JP2021069943A - Artificial tooth and fitting attachment therefor - Google Patents

Abstract

To provide an artificial tooth and a fitting attachment therefor that provide an artificial tooth wearer with an excellent wearing feeling and a comfortable masticating feeling during a meal.SOLUTION: Occlusion is performed by fitting a separation end artificial tooth 10-2 to an abutment tooth 80-2. Upon receiving occlusal force, an artificial tooth plate 120-2 is pressed against a gingiva 800-2 and the artificial tooth receives the occlusal force. Thereby, a projection part 220-2 for engagement moves along a groove part 131-2 of a magnetic member 130-2 with a groove for projection part sliding engagement. Thereby, the artificial tooth itself is depressed into the gingiva, and the artificial tooth receives reaction force from the gingiva. As force opposing the occlusal force, the reaction force is balanced with the occlusal force, which enables occlusion action of an artificial tooth wearer.SELECTED DRAWING: Figure 10

Description

The present invention relates to a denture and its attachment.

Originally, if the teeth are treated properly, there is little need to wear dentures or implant implants, but in reality this does not work, and the older you get, the more you wear dentures or implants. There is a need to embed it. In Japan, where the proportion of elderly people is rapidly increasing, the opportunities and needs for dentures and implants are rapidly increasing, especially with the advent of an aging society in recent years.

However, when a denture is attached, a metal fitting called a clasp must be fitted into the remaining tooth to fix it. With this fixing method, for example, when you open your mouth wide and laugh unintentionally during a conversation, the metal part of the clasp that fits the abutment teeth can be seen from the gap between the teeth, which is embarrassing. Sometimes I feel like I can't enjoy the conversation.

In addition, if a denture equipped with a clasp is used for a long period of time, the clasp itself will be plastically deformed and the denture will easily come off. It will take.

In some cases, the clasp itself may be cut due to extreme stress applied to a part of the clasp or fatigue failure due to long-term use, and the cut end may be cut into the gingiva and injured unexpectedly. May cause. Furthermore, a part of such a clasp may be broken into fragments and swallowed as they are without being noticed, which may lead to unexpected illness due to accidental ingestion of a foreign substance.

On the other hand, instead of fitting a denture using a clasp, implanting an implant in a missing part of the tooth has become widespread in recent years. However, the cost per implant is high to implant, and if you try to implant multiple implants, the cost will increase considerably. Also, especially in the elderly, if the jaw bone is fragile or the bone itself is thin, if you forcibly implant the implant, a part of the embedded part will damage the nerve at the root of the tooth. It may cause serious problems such as continuous pain and paralysis.

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

Japanese Unexamined Patent Publication No. 9-51902 Japanese Unexamined Patent Publication No. 2004-97591 Japanese Unexamined Patent Publication No. 7-136189

The dentures disclosed in the prior patent documents 1 to 3 are configured by using a magnet, but there is no so-called play in the abutment tooth to which the denture is attached, that is, the upper tooth and the lower tooth. It is designed so that it can be installed without any deviation in the direction in which the teeth occlude and in the direction orthogonal to this direction.

Therefore, when the denture is bitten and the occlusal force is applied to the denture, the displacement in the direction in which the denture shifts (escapes) with respect to the direction in which the denture is bitten is completely regulated.

As a result, for example, even if there is a slight step 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. The food that has entered the gap created by the step is not completely bitten and is swallowed as it is, causing indigestion and putting 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 at the time of occlusal. As a result, the mounting portion of the magnet may be damaged and a part thereof may be accidentally 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 is attached to the abutment tooth and acts as a cushion is crushed ( (Plastic deformation) eventually causes the abutment tooth to be damaged.

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

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 mounting attachment has a metal crown to be attached to the one abutment tooth, and a magnetic member with a groove for sliding engagement of a protruding portion made of a magnetic material and provided at a predetermined position around the metal crown.
The groove portion of the grooved magnetic member for sliding engagement of the protruding portion is formed so as to extend along the vertical direction of the crown covered with the metal crown.
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. It has a protruding portion arranged on the end side and a magnet arranged inside the free end denture and adjacent to the protruding portion.
The protruding portion has a substantially spherical shape or a substantially hemispherical shape, and when viewed in the mounted state of the denture, the protruding portion from the abutment tooth side end portion to the protruding portion sliding engagement grooved magnetic member. It protrudes toward you,
When the free end denture is attached to the abutment tooth, the protruding portion engages with the groove portion of the grooved magnetic member for sliding engagement of the protruding portion, so that the free end denture becomes the abutment tooth. The free end denture is attached to the abutment tooth by contacting the denture base of the free end denture with the gingiva.
The magnet is arranged so that the magnetic tensile force generated from one of the magnetic poles inside the free-end denture is oriented substantially parallel to the gingiva in which the denture base is in contact with the protruding magnetic member with a groove for sliding engagement. Is located in
The magnet exerts a magnetic tensile force on the grooved magnetic member for sliding engagement of the protruding portion so that the free end denture does not separate from the abutment tooth.
In a state where the free end denture is attached to the abutment tooth, the free end denture is provided on the abutment tooth side end portion while applying a magnetic tensile force to the protruding portion sliding engagement grooved magnetic member. The free end denture extends in a state where the portion is movable along the groove portion of the magnetic member with a groove for sliding engagement of the protruding portion and the protruding portion remains at a predetermined position in the extending direction of the groove portion. The current direction can be changed within a predetermined angle range with respect to the central axis of the abutment tooth.
The free end denture is attached to the abutment tooth and occluded, and the denture base is pressed against the gingiva by receiving the occlusal force, and the denture receives the occlusal force, so that the protruding portion is the grooved magnetic material. By moving along the groove of the denture, the denture itself sinks into the gingiva, so that the denture receives a reaction force from the gingiva.
The repulsive force is balanced with the occlusal force as a force against the occlusal force, thereby enabling the denture wearer to perform an occlusal motion.

Further, the denture and its attachment attachment according to claim 2 of the present invention are the denture and its attachment attachment according to claim 1.
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 3 of the present invention is
A metal crown having a protruding portion, which is used for the denture according to claim 1 or 2 and an attachment thereof.

Further, the free end denture according to claim 4 of the present invention is
A free-end denture according to claim 1 or 2, characterized in that it is used in the denture and its attachment.

According to the present invention, it is possible to provide a denture and its attachment attachment, which makes it easy to attach and detach the denture and can give the denture wearer an excellent wearing feeling and a comfortable biting feeling during meals.

It is a side view which shows the structure of the denture and its attachment attachment which concerns on the 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 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 the related embodiment shown in FIGS. 1 to 4. FIG. It is a side view corresponding to FIG. 1 which shows the modification of the related embodiment. It is a top view corresponding to FIG. 2 which partially shows the modification of the related embodiment. It is a side view which shows the state which attached the denture which concerns on this Embodiment about this invention and the attachment attachment thereof to an abutment tooth by a partial cross section. It is a side view corresponding to FIG. 10 which shows an example of the denture, its attachment attachment and movement which concerns on this Embodiment when the occlusal force is applied from the state shown in FIG.

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.

Subsequently, the related invention will be described in advance in explaining the present invention. 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.

First, the denture and its attachment attachment according to the 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 a 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 related embodiment of the present invention are a free end denture 10 attached to one abutment tooth 80 and its attachment attachment 20. Consists of.

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 this related 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.

By having such a configuration in this related embodiment, the magnet 140 is not exposed in the mouth of the denture wearer, the material of the magnet 140 makes the taste uncomfortable, and the fragments of the magnet 140 are in the mouth. It prevents you from getting inside.

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 (this related 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 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 lower 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 attract the magnet 140. In addition, 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 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 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 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 the denture and its mounting attachment 1 according to the related embodiment of the present invention shown in FIGS. 1 to 4. In this figure, the free-end denture 10 according to this related embodiment is attached to the abutment tooth 80 to the missing back teeth on both sides of the lower tooth, but the upper tooth is missing in the same manner. It may be attached to a 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 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 related embodiment described above will be described. FIG. 8 is a side view corresponding to FIG. 1 showing a modified example of the related embodiment. Further, FIG. 9 is a plan view corresponding to FIG. 2 which partially shows a modified example of the 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.

Subsequently, the denture and its attachment attachment according to the second embodiment of the present invention will be described in detail with reference to the drawings. The invention according to the second embodiment also relates to the invention of the mucosal burden type denture according to the related embodiment and the modified example thereof. Here, as for the definition of the mucosal burden type denture and its technical significance, the contents described at the beginning of the embodiment for carrying out the invention are diverted.

FIG. 10 is a partial side view showing a denture and its attachment attachment according to the second 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. 12A is a partial side view corresponding to FIG. 10 for explaining the operation of the second embodiment. Regarding the above-mentioned related embodiments and the same configurations as the modified examples thereof, the corresponding reference numerals are appropriately attached to the drawings, and detailed description in sentences will be omitted.

In FIG. 10, only the left side portion of the denture is shown, but since the right side has the same configuration, the illustration on the right side is omitted, and the code of the omitted part on the right side is attached in parentheses to the code on the left side. I am trying to do it.

Further, although the above description has been made on the premise that the abutment tooth is a natural tooth in each of the above-described embodiments and various modifications thereof, even if an implant is used as the abutment tooth instead of the natural tooth, the implant is used. A sufficient effect can be obtained by attaching the metal crown according to the present invention to the tooth.

Specifically, this denture and its attachment attachment play an extremely useful role even when it is necessary to minimize the occlusal force applied to the implant as an abutment tooth according to the age and occlusal force of the denture wearer. Can be fulfilled. The reason for this is that if the denture wearer is older, or if the denture wearer has a habit of always biting strongly with respect to the occlusal force that varies from person to person and a large occlusal force is constantly applied, so-called traumatic occlusion may occur. is there.

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

When there is such a risk, by using the denture according to the present invention and its attachment, it is possible to continue using the denture with peace of mind as is clear from the detailed description described above.

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

Subsequently, an embodiment of the present invention (hereinafter, referred to as “the present embodiment”) will be described. Since the shapes, materials, and dimensional relationships of each component of the present embodiment are equivalent except for the relative arrangement of some components, the reference numerals of the components are related to the above. A "-2" is added to each reference numeral of the embodiment to facilitate understanding of the invention. Further, with respect to the constituent requirements not described in the following description, the description of the symbols in the drawings is omitted because they are exactly the same as those of the related embodiments described above.

FIG. 10 is a side view showing a state in which the denture and its attachment attachment according to the present embodiment according to the present invention are attached to the abutment tooth in a partial cross section. Further, FIG. 11 is a side view corresponding to FIG. 10 showing an example of the denture, its attachment attachment and movement according to the present embodiment when an occlusal force is applied from the state shown in FIG.

The present embodiment relates to a denture that attaches a free end denture 10-2 to one abutment tooth 80-2 and its attachment attachment 1-2. The mounting attachment 20-2 is provided at a predetermined position around the metal crown 210-2 to be mounted on one abutment tooth 80-2 and the metal crown 210-2, and is for sliding engagement of a protruding portion made of a magnetic material. It has a grooved magnetic member 130-2. Further, the groove portion 131-2 of the grooved magnetic member 130-2 for sliding engagement of the protruding portion is formed extending along the vertical direction of the crown covered with the metal crown 210-2.
The denture consists of a free end denture 10-2, the free end denture 10-2 having at least one denture body 110-2 (111-2, 112-2,) attached adjacent to the abutment tooth 80-2. 113-2, ...), the denture base 120-2 that supports the denture body 110-2 (111-2, 112-2, 113-2, ...), and the abutment tooth 80-2 adjacent to each other. It has an engaging protrusion 220-2 arranged on the end side and a magnet 140-2 arranged inside the free end denture 10-2 and adjacent to the engaging protrusion 220-2. ing.

The engaging protrusion 220-2 has a substantially spherical or substantially hemispherical shape, and has a groove for sliding engagement of the protruding portion from the abutment tooth side end of the free end denture 10-2 when viewed in the mounted state of the denture. It protrudes toward the magnetic member 130-2.

Then, when the free end denture 10-2 is attached to the abutment tooth 80-2, the engaging protrusion 220-2 is attached to the groove 131-2 of the protruding portion sliding engaging grooved magnetic member 130-2. By engaging, the free end denture 10-2 is connected to the abutment tooth 80-2, and the denture base 120-2 of the free end denture 10-2 comes into contact with the gingiva 800-2, so that the free end denture 10-2 is attached to the abutment tooth 80-2.

The magnet 140-2 is the gingiva in which the denture base 120-2 is in contact with the magnetic pulling force generated from one of the magnetic poles inside the free-end denture 10-2 toward the protruding magnetic member 130-2 with a groove for sliding engagement. It is arranged so as to be oriented substantially parallel to 800-2.

The magnet 140-2 exerts a magnetic tensile force on the protruding portion sliding engagement grooved magnetic member 130-2 to prevent the free end denture 10-2 from separating from the abutment tooth 80-2.

Then, in a state where the free end denture 10-2 is attached to the abutment tooth 80-2, the free end denture 10-2 is moved while applying a magnetic tensile force to the grooved magnetic member 130-2 for sliding engagement of the protruding portion. The engaging protrusion 220-2 provided on the abutment tooth side end can be moved along the groove 131-2 of the protruding portion sliding engaging grooved magnetic member 130-2, and the engaging protruding portion. When 220-2 stays at a predetermined position in the extending direction of the groove 131-2, the extending direction of the free end denture 10-2 changes within a predetermined angle range with respect to the central axis of the abutment tooth 80-2. You can do it.

Further, the free end denture 10-2 is attached to the abutment tooth 80-2 to occlude, and the denture base 120-2 is pressed against the gingiva 800-2 by receiving the occlusal force, and the denture receives the occlusal force. The denture itself sinks into the gingiva 800-2 by moving the engaging protrusion 220-2 along the groove 131-2 of the protruding portion sliding engaging grooved magnetic member 130-2 from the gingiva 800-2. The denture is designed to receive the reaction force of.

The repulsive force balances the occlusal force as a force that opposes the occlusal force, thereby enabling the denture wearer to perform the occlusal motion.

In the present embodiment, an implant may be used as the abutment tooth 80-2 instead of the natural tooth, and a metal crown 210-2 may be attached to the implant.

As a feature of the present invention, since the magnet 140-2 is arranged so as to extend in the extending direction of the free end denture 10-2, the denture body 110-2 provided in the free end denture 10-2 ( The size of the magnet 140-2, that is, the size of the magnetic tensile force exerted on a substantially spherical body made of a magnetic material can be adjusted according to the number of 111-2, 112-2, 113-2, ...). As a result, the number of denture bodies 110-2 (111-2, 112-2, 113-2, ...) Is large, and the free-end denture 10-2 having a long length in the longitudinal direction is attached to the abutment tooth 80-. A sufficiently large magnetic tensile force that does not easily come off when mounted on the abutment tooth 80-2 can be applied to a grooved magnetic member which is a magnetic material provided on the metal crown 210-2 of the abutment tooth 80-2.

In particular, since the size of the magnetic member 130-2 with a groove for sliding engagement of the protruding portion is naturally larger than that of the protruding portion 220-2 for engagement, the extension of the denture base 120-2 of the free end denture 10-2 The magnetic tensile force of the magnet 140-2 arranged in the existing direction sufficiently acts on the grooved magnetic member 130-2 for sliding engagement of the protrusion.

Thereby, by changing the size of the magnet 140-2, one end of the free end denture 10-2 can be firmly held by each abutment tooth 80-2.

In this way, for example, a magnetic tensile force that is even larger than when the metal crown 210-2 is provided with the engaging protrusion 220-2 is applied to the protruding portion sliding engaging grooved magnetic member 130-2. Therefore, a relatively large number of denture bodies (artificial teeth) 110-2 (111-2, 112-2, 113-2, ...) Are released (the denture base 120-2 is long in the longitudinal direction). The end denture 10-2 should also be firmly attached to the abutment tooth 80-2 so that it will not come off when it is occluded or when it is not occluded but when going out in daily life. it can.

Further, according to the present invention, instead of attaching the elongated and small engaging protrusion 220-2 to the metal crown 210-2, the protruding portion sliding engaging grooved magnetic member 130-which is considerably larger than this is attached. 2 will be attached. That is, the contact area between the protruding portion sliding engaging grooved magnetic member 130-2 and the metal crown 210-2 is considerably larger than when the engaging protruding portion 220-2 is provided on the metal crown 210-2. As a result, even if the free end denture 10-2 is used for a long period of time using an adhesive having sufficient adhesive strength, the grooved magnetic member 130-2 for sliding engagement of the protruding portion is peeled off from the metal crown 210-2. It is possible to prevent the denture.

Furthermore, if the magnetic member itself with a groove for sliding engagement of the protrusion is mass-produced in advance and stored as a unit, the sliding engagement with the protrusion is repeated for a long period of time, and the protrusion slides. Even if the groove 131-2 of the magnetic member 130-2 with a groove for dynamic engagement is worn, it is replaced with a new magnetic member 130-2 with a groove for sliding engagement by visiting the dental clinic only a few times. be able to.

Further, as described above, the metal crown 210-2 is provided with a grooved engaging portion having a size larger than that of the convex protrusion made of a magnetic material, so that the magnet 140 is arranged inside the free end denture 10-2. By stably receiving a sufficient magnetic tensile force from -2 for a long period of time, it is possible to solve all the problems that occur when the normally used free end denture 10-2 with a clasp is used continuously.

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 protruding portion for engaging the denture, which is housed in the groove for engaging the abutment tooth. 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.

1 Denture and its mounting attachment 10, 10A Free end denture 20 Mounting attachment 80 Abutment tooth 81 Denture root membrane 110 (111, 112, 113, ...) Denture body 120 Prosthesis bed 130 Grooved engaging part 131 Groove 135 Retaining Part 136 Tip 137 Retaining part 140 Magnet 150 Magnet holder 160 Grooved engaging part 161 Groove 161a Groove width of abutment tooth side opening 161b Groove width inside groove 210 Metal crown 220 Prosthesis engaging protruding part 221 Base end 222 Lower dent 260 Prosthesis engagement protrusion 260a Diameter 261 Connection part 800 Denture S1, S2, S3, S4 Space D Saliva 10-2 Free end denture 80-2 Abutment tooth 110-2 (111-2, 112-2) , 113-2, ...) Denture body 120-2 Denture base 130-2 Protruding part Sliding engaging grooved magnetic member 131-2 Groove 14-2 Magnet 210-2 Metal crown 220-2 Engaging protruding part 800 -2 Denture

Claims (4)

A denture that attaches a free end denture to a single abutment tooth and its attachment attachment.
The mounting attachment has a metal crown to be attached to the one abutment tooth, and a magnetic member with a groove for sliding engagement of a protruding portion made of a magnetic material and provided at a predetermined position around the metal crown.
The groove portion of the grooved magnetic member for sliding engagement of the protruding portion is formed so as to extend along the vertical direction of the crown covered with the metal crown.
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. It has a protruding portion arranged on the end side and a magnet arranged inside the free end denture and adjacent to the protruding portion.
The protruding portion has a substantially spherical shape or a substantially hemispherical shape, and when viewed in the mounted state of the denture, the protruding portion from the abutment tooth side end portion to the protruding portion sliding engagement grooved magnetic member. It protrudes toward you,
When the free end denture is attached to the abutment tooth, the protruding portion engages with the groove portion of the grooved magnetic member for sliding engagement of the protruding portion, so that the free end denture becomes the abutment tooth. The free end denture is attached to the abutment tooth by contacting the denture base of the free end denture with the gingiva.
The magnet is arranged so that the magnetic tensile force generated from one of the magnetic poles inside the free-end denture is oriented substantially parallel to the gingiva in which the denture base is in contact with the protruding magnetic member with a groove for sliding engagement. Is located in
The magnet exerts a magnetic tensile force on the grooved magnetic member for sliding engagement of the protruding portion so that the free end denture does not separate from the abutment tooth.
In a state where the free end denture is attached to the abutment tooth, the free end denture is provided on the abutment tooth side end portion while applying a magnetic tensile force to the protruding portion sliding engagement grooved magnetic member. The free end denture extends in a state where the portion is movable along the groove portion of the magnetic member with a groove for sliding engagement of the protruding portion and the protruding portion remains at a predetermined position in the extending direction of the groove portion. The current direction can be changed within a predetermined angle range with respect to the central axis of the abutment tooth.
The free end denture is attached to the abutment tooth and occluded, and the denture base is pressed against the gingiva by receiving the occlusal force, and the denture receives the occlusal force, so that the protruding portion is the grooved magnetic material. By moving along the groove of the denture, the denture itself sinks into the gingiva, so that the denture receives a reaction force from the gingiva.
A denture and its attachment attachment, characterized in that the denture wearer can perform an occlusal motion by balancing the repulsive force with the occlusal force as a force that opposes the occlusal force. The denture and its attachment attachment according to claim 1, wherein an implant is used as the abutment tooth instead of a natural tooth, and the metal crown is attached to the implant. A metal crown having a protrusion, which is used for the denture according to claim 1 or 2, and an attachment thereof. A free-end denture according to claim 1 or 2, characterized in that it is used in the denture and its attachment.

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