JP2000287998A - Device for tooth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount stably without a gap, improve a sense of use and usability, and reduce stimulation to the vicinity by forming an engagement portion of a rubber elastic body engaged and locked in an undercut or under zone of a tooth or the gum. SOLUTION: The entire dental base 2 is formed of an adding type silicone rubber, and a denture 3 is planted in the upper portion of the supporting portion 2a. The underside is formed into a shape that contacts the dental neck. Wall portions contacting closely the opposing faces of adjacent remaining teeth 4 are provided on maintenance portions 2b. The wall portions have swelling portions leading to the undercuts 4b from survey lines 4a below them, and are made to contact closely the faces of the undercuts 4b, thereby preventing a dead space from occurring, and gaps 4 between the wall portions and the remaining teeth 4 from occurring. The device can be put with a good sense of stability and use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a denture device such as a denture (local denture and full denture) or a jaw / oral protection device such as a night guard, a bite plane, and a mouthpiece. The present invention relates to a tooth device capable of improving inconsistency in mounting and difficulty in attaching and detaching, and effectively applying and protecting remaining teeth, mucous membranes and the like.

[0002]

2. Description of the Related Art At present, dentures due to loss of teeth (covered dentures)
The number of people who use is increasing, but dissatisfied with dentures, such as inappropriate dentures, painful and not chewable, coming off when opening the mouth, easy entry between dentures and gums, painful inability to insert Often, it interferes with comfortable eating habits.

[0003] The maintenance and stabilization of dentures, that is, dentures, is based on the fact that in full dentures (full dentures, full dentures), mucosal tissue called gums is maintained and stabilized by adsorption to dentures, and the compatibility with the gums is emphasized. . The bite force pressure when eating is a structure that bears on the mucosal surface. On the other hand, in partial dentures (local dentures, partial dentures), the remaining teeth are maintained and stabilized with a clasp of a maintenance device called a metal spring, and the burden pressure of occlusal force when eating is
Most of them have a structure with the remaining teeth and share the mucosal surface.

[0004] Due to the loss of teeth, the remaining tissue continues to be damaged to some extent. The maintenance and stability of dentures in full dentures requires that the burden pressure on the denture be applied to the mucous membrane as a function of the living body is improved by improving the compatibility of the denture. Underzones, such as bumps, cannot be accommodated with hard flooring materials. In addition, some patients complain of pain at the lower jaw after the alveolar bone is absorbed and the hard floor material touches the floor. In other words, acrylic resin and metal are used as the floor material in the dentures. However, since these materials are hard, they stimulate the chin mucous membrane of the denture base tissue, and the mucous membrane and alveolar bone are absorbed, causing pain. Etc., resulting in a denture incompatibility.

In partial dentures, if the burden pressure applied to the remaining teeth is excessive, the remaining teeth are tightened, twisted, or pressed down, thereby destroying periodontal tissues such as periodontal ligaments and supporting bones, resulting in pain and sway. This may cause a situation where the remaining teeth must be extracted. On the other hand, if the maintenance force is insufficient, the denture will be detached and shaken, and will not function as a denture.

Conventionally, as shown in FIGS. 9 and 10, such a partial denture (local denture) 31 has a denture base 32 in which a base of an artificial tooth 33 is embedded and fixed, and a maintenance device is attached. Are often used and are maintained at the remaining teeth 35 by the maintenance device. A clasp 34 is widely used in such a maintenance device. As shown in FIG. 12, the clasp 34 includes a connecting portion 34a, a supporting portion 34b, a grip portion 34c, and a maintaining portion 34d.
(Or hooks, rests, arms, and cusps). The connecting portion 34a connects the denture base 32 and the clasp 34, and serves to transmit the burden pressure applied to the denture base 32 during mastication to the remaining teeth 35, and is embedded in the denture base 32, brazed, It is an integrated hook body. In addition, the support portion 34b is connected to the connecting portion 34a, and is located on the occlusal surface of the remaining tooth 35. The support portion 34b serves as a resistance to the vertical pressure during mastication and serves to prevent the denture from sinking. It is the hook body centered. The grip portion 34c extends from both sides of the support portion 34b so as to surround the upper side of the remaining tooth 35, and is located on the buccolingual side from the occlusal surface of the remaining tooth 35 to the survey line 36, and is positioned horizontally during mastication. It is a hook arm that does not enter the undercut portion 37 of the remaining tooth surface, which serves as resistance to pressure and prevents the denture from moving sideways. Furthermore,
The retaining portion 34d is located on the undercut portion 37 below the buccolingual survey line 36 of the remaining teeth 35, which is a portion on the front side of the grip portion 34c, and prevents movement and detachment in the occlusal surface direction during mastication. It is a portion of the hook point that serves as a resistance and serves as a fixation that the denture does not come off, and enters the undercut portion 37 of the hook arm.

In this case, the maintenance force of the original function of the clasp depends on the amount of the undercut portion of the remaining teeth, the length, thickness, width, taper degree, cross-sectional shape, shape of the hook arm, and shape of the clasp material. Although determined by mechanical properties and the like, these components, when subjected to excessive burden pressure, stimulate the periodontal tissue of the remaining teeth, resulting in trauma.

[0008] Here, the retaining force of the clasp is divided into two types depending on the form of the remaining teeth. One type is a type that enters the undercut portion from the occlusal surface across the survey line, including an acres hook (FIG. 13A), a ring hook, a twin hook, and a hairpin clasp (FIG. 13B )), Back action hook, half and half hook, etc. The other types enter the undercut from the gingival side, and include PRI scrapes, roach hooks [T type (FIG. 13 (C)), L type (FIG. 13 (D)), and I type.
Type (FIG. 13E)].

[0009] However, partial dentures using the above-mentioned clasp-maintaining device impede the flow of food and saliva around the clasp, stagnating food residues, causing plaque to adhere to the remaining teeth, and increasing plaque. Cause lesions in the periodontal tissue, creating a tendency to destroy the remaining teeth and periodontal tissue.

In particular, in the case of a conventional partial denture,
The denture attaching / detaching direction forms a gap between the remaining tooth and the denture base. That is, as described above, the acrylic resin is widely used for the denture base of the conventional partial denture, but since the acrylic resin is hard, its lateral spread is the highest ridge of the adjacent remaining teeth. It is not possible to advance to the remaining tooth side beyond the survey line, and as shown in FIG.
5, the width W is limited by the survey line 36, so that a gap is formed between the denture base and the undercut portion 37 of the remaining tooth which becomes narrower toward the lower gum than the survey line 36, and this forms a large under pocket with the clasp. It becomes a stagnant space for food residue. This gap is called a dead space 38 and is present below the survey line 36 on the buccal and lingual surface adjacent to the remaining tooth 35, causing plaque to adhere easily and destroying the periodontal tissue of the remaining tooth. However, conventional partial dentures were abandoned as unavoidable.

Further, a conventional clasp used for partial dentures is formed of metal, and includes a wire clasp (wire hook) using an alloy processing material and a cast clasp (cast hook) made by casting an alloy. ). In terms of fitting accuracy and close contact with the tooth surface, it is said that cast clasps have higher precision and less foreign-body sensation than wire clasps that require difficult bending work. However, there are casting defects (eg, overheating, shrinkage cavities) during casting, and metal accuracy may be impaired. In addition, there is a course of manufacturing on this model and multiple models, and it requires complicated and sophisticated techniques, and is a complicated precision work. For this reason,
The production of dentures was troublesome and required a high degree of skill.

In recent years, an increasing number of patients are allergic to denture materials. It is considered to be pathogenic substances produced by bacteria growing in the resin bed and toxic metal ions released from alloy components. Alloy components with well-known toxicity include nickel, beryllium, cobalt, cadmium,
Copper, palladium and the like. Since these toxic components are components such as floors, clasps, brazing, and electroplating, it is considered that they affect biocompatibility.

As described above, the device for maintaining a denture currently used continuously stimulates the remaining teeth, periodontal tissue and the mucosal surface under the denture base, and particularly stimulates the remaining teeth and periodontal tissue. And overworking it is of great concern to destroy it.

For this reason, a denture structure that minimizes the burden on the remaining teeth, periodontal tissue, and the mucosal surface of the denture base is desired. In this case, it is desired that the denture structure does not require a condition for producing a prosthesis as a pretreatment for a remaining tooth as in an attachment. In other words, attachment dentures that perform prosthetic treatment on the remaining teeth, attach a maintenance device having a rutted structure to the prosthetic crown and the denture base side, disperse the burden pressure, and have good esthetics have been conventionally known. However, sacrificing healthy remaining teeth for that is not considered good.

The situation during this period is the same for full dentures (all dentures). As described above, conventional dentures also exert an excessive load on the mucous membrane under the denture base. Furthermore, in dentures, since the denture base is made of a hard acrylic resin, it cannot enter the under zone of the gingival mucosal surface, and it is difficult to perform stable wearing. Therefore, there is a need for a full denture that can be stably mounted on the gingival part without using a denture stabilizer.

Conventionally, a silicone-based paste has been used as a soft lining material. Lining is a replacement method (rebase) or floor lining (relining) by supplementing or updating the entire or part of the denture base for abnormalities caused by incompatibility of the denture base with the mucosal surface. It is supposed to eliminate the incompatibility of the denture. This is used instead of the cushioning material on the mucosal surface, but as mentioned above,
Since the denture base does not enter the underzone portion of the mucosal surface, even if a lining material is used, stable installation of the denture is essentially not obtained.

On the other hand, conventionally, jaw and mouth protection devices such as night guards, bite planes, mouthpieces and the like used for bruxism, malocclusion, incorrect tooth alignment, conservative treatment for temporomandibular disorders, etc. However, this type of conventional jaw / oral protection device cannot cover the undercut portion of the tooth, and is difficult to maintain. , And there are problems with elasticity and durability,
At present, it cannot be said that the original function is exhibited.

The structure of a jaw / oral protection device such as a night guard, a bite plane, and a mouthpiece using such a soft resin also causes plaque adhesion similar to the partial dentures described above, and an increase in plaque is caused by the increase in teeth. It causes lesions in the surrounding tissue and results in resorption of the alveolar bone of the remaining teeth. In these patients with occlusal abnormalities, many missing teeth and isolated teeth cannot cover the undercut portion, the occlusal support area is lost, and occlusal collapse occurs, making treatment difficult. A similar under-pocket (dead space) also exists in the correction device.

[0019]

SUMMARY OF THE INVENTION The present invention has been made in order to improve the above circumstances, and has a denture having a denture, that is, a local denture and a full denture, and a jaw such as a night guard, a bite plane, and a mouthpiece.・ Tooth devices such as mouth protection devices can be stably mounted without gaps such as dead spaces, have excellent usability in attaching and detaching, etc., have good usability, and have residual teeth and periodontal tissue It is another object of the present invention to provide a tooth device in which stimulation to a mounting site such as a denture base mucous membrane and the vicinity thereof is reduced.

[0020]

The present invention provides the following tooth device in order to achieve the above object. Claim 1: A tooth device having an engaging portion made of a rubber elastic body engaged with and engaged with an undercut portion or an underzone portion of a tooth or a gum. In another preferred embodiment, the tooth device is a denture having a denture base and an artificial tooth implanted therein, wherein the denture base has a rubber elastic body portion having the engaging portion and a rubber elastic body portion. The tooth device according to claim 1, further comprising a reinforcing material portion embedded in the tooth. In another preferred embodiment, the tooth device is a denture having a denture base and an artificial tooth implanted therein, wherein the denture base has a rubber elastic part having the engaging portion, and a rubber elastic part having the engaging part. The tooth device according to claim 1, further comprising a reinforcing member laminated on the upper surface. In a preferred embodiment, the tooth device is a denture having a denture base and artificial teeth implanted therein, and the denture base is made of a rubber elastic part having the engaging portion. Equipment. Claim 5: The artificial teeth are made of a rubber elastic body.
The tooth device according to any one of the preceding claims. In another embodiment, the denture is a local denture, and the elastic rubber portion of the denture base is provided on the buccolingual tooth surface side of the artificial tooth and is in close contact with the gingiva, and as the engaging portion. A maintenance portion that is in close contact with at least the surface from the survey line to the undercut portion of the opposing tooth surface of the adjacent remaining tooth; and a buccolingual tooth surface of the remaining tooth that extends from both sides of the maintenance portion to the remaining tooth side. The tooth device according to any one of claims 2 to 5, further comprising: a gripping portion that is in close contact with at least an undercut portion surface below the survey line. [7] The tooth according to any one of [2] to [5], wherein the dentures are all dentures, and the rubber elastic body portion of the denture base has an engaging portion which engages with the gingival underzone portion. Equipment. Claim 8: The tooth device is a jaw / oral protection device having a tooth covering protection portion such as a night guard, a bite plane, and a mouthpiece, and a connection portion connected to both lower edges thereof. The tooth device according to claim 1, wherein the continuous portion is formed of a rubber elastic body, and an engaging portion is formed in the continuous portion. Claim 9: The rubber elastic body is silicone rubber.
The tooth device according to any one of claims 1 to 8. [10] The tooth device according to [9], wherein the silicone rubber is a silicone rubber obtained by curing an addition reaction-curable silicone rubber composition. Claim 11: JIS-A hardness of the rubber elastic body is 10 to 80.
The tooth device according to any one of claims 1 to 10, wherein

To achieve the above object, the inventor of the present invention has a structure which can be easily manufactured without complicated processing, has good biocompatibility, has residual teeth, periodontal tissue, and gingival mucosa under a denture base. As a result of intensive studies on a tooth device that does not give an excessive load to the surface, etc., as described above, it is obtained by curing a rubber elastic body, particularly a silicone rubber, especially an addition reaction-curable silicone rubber composition. By using silicone rubber (hereinafter simply referred to as an addition type silicone rubber), it adheres to the remaining teeth and gingival mucosa, and enters the undercut portion below the surviving line of the remaining teeth or the underzone portion such as flava gum and bone ridge. Even if the engaging portion is formed as described above, it can be easily attached and detached and firmly locked to the undercut portion or the underzone portion, and the remaining teeth, periodontal Weave, in which the knowledge that this is what it is less likely to give a burden to the mucosal tissue.

More specifically, the tooth device of the present invention comprises:
It is preferably used for dentures with dentures, that is, partial dentures (local dentures) and full dentures (all dentures). In partial dentures, a rubber elastic body, particularly silicone rubber, is used. In any of the embodiments 2 to 5, as in claim 7, a denture base structure that is in close contact with the remaining teeth and the gingiva can be obtained, and the undercut of the remaining teeth is impossible with a conventional acrylic resin or metal. The denture base can be provided with a supporting structure that is also in close contact with the denture, eliminating the dead space that had been a problem in the past, eliminating gaps between the denture and the remaining teeth, and eliminating stagnation of food residue In addition, a rubber elastic body such as silicone rubber can be formed in a structure in which the remaining teeth are gripped by closely adhering to the undercut portions of the buccolingual flank surfaces of the remaining teeth. Solid support At the same time, the remaining teeth support the denture in a state where almost half of the entire circumference of the tooth surface is in close contact with a rubber elastic body such as silicone rubber. Therefore, the conventional denture which locally supports the denture only by the hook point of the clasp Unlike the structure, the burden on the remaining teeth is very small, and the burden on the periodontal tissue of the remaining teeth is also small. Moreover, even if the denture base portion has an extended structure that has advanced to a thin undercut portion that is recessed below the survey line, which is the highest line of the peripheral surface of the remaining teeth, this portion is made of silicone rubber or the like. Since it is formed of a rubber elastic body, it can be easily elastically deformed and easily attached and detached when the partial denture is attached and detached, and is excellent in usability. Further, the lower surface of the denture base is in close contact with the gingival mucosal surface, and a gap is hardly formed between the denture base and the gingiva, so that food residue and the like do not enter between the denture base and the gingiva. Is supported in close contact with the gingiva, thereby reducing the burden on the mucous membrane under the denture base.

Further, since it is not necessary to use a metal clasp, the clasp does not obstruct the flow of saliva, food residue, and the like, and there is no possibility that biocompatibility such as metal allergy is impaired.

[0024] Also in the full denture (all dentures) according to the seventh aspect, the full-closed portion of the gingival mucosal surface is in close contact with the entire attachment portion, and the engaging portion of the rubber elastic material such as silicone rubber is made of flavo gum.
It bulges out into the under zone, such as the bone ridge, and is firmly supported by the gums, reducing the burden on the denture submucosa,
It is easy to put on and take off.

Therefore, the denture with a denture according to the present invention can improve the inconsistency of the conventional denture at the time of wearing and the difficulty at the time of putting on and taking off the denture patient, reduce the pain of the denture patient,
It provides a new maintenance structure that protects the remaining teeth, mucosal surfaces, etc.

Also, the present invention is effective as a chin / mouth protection device for night guards, bite planes, mouthpieces, etc., and a rubber elastic material such as silicone rubber formed on a continuous portion thereof. It is firmly supported by the undercut part of the teeth or the underzone part of the gingiva at the engagement part by the body, so that the teeth can be reliably protected, and especially the tooth covering protection part is continuously connected by an elastic body such as silicone rubber. By forming it integrally with the part, it adheres to the tooth and provides more reliable protection.

As described above, the tooth device of the present invention has a maintenance structure that solves the problems of the conventional device of this type, and alleviates the pressure against the pressure such as the mastication pressure. It is a structure that gives excellent reproducibility of elasticity that absorbs and repels resistance and low contraction, and gives a structure that adheres to the remaining teeth, periodontal tissue, mucosal surface under the denture base,
In particular, in a denture, the lost function can be reproduced, the elasticity of the absorbed mucosal surface can be reproduced, and the replacement of the lost periodontal ligament can be reproduced. The high degree of reproducibility of the rubber elastic body makes it adhere to and adhere to uneven tooth surfaces and mucous membrane surfaces, and its elastic force transmits the burden pressure to the remaining teeth and mucous membrane surface by the repulsive force of the burden pressure. It is a structure that protects without any.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS. Figure 1
2 shows a partial denture (local denture) according to one embodiment of the present invention.
And artificial teeth 3 implanted in the denture base 2.

The denture base 2 includes a support portion 2a and a maintenance portion 2
b, and a grip portion 2c. In this example, the entire denture base 2 is formed of an additional type silicone rubber. The support portion 2a has an artificial tooth 3 implanted on the upper portion and a lower surface formed in a shape that is in close contact with the gum corresponding to the gum to be mounted. The retaining portion 2b corresponds to the surface facing the adjacent remaining tooth 4 and has a wall portion that is in close contact with the remaining tooth 4. The bulging portion bulging from the survey line 4a of the remaining tooth 4 to the undercut portion 4b below it. Protruding part (engaging part)
2d, the bulging surface is in close contact with the undercut surface of the remaining tooth 4 so that no dead space exists and the remaining tooth 4
Is formed so that no gap is formed between The grip portion 2c is formed by extending (outwardly) in the direction of the remaining teeth 4 from both sides of the holding portion 2b, and the inner surface thereof corresponds to the buccolingual teeth surfaces of the remaining teeth 4. It has a swelling portion (engaging portion) 2d which swells to the undercut portion 4b and closely contacts the undercut portion surface. In this case, the extent to which the grip portion 2c extends to the remaining teeth 4 can be set to approximately half the width of the buccolingual tooth surface of the remaining teeth 4, and the undercut below the lingual survey line 4a of the remaining teeth 4 can be made. The portion 4b and the undercut portion 4b on the surface facing the denture of the remaining tooth 4 are appropriately selected in consideration of aesthetics and the degree of engagement of the bulging portion 2d with the undercut portion 4b.

Here, the supporting portion 2a is in close contact with the gingival mucosal surface and resists settlement of the denture due to its elasticity over a wide range. The support portion 2a extends to the underzone portion below the gingival bone protrusion to form a swelling portion (engaging portion) that swells toward the underzone portion, and engages with the bone protrusion portion, if necessary. It can also be configured to stop. Further, as shown in FIG. 3A, the holding portion 2b has a bulging portion 2b.
d engages the adjacent undercut portion 4b of the remaining tooth 4,
The dentures come into close contact with each other, and the elasticity of the dentures resists detachment. Further, as shown in FIG.
Engages with the undercut portion 4b on the buccolingual tooth surface of the remaining tooth 4,
The dentures also adhere, and in this respect also resist denture removal and their elasticity resists lateral movement of the denture.

Examples of the addition type silicone rubber forming the denture base 2 include a known addition reaction-curable silicone rubber composition, that is, an organopolysiloxane having two or more alkenyl groups such as vinyl groups in a molecule, and a silicon atom. Essential components are an organohydrogenpolysiloxane having at least two hydrogen atoms (SiH groups) in the molecule, and an addition reaction catalyst such as a platinum-based catalyst, and if necessary, silica and other fillers and gum color. What cured the thing mix | blended the pigment | dye etc. for coloring into a used. The silicone rubber composition is preferably a liquid in terms of moldability and the like, but is not limited thereto. As the silicone rubber composition, a commercially available product can be used. For example, an addition type product manufactured by Shin-Etsu Chemical Co., Ltd. can be used.

The addition type silicone rubber has excellent curability of the composition, good handleability, excellent biocompatibility, moderate elasticity and elastic restoring force, and high strength. It is also a material that is excellent in reproducibility of impression form and is most suitable for forming the above-mentioned denture base. It is the best thing to accomplish. However, other curable type, for example, condensation type silicone rubber can be suitably used, and a rubber elastic material having good biocompatibility can be effectively used.

The hardness of the rubber elastic material such as the above-mentioned addition type silicone rubber is appropriately selected and is not necessarily limited, but is usually 10 to 80 in JIS-A hardness, especially 20 in JIS-A hardness.
~ 80 are used. In this case, the strength of the denture can be increased or decreased depending on the hardness of the rubber elastic body.

The denture base made of a rubber elastic material such as silicone rubber may be formed of a single rubber material. However, if necessary, the denture base may be formed by combining rubber materials such as additional silicone rubber having different hardness. can do. For example, when mucosal absorption is large, as shown in FIG. 4, the configuration of the support portion 2a is changed to the base portion 2a on which the artificial tooth 3 is implanted.
1 can be made of a relatively hard rubber material, and a gingival mucosa adhesion portion 2a-2 made of a soft rubber material can be formed below the base 2a-1. Alternatively, it is possible to adopt a configuration in which the retaining portion 2b is laminated on the relatively hard base portion 2a-1 as described above. In this case, the base 2a-1 and the gingival mucosa adhesion portion 2a-2
Is preferably formed of silicone rubber such as addition-type silicone rubber. However, the base 2a-1 may be formed of another rubber material, and the gingival mucosal adhesion portion 2a-2 may be formed of silicone rubber. it can.

FIGS. 5A, 5B, 6A,
(B) shows another embodiment of the partial denture 1 and is shown in FIG.
Fig. 6 shows a structure in which a reinforcing member 5 made of a hard resin such as an acrylic resin or a metal material is embedded in a rubber elastic body to form a support portion 2a. Of the reinforcing member 5 made of
a is formed and is configured in the same manner as in FIG. 4, and the denture is reinforced by the reinforcing material 5. In this case, as shown, an artificial tooth can be implanted in the reinforcing member 5.

As described above, the partial dentures can be in various forms. In the present invention, the supporting portion has a gingival mucosa tight contact portion, a retaining portion, and a grip portion which are made of silicone such as an additional silicone rubber. It is preferable to form with rubber.

According to the above-mentioned partial denture, the bulge made of a rubber elastic material such as silicone rubber is brought into close contact with the interdental space generated by the conventional denture attaching / detaching direction and the undercut portion below the survey line on the cheek tongue surface. Since the elastic force is a maintenance force, the denture is stuck to the remaining tooth surface and mucous membrane surface without any tightening or twisting of the remaining teeth, stabilizing the denture, and having a form without the feeling of foreign substances. The stagnant food residue is eliminated, a smooth flow of food is created, and the remaining teeth and periodontal tissue can be protected.

Further, as described above, by selecting the elastic force or hardness of the rubber material, it is possible to engage with and grasp any shape of the undercut portion of the remaining tooth, and to ensure that the undercut portion of the remaining tooth resists the burden pressure. In this case, the impression form reproducibility of the rubber material, especially the silicone rubber such as the addition type silicone rubber, creates a form without dimensional change,
It provides high-precision adaptation to the remaining tooth surface and mucosal surface, and has excellent maintenance and stability.

FIGS. 7 (A) and 7 (B) show an example of a denture 11 (all dentures). The dentures 11 are a denture base 12 and an artificial tooth 13 implanted on the denture base 12. The denture base 12 is composed of a base 12a attached to the gum and closely attached to the gum, and a hanging portion 12b connected to the lower edges of both sides of the base 12a and closely attached to the gum,
On the inner surface of the hanging portion 12b, there is a mucous flavogum 14
Alternatively, a bulging portion (engaging portion) 12c that bulges into and engages with and adheres to an under zone portion below the bone ridge 15 is formed. In this example, the entire denture base 12 is formed. It is formed of an addition type silicone rubber.

Therefore, even in this denture 11, the base 12a is in close contact with the gingival mucosal surface, resists the denture subsidence by the elastic force of the silicone rubber, reduces the load on the mucous membrane, and reduces the burden on the mucous membrane. The engaging portion 12c engages and adheres to the under-zone portion to resist detachment of the denture, enables maintenance and stabilization of the denture, and is the same as that described in the above-mentioned partial denture. To give the effect. The rubber material forming the denture base may be another silicone rubber or another rubber elastic body. In addition, the denture base may be formed of a rubber material having a different hardness, and the use of a reinforcing material may be partially dentured. Is the same as
The hanging portion 12b is preferably formed of silicone rubber such as an addition type silicone rubber.

In the present invention, artificial teeth can be formed from a relatively hard rubber elastic material such as silicone rubber, thereby obtaining a denture with a more integrated artificial tooth and denture base. Can be.

FIGS. 8A and 8B show a chin / mouth protection device 21 such as a night guard, a bite plane, and a mouthpiece.
This has a tooth covering protection portion 22 that is in close contact with the teeth and covers and protects the teeth, and a continuous portion 23 that is respectively connected to the lower edges of both sides thereof and is in close contact with the gingival mucosal surface. On the inner surface of the continuous portion 23, a bulging portion (engaging portion) 23a that bulges into an undercut portion of the tooth (natural tooth) 24, and closely contacts and engages with the undercut portion is formed. In this example, the whole is formed of an addition type silicone rubber.
In this device, similarly to the case of the full denture, the bulging portion 23a of the continuous portion 23 is closely attached to and engaged with the undercut portion to prevent disengagement, thereby maintaining stable and maintaining the protection portion 22.
Closely adheres to the teeth, and the elasticity of the teeth securely protects the teeth from external forces.

The bulging portion (engaging portion) may be formed so as to be in close contact with and engage with an underzone portion below the gingival bone ridge depending on the form of the protective device. Further, the whole may be formed of silicone rubber, the above-mentioned protection portion may be formed of another elastic material, and only the continuous portion may be formed of silicone rubber, or the protection portion may be formed of a rubber material having a different elastic force or hardness. It is optional to make the same change as in the above case, such as forming. In this case, the chin / oral protection device can have various functions by freely changing the elastic force or the hardness, and has a wide range of application. For example, it is possible to correct using the elastic force of silicone rubber instead of the trajectory of the orthodontic device, set the movement of the teeth on the model, and cover the teeth in the form of a night guard, so that the feeling of foreign substances can also be reduced In addition, an orthodontic device that can move teeth without difficulty can be obtained.

[0044]

The tooth device of the present invention does not impose a burden on the remaining teeth, periodontal tissue, etc., and is maintained in close contact with the tooth surface and the mucosal surface.
It is stable, easy to put on and take off, has no stagnation of food residue, has a form that does not have a foreign body feeling, is highly safe for living bodies, and is made of hard floor material, metal spring (clasp) etc. Since the hard resin and the metal material do not directly contact the teeth and the gingival surface, the adverse effects of these materials are improved. In particular, in the case of partial dentures, the dead space and the interdental space are eliminated, and the conventional problems can be improved at once.

Also, in manufacturing, difficult bending work
Casting work, design of the direction of attachment and detachment, setting of each clasp, deletion of healthy teeth to equip expensive attachments and prosthesis without burdening, pressure-contact and suction of sheet-like soft resin and resin by expensive equipment It can be manufactured by inexpensive and simple polymerization work in all steps without molding.

[Brief description of the drawings]

FIG. 1 shows a partial denture according to one embodiment of the present invention;
(A) is a sectional view, and (B) is a plan view.

FIGS. 2A and 2B show a state where the partial denture is mounted between remaining teeth, wherein FIG. 2A is a front view and FIG. 2B is a plan view.

3A and 3B are schematic diagrams illustrating a state of close contact with an adjacent remaining tooth when the partial denture according to the present invention is mounted, and FIG. 3A illustrates a bulging portion of a maintenance portion closely contacting an undercut portion of the remaining tooth. The aspect (B) shows an aspect in which the bulging portion of the grip portion is in close contact with the undercut portion of the remaining tooth.

FIG. 4 is a sectional view of a partial denture according to another embodiment of the present invention.

FIG. 5 shows a partial denture according to another embodiment of the present invention, wherein (A) is a front view and (B) is a cross-sectional view.

FIG. 6 shows a partial denture according to still another embodiment of the present invention, wherein (A) is a front view and (B) is a sectional view.

FIGS. 7A and 7B are sectional views of dentures according to an embodiment of the present invention.

FIGS. 8A and 8B show a chin / oral protection device according to an embodiment of the present invention, wherein FIG. 8A is a cross-sectional view and FIG.

FIG. 9 is a front view of a state in which a conventional partial denture is mounted between remaining teeth.

FIG. 10 is a plan view showing a state in which a conventional partial denture is mounted between remaining teeth.

FIG. 11 is a front view illustrating a state in which a conventional partial denture is mounted between the remaining teeth.

FIG. 12 shows a clasp used to support a conventional partial denture on a remaining tooth, wherein (A) is a partially omitted front view,
(B) is a partially omitted plan view.

FIGS. 13A to 13E are explanatory diagrams each showing a conventional clasp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Partial denture (local denture) 2 Denture base 2a Support part 2b Maintenance part 2c Grip part 2d Swelling part (engagement part) 3 Artificial tooth 4 Remaining tooth 4a Survey line 4b Undercut part 5 Reinforcement material 11 Total denture (all floors) 12 denture base 12a base 12b hanging part 12c bulging part (engaging part) 13 artificial tooth 14 flavogum 15 bone ridge 21 jaw / mouth protection device 22 tooth covering protecting part 23 connecting part 23a bulging part (engaging part) ) 24 teeth

Claims (11)

[Claims] 1. A tooth device having an engaging portion made of a rubber elastic body engaged with and engaged with an undercut portion or an underzone portion of a tooth or a gingiva. 2. A denture device comprising a denture base having a denture base and artificial teeth implanted therein, wherein the denture base has a rubber elastic body part having the engaging portion, and a rubber elastic body part. The tooth device according to claim 1, further comprising a reinforcing member embedded in the tooth. 3. A denture base comprising a denture base having a denture base and artificial teeth implanted therein, wherein the denture base has a rubber elastic body part having the engaging portion, and a rubber elastic body part. The tooth device according to claim 1, further comprising a reinforcing member laminated on the upper surface of the tooth. 4. The dental device according to claim 1, wherein the dental device is a denture having a denture base and artificial teeth implanted therein, and the denture base is made of a rubber elastic part having the engaging portion. Equipment for teeth. 5. The tooth device according to claim 2, wherein the artificial tooth is made of a rubber elastic body. 6. A denture having a local denture, wherein a rubber elastic portion of the denture base is located on the buccolingual tooth surface side of the artificial tooth and is in close contact with the gingiva, and an engaging portion. A maintenance portion that is in close contact with at least the surface from the survey line to the undercut portion of the opposing tooth surface of the adjacent remaining tooth; and a buccolingual tooth of the remaining tooth that extends from both sides of the maintenance portion to the remaining tooth side, respectively. The tooth device according to any one of claims 2 to 5, further comprising a gripping portion that is in close contact with at least the undercut portion surface below the survey line. 7. The denture according to claim 2, wherein the dentures are all dentures, and the rubber elastic portion of the denture base has an engaging portion that engages with the gingival underzone portion. Equipment for teeth. 8. The tooth device is a jaw / oral protection device having a tooth covering protection portion such as a night guard, a bite plane, and a mouthpiece, and a connection portion connected to both lower edges thereof. The tooth device according to claim 1, wherein the continuous portion is formed of a rubber elastic body, and an engaging portion is formed in the continuous portion. 9. The tooth device according to claim 1, wherein the rubber elastic body is silicone rubber. 10. The tooth device according to claim 9, wherein the silicone rubber is a silicone rubber obtained by curing an addition reaction-curable silicone rubber composition. 11. The rubber elastic body has a JIS-A hardness of 10 to 10.
The tooth device according to any one of claims 1 to 10, which is 80.