to which the denture body 510 is attached, and the intermediate missing tooth denture 50 at both ends. Engagement parts attached to the respective abutment teeth 91 and 92 (90), and protruding protrusions 630 and 740 provided on the metal crowns 610 and 710 covering the abutment teeth 91 and 92 (90) slide. In the vicinity of both ends of the convex sliding engagement portions 530 and 540 to be fitted in a possible state and the intermediate missing tooth denture 50 and inside the joint portion side of the two abutment teeth 91 and 92 (90) Magnets 550 and 560 accommodated therein are provided.

  In the present embodiment, the protruding protrusions 630 and 740 have a substantially circular end view (plan view) as shown in FIGS. 9 and 10A, and the protruding sliding grooves 531 and 541 are convex. In order to hold the protrusions 630 and 740 in a slidable manner, the protrusions 630 and 740 have a substantially circular cross-sectional shape that is slightly larger than the outer diameter of the substantially circular outer surface in plan view.

  Further, the convex sliding engagement portions 530 and 540 formed at both ends of the intermediate missing tooth denture 50 are magnet holders 570 and 580 that extend to the opposite side to the protruding portion side as in the first embodiment. And is formed integrally. Similarly to the first embodiment, the protruding sliding engagement portions 530 and 540 and the magnet holders 570 and 580 are made of, for example, stainless steel having excellent durability, strength, and corrosion resistance, and the magnet holders 570 and 580 The portion is embedded in a denture body 510 made of denture resin. As a result, similarly to the first embodiment, the magnets 550 and 560 accommodated in the magnet holders 570 and 580 are not exposed to the outside of the intermediate missing tooth denture 50.

  And the convex protrusions 630 and 740 are slidably engaged with the convex sliding engagement parts 530 and 540 so that the intermediate missing tooth denture 50 has two abutment teeth 91 and 92 (90). , And the denture base 520 of the intermediate missing denture 50 is in close contact with the gingiva 800 while saliva is interposed on the entire bottom surface thereof, so that the intermediate missing denture 50 is attached to two abutments 91 and 92 ( 90).

  Further, the magnets 550 and 560 provided in the intermediate missing tooth denture 50 exert a magnetic pulling force on the protruding protrusions 630 and 740 of the metal crowns 610 and 710 provided in the vicinity thereof, whereby the intermediate missing tooth denture. 50 is prevented from being detached from the two abutment teeth 91 and 92 (90).

  Further, in a state where the intermediate missing tooth denture 50 is attached to the abutment teeth 91 and 92 (90), the intermediate missing tooth denture 50 is caused by a magnetic pulling force between the two abutment teeth 91 and 92 (90). In order to be able to translate the two abutment teeth 91 and 92 (90) in the vertical direction (longitudinal direction) by a predetermined amount while being held, the protruding protrusions of the metal crowns 610 and 710 630 and 740 are slidable within the convex sliding engagement portions 530 and 540 of the intermediate missing tooth denture 50.

  In addition, when the intermediate missing tooth denture 50 is attached, a predetermined gap is provided between the gingival side denture base side ends 530a and 540a of the ridge sliding engagement portions 530 and 540 and the gingiva 800 opposed thereto. Spaces S3 and S4 are formed.

  Further, the denture tip side ends 530b and 540b of the ridge sliding engagement portions 530 and 540 serve as a stopper for sliding movement of the ridge protrusions 630 and 740 and are blocked by the inner portion of the denture body 510. It is peeled off, so that when food is eaten, the food eating residue does not enter the protruding sliding engagement portion.

  When the denture base 520 extrudes the saliva D by the occlusal force during occlusion and compresses the gingiva 800 to sink the denture itself, the protruding protrusions 630 and 740 slide within the protruding sliding engagement portion. To rise. Then, in the state where the protruding protrusions 630 and 740 are fully raised in the protruding sliding engagement portion, the upper ends of the protruding protrusions 630 and 740 and the protruding protrusion sliding engagement portion 530 that opposes the protruding protrusions 630 and 740. Fixed spaces S5 and S6 are formed between the end portions 530b and 540b of the denture front side of 630. By remaining in such a space, the protruding protrusions 630 and 740 can leave a margin for further rising in the protruding sliding engagement portion, and the occlusal force is generated even when the teeth are strongly bitten. , 92 of the periodontal ligaments 81 and 82 is prevented from being crushed and the deterioration of the periodontal ligaments 81 and 82 is prevented.

  On the other hand, the denture base side ends 530a and 540a of the ridge sliding engagement portions 530 and 540 are open, and the abutment tooth when the intermediate missing tooth denture 50 is attached to the abutment teeth 91 and 92 (90). The upper ends of the protruding protrusions 630, 740 of 91, 92 (90) can be inserted into the protruding sliding groove.

  In addition, it is preferable to taper these insertion portions. Thus, when attaching the intermediate missing tooth denture 50 to the abutment teeth 91, 92 (90) at both ends, the protruding sliding engagement portions 530, 540 at both ends of the intermediate missing tooth denture 50 are connected to each abutment tooth. 91, 92 (90) can be simultaneously inserted into the protruding protrusions 630, 740 without difficulty, and the denture wearer can easily attach the intermediate missing denture denture 50 to the abutment teeth 91, 92 (90). It becomes possible.

  In addition, in order to easily fit the intermediate missing tooth denture 50 into the abutment teeth 91 and 92 (90) at both ends, the corner edges at the upper ends of the protruding protrusions 630 and 740 are chamfered or tapered. In addition, the lower end openings of the groove portions 531 and 541 formed on the denture base side end portions 530a and 540a of the protrusion sliding groove portions 531 and 541 at positions where the protrusion protrusion portions 630 and 740 enter are generally chamfered. Or have a tapered shape.

  FIG. 13 is an explanatory view showing an example of the attachment position of the denture and its attachment 2 according to the second embodiment shown in FIGS. 10 and 11. This figure shows an example in which the intermediate missing tooth denture 50 according to the second embodiment is attached by sliding from above with respect to the abutment teeth 91 and 92 (90) sandwiching the denture. In the same manner, the intermediate missing dental prosthesis 50 may be slid from below and attached to the missing tooth portion sandwiched between the upper two teeth.

  Even in the case where the intermediate missing tooth denture 50 according to this embodiment is attached to the missing portion of the upper tooth, the magnets 550 and 560 hold the protruding protrusions 630 and 740 by the magnetic pulling force, respectively. When the denture base 520 is brought into contact with the upper gum 800 through saliva, the intermediate missing denture 50 can be securely attached to the abutment tooth 90.

  As described above, in addition to the arrangement state shown in FIG. 13, if there is an intermediate missing portion of the tooth between at least one of the two abutment teeth 91 and 92 (90), regardless of the upper and lower teeth. This embodiment can be applied.

  When the intermediate missing dental prosthesis 50 according to the second embodiment of the present invention is attached to the abutment teeth 91, 92 (90) at both ends, various problems described in the column of problems to be solved by the present invention. Can be solved all at once.

  Specifically, both ends of the intermediate missing dental prosthesis 50 can slide in parallel with the abutment teeth 91 and 92 (90) with a little play as described above. The intermediate missing denture 50 can be moved only in the vertical direction defined by play. This prevents the occurrence of problems that occur when fixed to the abutment teeth 91, 92 (90) at both ends, such as a conventional denture for supporting both ends, without any play. That is, according to the present embodiment, the occlusal force received from the opposite teeth during upper and lower occlusions is not excessively applied to the both-end supporting denture. As a result, the denture is easily damaged, and the joint part with the damaged abutment teeth 91 and 92 (90) does not damage the gum 800, and a part of the joint part itself becomes a fragment and becomes in the mouth. This eliminates the conventional problems that can cause accidental ingestion.

  Further, since the space S described above exists, when the abutment teeth 91 and 92 (90) are brushed with a toothbrush after the intermediate missing dental prosthesis 50 is removed, the same as in the first embodiment and the modification thereof. In addition, a sufficient gap can be ensured between the gingival-side lower ends of the protruding protrusions 630 and 740 and the gingival upper surface facing the gingival-side lower ends. As a result, the food waste accumulated in the gap can be easily removed. As a result, these portions do not remain clogged in this portion, and subsequent generation of decay and bad breath can be prevented.

  Further, the denture tip side end portions 530b and 540b of the ridge sliding engagement portions 530 and 540 are blocked, so that when the food is bitten, the ridge sliding engagement portions 530 and 540 have food. Part of it can be prevented from entering.

  Thereby, the denture wearer can enjoy a comfortable wearing feeling and a biting feeling of the intermediate missing denture 50 in occlusion. As a result, as described above, the user can continue to bite comfortably while biting the food, and can enjoy a meal without being stressed. Thereby, the maintenance of the health especially important for elderly people and the improvement in a physical condition can be aimed at by aiming at good digestion absorption of food.

  Subsequently, a modification of the above-described second embodiment will be described. FIG. 14B is a plan view partially showing the first modification of the second embodiment, FIG. 14C is a plan view partially showing the second modification, and FIG. FIG. 10 is a plan view partially showing a third modification.

  14 and 15, only the left side portion of the denture is shown, but the right side has the same configuration. Therefore, the right side is not shown, and the reference number of the omitted portion on the right side is shown in parentheses. I try to write it.

  In these modified examples, the end surface view of the protruding protrusion is changed to a substantially circular shape, and the cross-sectional shape of the protruding groove sliding groove for engaging and sliding is changed to a protruding protrusion. It has been changed to match the shape.

  Specifically, as shown in FIG. 14B, the shape of the protruding protrusions 632 and 742 may be substantially rectangular when viewed from the end, that is, from the upper surface side of the denture. In this case, the cross-sectional shape of the ridge sliding groove portions 532 and 542 is a substantially rectangular shape that is slightly larger than the ridge protrusion portions 632 and 742.

  Moreover, as shown in FIG.14 (c), the shape of the protruding item | line protrusion part 633,743 may be substantially triangular shape seeing from an end surface view, ie, the upper surface side of a denture. In this case, the cross-sectional shape of the ridge sliding groove portions 533 and 543 is a substantially triangular shape that is slightly larger than the ridge protrusion portions 633 and 743.

  Further, as shown in FIG. 14 (d), the shape of the protruding protrusions 634 and 744 is a so-called mushroom shape in which the shape of the protrusions 634, 744 is an end view, that is, a semicircular shape when viewed from the upper surface side of the denture It may be (an irregular semi-circular shape). In this case, the cross-sectional shape of the ridge sliding groove portions 534 and 544 is an irregular mushroom shape (an irregular substantially semicircular shape) slightly larger than the ridge protrusion portions 634 and 744.

  In the three modified examples described above, the upper edge of each protruding protrusion is chamfered so that the intermediate missing dental prosthesis 50 can be easily fitted into the abutment teeth 91 and 92 (90) at both ends. It is preferable that the opening is at the lower end of each protruding groove sliding groove and into which each protruding protrusion protrudes is chamfered or tapered.

  Even if it is a structure like each modification demonstrated above, it can fully exhibit the effect | action of the denture based on this invention for attaching the denture 50 for intermediate | middle defect teeth, and its attachment attachment.

  Finally, further modified examples different from the above-described second embodiment and modified examples will be described. FIG. 15 is a side view showing a fourth modification of the second embodiment. In this fourth modified example, which is a further modified example, the length of the groove in the direction of the groove is adapted to engage with sliding in the vicinity of the substantially central portion of the protruding groove sliding grooves 535 and 545 instead of the protruding protrusion. The metal crowns 610 and 710 are provided with projections 635 and 745 having a substantially circular shape in a short plan view and a sufficient plate thickness. Even if it is such a structure, the effect | action of the denture based on this invention for attaching the denture 50 for intermediate | middle defect teeth and its attachment attachment can fully be exhibited.

  Note that FIG. 15 is a plan view, that is, a substantially circular shape similar to that of the second embodiment when viewed from the upper surface side of the denture, but the shape of the protrusion is not limited to this. It may be oval, substantially rectangular, substantially triangular, or the above-mentioned irregular semicircular shape (mushroom shape). In this case, the cross-sectional shape of the ridge sliding groove portion into which the protruding portion is slidably fitted may be appropriately changed according to the shape of these protruding portions in plan view.

  Also in the fourth modified example, the upper edge corner edge of the protrusion is chamfered over the entire circumference so that the intermediate missing tooth denture 50 can be easily fitted into the abutment teeth 91 and 92 (90) at both ends. In addition to being tapered, the opening at the lower end of the ridge sliding groove portions 535 and 545 and into which the protrusion is inserted is preferably chamfered or tapered.

  In addition, each above-mentioned embodiment and each modification related to this are only what showed the exemplary aspect of this invention to the last, and if it is in the range which can exhibit the effect of this invention, these will be shown. Needless to say, the present invention includes various modifications equivalent to the embodiments.

  Therefore, for example, in the first embodiment and the modified example thereof, the groove width of the groove portion does not have to be the same in the groove extending direction as long as the protruding portion can be engaged, and has an elongated elliptical shape in the vertical direction. Also good.

  Further, for example, in each of the above-described embodiments and the modifications thereof, the denture body has been described as being two or more, but only one is included in the scope of the present invention. Moreover, in 2nd Embodiment, although the opening of the denture front end side edge part was obstruct | occluded by the convex sliding engagement part, it may be obstruct | occluded directly by a part of denture main body instead. Needless to say.

  Needless to say, the definitions of the substantially spherical body and the substantially circular shape in the first embodiment, the second embodiment, and the modifications thereof include so-called egg shape and elliptical shape.

  Furthermore, although it demonstrated on the assumption that it is a natural tooth as an abutment tooth in each above-mentioned embodiment and its various modifications, even if it is a case where an implant is used instead of a natural tooth as an abutment tooth, the implant A sufficient effect can be achieved by attaching the metal crown according to the present invention.

  Specifically, even when it is necessary to prevent the occlusal force from being applied to the implant as the abutment tooth according to the age and occlusal force of the denture wearer, this denture and its attachment attachment are extremely useful roles. Can be fulfilled. The reason for this is that if the denture wearer is older, or if it is a denture wearer who always has a habit of strongly biting with regard to the bite force with individual differences, a so-called traumatic occlusion may occur. is there.

  Once traumatic occlusion occurs, the implant implant is damaged and inflamed, and in the worst case, the implant itself is destroyed, making it impossible to mount the denture. In order to avoid such a situation, it is desirable to avoid applying an occlusal force as much as possible to the implant.

  By using the denture according to the present invention and its attachment when there is such a possibility, it becomes possible to continue using the denture with peace of mind, as is apparent from the above detailed description.

  Therefore, even if the denture is an implant instead of a natural tooth, it is obvious that the present invention can be applied with sufficient effects and belongs to the scope of the present invention.

1, 2 Dentures and their attachments 10, 10A Free end dentures 20 Attachments 50 Intermediate dentures Dentures 60, 70 Attachments 80 Abutment teeth 81, 82 Periodontal membranes 91, 92 (90) (Both ends) Abutment teeth 110 (111, 112, 113,...) Denture body 120 Denture base 130 Groove engaging portion 131 Groove portion 135 Retaining portion 136 Tip 137 Retaining portion 140 Magnet 150 Magnet holder 160 Grooving engaging portion 161 Groove portion 161a Abutment Groove width of tooth side opening portion 161b Groove width inside groove 210 Metal crown 220 Protruding portion 221 Base end portion 222 Lower side recessed portion 260 Protruding portion 260a Diameter 261 Connection portion 510 (511, 512, 513, ...) Denture body 520 Denture base 530, 540 Protruding sliding engagement portion 530a, 540a Denture base side Portions 530b, 540b Ends on the denture tip side 531, 541 Protruding sliding groove 532, 542 Protruding sliding groove 533, 543 Protruding sliding groove 534, 544 Protruding sliding groove 535, 545 Protruding sliding groove 550 , 560 Magnet 570, 580 Magnet holder 610, 710 Metal crown 630, 740 Projection protrusion 632, 742 Projection protrusion 633, 743 Projection protrusion 634, 744 Projection protrusion 635, 745 Projection 800, 801 802 Gingiva S1, S2, S3, S4 Space D Saliva

Claims (10)

A denture that attaches a free-end denture to a single abutment and its attachment,
The mounting attachment has a metal crown to be attached to the one abutment tooth, and a protrusion made of a magnetic body provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved.
The protrusion 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. A grooved engagement portion disposed on the end side, and the grooved engagement portion as viewed in the mounted state of the denture in a position adjacent to the grooved engagement portion inside the free end denture. A magnet disposed at a position opposite to the abutment tooth,
The groove formed in the grooved engagement portion extends in a direction connecting the denture base and the denture body,
In the grooved engagement portion, a groove portion is formed in a direction from the denture base toward the denture body,
The protruding portion protrudes from the side surface of the metal crown as viewed in the mounted state of the denture in a direction in which the protruding portion can be engaged in the groove portion of the grooved engaging portion,
The free end denture is coupled to the abutment tooth by seeing the free end denture attached to the abutment tooth, and the protruding portion is engaged with the groove portion of the grooved engagement portion. With the denture base of the free end denture coming into contact with the gingiva, the free end denture is attached to the abutment tooth,
The magnet causes a magnetic pulling force to act on the projecting portion made of the magnetic material so that the free end denture does not leave the abutment tooth,
In a state where the free end denture is attached to the abutment tooth, the protrusion is movable along the groove while applying a magnetic pulling force to the protrusion, and the protrusion is formed on the groove. The extension direction of the free-end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth in a state where it remains at a predetermined position in the extension direction ,
The groove portion is provided with a recessed protrusion-like retaining portion on the denture base side of the groove portion so that the protruding portion does not come off from the groove portion when the denture is mounted, and the tooth portion side of the groove portion The end portion is blocked by a part of the denture, and the free end denture is attached to the abutment tooth to be occluded, and the denture base is pressed against the gingiva by receiving the occlusal force and sinks. The denture does not contact the end of the tooth tip side, and both are spaced apart from each other by a certain space, and the attachment thereof. A denture that attaches a free-end denture to a single abutment and its attachment,
The mounting attachment has a metal crown to be attached to the one abutment tooth, and a protrusion made of a magnetic body provided at a predetermined position around the metal crown and having at least a part of the peripheral surface curved.
The protrusion 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. A grooved engagement portion disposed on the end side, and the grooved engagement portion as viewed in the mounted state of the denture in a position adjacent to the grooved engagement portion inside the free end denture. A magnet disposed at a position opposite to the abutment tooth,
The groove formed in the grooved engagement portion extends in a direction connecting the denture base and the denture body,
In the grooved engagement portion, a groove portion is formed in a direction from the denture base toward the denture body,
The protruding portion protrudes from the side surface of the metal crown as viewed in the mounted state of the denture in a direction in which the protruding portion can be engaged in the groove portion of the grooved engaging portion,
The free end denture is coupled to the abutment tooth by seeing the free end denture attached to the abutment tooth, and the protruding portion is engaged with the groove portion of the grooved engagement portion. With the denture base of the free end denture coming into contact with the gingiva, the free end denture is attached to the abutment tooth,
The magnet causes a magnetic pulling force to act on the projecting portion made of the magnetic material so that the free end denture does not leave the abutment tooth,
In a state where the free end denture is attached to the abutment tooth, the protrusion is movable along the groove while applying a magnetic pulling force to the protrusion, and the protrusion is formed on the groove. The extension direction of the free-end denture can be changed within a predetermined angle range with respect to the central axis of the abutment tooth in a state where it remains at a predetermined position in the extension direction ,
The groove portion is provided with a recessed protrusion-like retaining portion on the denture base side of the groove portion so that the protruding portion does not come off from the groove portion when the denture is mounted, and the tooth portion side of the groove portion In the state where the end is opened above the denture, and the free end denture is attached to the abutment tooth and bitten, and the denture base is pressed against the gingiva by receiving an occlusal force, the protruding portion is not hit the tooth tip end, both justified teeth you characterized in that spaced apart at regular space the mounting attachment. In a state where the free end denture is attached to the abutment tooth, the retaining portion is arranged to be opposed to the gingiva with which the denture base of the free end denture contacts with a certain space therebetween. The denture according to claim 1 or claim 2 and its attachment. The groove width of the groove portion is a groove width that does not interfere with each other when inserted in order to engage the protruding portion with the groove portion, and in the state where the free end denture is attached to the abutment tooth, The denture according to claim 1 or 2 , wherein the protruding portion of the crown is engaged with the groove portion only by the attractive force of the magnet provided on the free end denture. The protrusion has a base end on the connection side with the metal crown that is thinner than other portions of the protrusion, and the groove width of the opening of the groove is determined by the attachment of the free end denture. In order to make the free end denture detachable with respect to the abutment tooth by pushing force or pulling force by a person's finger, in addition to the magnetic attractive force exerted on the protrusion by the magnet, the opening of the groove portion is The protrusion is smaller than the maximum width portion of the protrusion so as to prevent the protrusion from being detached from the groove due to the engaging force exerted on the protrusion, and the protrusion can slide within a predetermined range within the groove. 3. The denture according to claim 1 or 2 , wherein the groove width inside the groove is larger than the groove width of the opening. 6. The denture according to claim 5 , wherein the protruding portion is a substantially spherical body. The amount of displacement of the protrusion relative to the extending direction of the groove when the free end denture is attached to the abutment tooth is pressed against the gingiva of the free end denture during occlusion. The denture according to any one of claims 1 to 6, characterized in that it is defined so as to receive an occlusal force from the denture and a tooth facing the abutment tooth by the free end denture. . The denture according to any one of claims 1 to 7 , wherein an implant is used instead of a natural tooth as the abutment tooth, and the metal crown is attached to the implant. . A metal crown having a protrusion, which is used for the denture according to any one of claims 1 to 7 and its attachment. A free-end denture used for the denture according to any one of claims 1 to 7 and its attachment.

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