JP2015134051A - Denture and denture unit using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a denture in which a stress generated between a dental implant and a denture in engagement can effectively be relaxed to prevent the damage of the denture, and thereby the durability can effectively be improved and the replacement of a fitting part can easily be performed, and to provide a denture unit using the same denture.SOLUTION: An attachment-type denture 1 includes an artificial tooth base 2 coming into abutment with the inside of an oral cavity, and an artificial tooth 3 implanted on the artificial tooth base 2. The attachment-type denture is used by fitting a fitting part 20 provided in the artificial tooth base 2 into a counterpart fitting part 50 provided in the oral cavity. A stress relaxing member 22 for relaxing the stress generated between the counterpart fitting part 50 and the denture 1 in the fitting part 20 provided on the artificial tooth base 2.

Description

  The present invention relates to an attachment-type denture used by fitting to a fitting portion provided in the oral cavity and a denture unit using the denture.

  Conventionally, dentures (dentures), which are a type of prosthetic device, have been used for patients who have lost some or all of their natural teeth. In recent years, for such a denture, for convenience, an artificial tooth base that comes into contact with the oral cavity and an artificial tooth that is implanted in the artificial tooth base are provided. A so-called attachment-type denture that is used by fitting to a fitting portion to be provided is actively used. Moreover, as an attachment type denture, what is detachably attached to the oral cavity by fitting a concave portion provided for the denture to a convex artificial tooth root provided in the oral cavity is generally used. Furthermore, since attachment and detachment operations are easy, attachment-type dentures using the attractive force of permanent magnets are also widely used.

  As prior arts showing such conventional attachment dentures, there are Patent Documents 1 and 2 below.

Japanese Patent Laid-Open No. 2001-170081 JP 2000-254151 A

  Conventional attachment dentures as shown in Patent Documents 1 and 2 have the advantage of being easy to attach and detach.

  However, in such a conventional attachment-type denture, the stress generated between the artificial root and the denture during meshing is applied to the artificial tooth implanted at a position corresponding to the artificial root (directly above the artificial root). Since the load is applied locally, the artificial tooth is liable to be damaged such as cracks. Such inconvenience was more noticeable when eating hard food.

  Therefore, the present invention solves the above-mentioned conventional inconveniences and can effectively relieve stress generated between the artificial root and the denture at the time of meshing, thereby preventing the denture from being damaged, thereby effectively improving the durability. It is another object of the present invention to provide a denture that can be easily replaced, and a denture unit that uses the denture.

  In order to solve the above-mentioned problems, the denture of the present invention comprises an artificial tooth base that comes into contact with the oral cavity and an artificial tooth that is implanted in the artificial tooth base, and a fitting portion provided on the artificial tooth base is provided in the oral cavity. An attachment-type denture that is used by being fitted to a mating mating portion provided on the artificial tooth base, wherein the stress mitigating member relieves stress generated between the mating mating portion and the denture on the mating portion provided on the artificial tooth base The first feature is to have

  In the case of the denture according to the first feature, by providing a stress relaxation member in the fitting portion provided in the artificial tooth base, the stress generated between the mating fitting portion provided in the oral cavity and the denture at the time of meshing effectively Can be relaxed. Therefore, the denture can be prevented from being damaged, and the durability of the denture can be effectively improved.

  In the denture according to the present invention, in addition to the first feature, the fitting portion is formed by a concave portion corresponding to the convex portion of the counterpart fitting portion and a stress relaxation member provided on the inner surface of the concave portion. This is the second feature.

  In the case of a denture according to the second feature, in addition to the operational effect of the first feature, it is possible to facilitate the fitting of the counterpart fitting portion provided in the oral cavity with the denture, can do.

  In the denture according to the present invention, in addition to the first feature, the fitting portion includes a concave portion corresponding to the convex portion of the counterpart fitting portion, a first housing member detachably attached to the concave portion, The third feature is that it is formed of a stress relieving member provided on the inner surface of one housing member.

  In the case of the denture according to the third feature, in addition to the effects described in the first feature, a detachable fitting portion can be formed by the first housing member and the stress relaxation member. Therefore, the replacement of only the fitting portion can be easily performed, the durability of the denture can be further improved, and the easy-to-handle denture can be obtained.

  In addition to the third feature, the denture according to the present invention includes a second housing member that can be detachably attached to the first housing member between the recess and the first housing member. 4 features.

  In the case of the denture according to the fourth feature, in addition to the operational effects described in the third feature, damage to the artificial tooth base can be further prevented, and the denture can be further improved in durability.

  In addition to any one of the first to fourth features, the denture of the present invention has a fifth feature that the stress relaxation member is formed of a silicone resin.

  In the case of a denture according to the fifth feature, in addition to the operational effects described in any one of the first to fourth features, it is possible to provide a stress relaxation member that is excellent in elasticity and water resistance.

  A denture unit of the present invention is an attachment type denture unit comprising the denture according to any one of the second to fifth features and an artificial tooth root having a convex portion that fits into the concave portion of the denture. The sixth feature is that the convex portion is a Umi-shaped hemispherical body having a flat end on the side in contact with the inner surface of the concave portion.

  In this case, the height when the denture is mounted in the oral cavity in the fitting denture unit can be effectively suppressed.

According to the denture of the present invention, it is possible to effectively relieve stress generated between the fitting portion provided in the oral cavity and the denture at the time of meshing, thereby preventing damage to the denture, thereby effectively improving durability. Can be made. In addition, the fitting portion can be easily replaced.
Moreover, according to the denture unit of this invention, the height at the time of mounting | wearing a denture in an oral cavity in a fitting type denture unit can be suppressed effectively.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view which shows the denture based on the 1st Embodiment of this invention, (a) is a top view, (b) is a bottom view. It is a perspective view which shows the principal part in the oral cavity where the denture based on the 1st Embodiment of this invention is attached. It is sectional drawing which shows the principal part of the denture based on the 1st Embodiment of this invention, and a denture unit, (a) is a figure which shows the state before fitting an artificial tooth root and a denture, (b) is an artificial tooth root and a denture. It is a figure which shows the state after having fitted together. It is sectional drawing of the fitting part of the denture based on the 1st Embodiment of this invention. It is sectional drawing which shows the principal part of the denture based on the 2nd Embodiment of this invention, and a denture unit, (a) is a figure which shows the state before fitting an artificial tooth root and a denture, (b) is fitting of a denture. It is sectional drawing of a part. It is sectional drawing which shows the principal part of the denture based on the 3rd Embodiment of this invention, and a denture unit, (a) is a figure which shows the state before fitting an artificial tooth root and a denture, (b) is fitting of a denture. It is sectional drawing of a part. It is a figure which shows the principal part of the modification of the other party fitting part provided in the oral cavity which concerns on embodiment of this invention, (a) is a figure which shows the state before fitting an artificial tooth root and a denture, (b) is artificial. It is a figure which shows the state after fitting a tooth root and a denture. It is a figure which shows the modification of the other party fitting part provided in the oral cavity which concerns on embodiment of this invention, and the fitting part provided in an artificial tooth base, (a) is a figure which shows the modification of the other party fitting part provided in an oral cavity. (B) is a figure which shows the modification of the fitting part provided in an artificial tooth base. It is sectional drawing which shows the principal part of the conventional denture and a denture unit, (a) is a figure which shows the denture of the system which fits the other party fitting part provided in an oral cavity, and the fitting part provided in a denture, (b) is oral cavity It is a figure which shows the denture of the system which adhere | attaches the permanent magnet provided in an inside and the permanent magnet provided in a denture.

  Hereinafter, with reference to the drawings, a denture according to the first embodiment of the present invention and an attachment type denture unit using the denture will be described for the understanding of the present invention. However, the following description is an embodiment of the present invention, and does not limit the contents described in the claims.

  With reference to FIG. 1, the denture 1 which concerns on the 1st Embodiment of this invention is a denture used by mounting | wearing in the oral cavity of a lower jaw. More specifically, the denture is a denture used by fitting the fitting portion 20 provided in the denture 1 to the counterpart fitting portion 50 provided in the gingiva 5 shown in FIG. In addition, in the 1st Embodiment of this invention, while the other party fitting part 50 with which the gum 5 is provided is formed with a male type (convex shape), the fitting part 20 with which the denture 1 is provided is formed with a female type (concave shape). As a configuration. Of course, it is not restricted to such a structure, It is good also as a structure which forms the other party fitting part 50 with which the gum 5 is equipped with a female type, and forms the fitting part 20 with which the denture 1 is equipped with a male type.

  In the following description, “left and right” refers to an observer who has a denture in the lower oral cavity facing the wearer, and the right hand side of the observer is “right” and the left hand side is “left”. To do. In addition, “upper and lower” means that the head side of the person wearing the denture is “upper” and the foot side is “lower” as seen from the observer facing the wearer wearing the denture in the oral cavity on the lower jaw side Is.

  As shown in FIGS. 1 to 3, the denture 1 is composed of an artificial tooth base 2 that comes into contact with the gingiva 5 and an artificial tooth 3 implanted in the artificial tooth base 2.

  The artificial tooth base 2 is a member formed in a substantially arc shape along the shape of the gum 5. The artificial tooth base 2 covers the lower part of the gingiva 5, the upper base 2 a on which the artificial tooth 3 is implanted, the outer base 2 b that covers the outer side of the gingiva 5, and the inner base that covers the inner side of the gingival 5. 2c, and has a substantially semi-elliptical or concave cross section. As the material of the artificial tooth base 2, any material such as an acrylic resin that is usually used as an artificial tooth base may be used. However, it is desirable to use an acrylic resin.

  The artificial tooth 3 is implanted on the upper base 2 a of the artificial tooth base 2. In 1st Embodiment of this invention, it is set as the structure which forms all the teeth by the artificial tooth 3, assuming that there is no natural tooth in the gum 5 of the person wearing the denture 1. As the material of the artificial tooth 3, any material such as an acrylic resin, which is usually used as an artificial tooth, may be used.

  Moreover, in 1st Embodiment of this invention, it is set as the structure provided in the inner base 2c of the artificial tooth base 2 with the fitting part 20 which has a recessed part fitted by the other party fitting part 50 which has a convex part. More specifically, in the first embodiment of the present invention, as shown in FIG. 3, the concave groove 21 that fits the convex head 51 a provided in the artificial tooth root 51 and the inner surface of the concave groove 21 are provided. The fitting portion 20 is formed with the stress relaxation member 22. In the present embodiment, as shown in FIGS. 3 and 4, the stress relaxation member 22 is provided in such a configuration that a fitting space K having a bowl-shaped cross-sectional shape is formed on the inner surface of the concave groove 21. It is as. In other words, the stress relieving member 22 is provided in such a configuration that a fitting space K having a narrow cross-sectional shape in which the opening is narrow and wide toward the back is formed. Moreover, in this embodiment, it is set as the structure which forms the concave groove 21 in a rectangular shape. Of course, the shape of the concave groove 21 is not limited to that of the present embodiment, and can be changed as appropriate. In the present embodiment, a silicone resin is used as the stress relaxation member 22.

  Note that the depth D of the concave groove 21 shown in FIG. 4 needs to be a depth that can ensure a certain gap above the head 51a in a state where the head 51a is fitted in the concave groove 21. . The width E of the concave groove 21 needs to be long enough to secure a certain gap on the left and right of the head 51a in a state where the head 51a is fitted to the concave groove 21. Specifically, when the height F of the head 51a is about 2 mm and the width G is about 3 mm, the depth D of the concave groove 21 is about 2.5 mm to 3 mm, and the width E is about 4.5 mm to 5 mm. It is desirable to do. Moreover, in embodiment of this invention, although it was set as the structure which provides the fitting part 20 in two places, it does not necessarily restrict to this number, The number of fitting parts 20, a size, an arrangement position, etc. are equipped with a denture. It can be appropriately changed according to the missing state of the tooth of the person who performs.

  In addition, as a formation method of the fitting part 20, the process similar to the normal process which produces a denture provided with the concave fitting part fitted to a convex fitting part first (the process of creating an impression, an impression) The concave groove 21 is formed using a process of producing a model by pouring plaster, a process of producing a denture on the model, and the like. Thereafter, a silicone body having a fitting space K having a predetermined shape and size (same shape and size as the head 51a of the artificial tooth root 51), which is formed in advance using a silicone resin, is bonded to the concave groove 21. The stress relieving member 22 can be formed by fitting through, heating and pressurizing. Of course, the method of forming the fitting portion 20 is not limited to such a process, and a concave groove 21 having a predetermined shape and a predetermined size is formed at a position corresponding to the mating fitting portion 50 in the inner base 2c. Any process may be used as long as the stress relaxation member 22 having the fitting space K corresponding to the size of the head 51 a can be provided on the inner periphery of the concave groove 21.

  The gingiva 5 is a base on which a so-called denture 1 is mounted. Inside the gingiva 5, there are a tooth root 6 and an alveolar bone 7, as shown in FIG. Moreover, in the 1st Embodiment of this invention, as shown in FIG. 2, it is set as the structure which provides the other party fitting part 50 fitted with the fitting part 20 of the denture 1 in the predetermined location of the gum 5. As shown in FIG. 3, the mating fitting part 50 attaches an artificial tooth root 51 having a head 51 a to a recessed groove 6 a having a predetermined depth provided in the tooth root 6 through the gum 5 with the tooth root 6 as a base. It is formed by that. That is, the artificial tooth root 51 according to the first embodiment of the present invention is a so-called root face plate type artificial tooth root in which the tooth root remains. Note that the number, size, arrangement position, and the like of the counterpart fitting portion 50 can be appropriately changed depending on the missing state of the tooth of the person wearing the denture. Although not shown in detail, the surface in contact with the denture 1 in the gingiva 5 is formed in a convex cross section corresponding to the shape of the bottom surface of the denture 1 (substantially semi-elliptical or concave).

  In the first embodiment of the present invention, as shown in part in FIG. 3, the shape of the head 51 a forming the convex portion is the end on the side in contact with the inner surface of the concave groove 21 forming the concave portion. It is configured as a mitake-shaped hemisphere that is a plane H. Such a head 51a can be formed by subjecting a spherical head to a process such as polishing. Further, as the material of the artificial tooth root 51, any material such as a metal or the like having rigidity that is usually used as an artificial tooth root may be used. Of course, the shape of the head 51a is not limited to such a shape, and may be changed as appropriate, such as a spherical body. However, it is desirable to use a mitake-shaped hemispherical body.

  The denture 1 which consists of the above structure can be used by fitting with the head 51a of the artificial tooth root 51 with which it is provided in the oral cavity, as shown in FIG.3 (b). The denture 1 and the artificial root 51 constitute the attachment-type denture unit of the present invention.

  The denture 1 and the denture unit according to the first embodiment of the present invention having such a configuration have the following effects.

  By providing the stress relaxation member 22 in the fitting portion 20 provided on the artificial tooth base 2, the stress generated between the mating fitting portion 50 and the denture 1 at the time of meshing can be effectively relaxed. Therefore, damage to the denture 1 can be prevented, and thereby the durability of the denture 1 can be effectively improved.

  That is, for example, when eating with the denture 1 mounted, stress is generated due to meshing between the gingiva 5 and the denture 1. This stress is most greatly generated between the mating fitting part 50 and the fitting part 20 that are in contact with each other in a smaller area than the other parts. In the denture 1 which concerns on the 1st Embodiment of this invention, it is set as the structure provided with the stress relaxation member 22 in the fitting part 20 fitted with the head 51a, and the stress relaxation member 22 is a cushion material at the time of meshing. Will work as. As a result, the entire denture 1 sinks to the gingival 5 side at the time of meshing, and the stress generated between the counterpart fitting portion 50 provided in the oral cavity and the denture 1 is effectively dispersed, and the entire bottom surface of the denture 1 is loaded. Can be made. That is, it is possible to effectively prevent an excessive stress from being locally applied between the mating fitting portion 50 and the denture 1 at the time of meshing. In other words, a pseudo mucous membrane can be formed between the mating mating portion 50 and the denture 1, and the stress generated between the mating mating portion 50 and the denture 1 during mating is mated with the mating mating portion 50. The so-called point contact between the artificial tooth 3 planted at a position corresponding to the portion 20 (above the fitting portion 20) is changed to a so-called surface contact between the mating fitting portion 50 and the entire denture 1. Can be made.

  Moreover, by forming the stress relaxation member 22 with a silicone resin, it is possible to obtain a stress relaxation member that is excellent in elasticity and water resistance.

  In addition, when the head 51a is fitted to the concave groove 21, the concave groove 21 has a depth that allows a certain gap to be secured above the head 51a and a length that allows a certain gap to be secured to the left and right of the head 51a. Thus, when the denture 1 is attached to the gingiva 5, the stress relaxation member 22 can be effectively disposed on the entire outer periphery of the head 51a. Therefore, the stress relaxation action can be effectively generated for the stress in any direction generated from the denture 1 toward the gum 5. Accordingly, the denture 1 can be more efficiently prevented from being damaged during use, and the durability of the denture 1 can be further effectively improved.

  In addition, the head 51a is formed of a bowl-shaped hemispherical body whose end on the side in contact with the inner surface of the concave groove 21 (on the side in contact with the fitting portion 20) is a plane H, and the opening is narrow and the back portion is formed. The height when the denture is mounted in the oral cavity is configured by providing the stress relieving member 22 in such a configuration that a fitting space K having a treat-like cross-sectional shape that becomes wider toward the center is formed. It can be set as the denture 1 and denture unit which can be restrained effectively. In addition, by using a silicone resin rich in elastic force as the stress relieving member 22, a fitting space K having a treat-like cross-sectional shape in which the opening is narrow and wide toward the back is provided. Even if it is a structure, when fitting the fitting part 20 on the head 51a, the opening can be temporarily expanded following the shape of the head 51a, and the fitting work can be easily performed. Can do. Moreover, after fitting the fitting part 20 to the head 51a, it can prevent effectively that the denture 1 remove | deviates from the head 51a.

That is, as a conventional attachment-type denture and a denture unit using the denture, first, as shown in FIG. 9A, a head 91a of an artificial tooth root 91 made of metal such as metal or titanium, a resin, etc. There is a configuration in which a concave groove 81a provided in an artificial tooth base 81 made of synthetic resin is fitted.
Further, as shown in FIG. 9 (b), since the attachment / detachment operation is easy, the permanent magnet 91b provided in the artificial tooth root 91 and the permanent groove 81a provided in the artificial tooth base 81 formed of a synthetic resin such as a resin are provided. Some have a configuration in which the magnet 83 is bonded.
In FIG. 9A, a denture unit is constituted by the denture 8a and the artificial root 91. In FIG. 9B, a denture unit is configured by the denture 8b and the artificial root 91.
Here, the gingiva 90 is a base on which the dentures 8a and 8b are mounted, and there are a tooth root 92 and an alveolar bone 93 inside, and an artificial tooth root 91 is provided on the tooth root 92.

  In such a conventional denture unit using attachment-type dentures 8a, 8b and dentures 8a, 8b, the concave groove 81a and the head 91a of the denture 8a, the permanent magnet 83 of the denture 8b, and the permanent part on the gingival 90 side are used. The magnets 91b are in close contact with each other. Therefore, the stress generated between the dentures 8a, 8b and the gingiva 90 at the time of meshing is locally applied to the artificial tooth 82 implanted at a position corresponding to the artificial tooth root 91 (a position immediately above the artificial tooth root) without escape. Will be. Therefore, there has been an inconvenience that the artificial tooth implanted at the position corresponding to the artificial tooth root is easily damaged such as cracking.

  Therefore, the denture 1 and the denture unit using the denture 1 according to the first embodiment of the present invention can effectively relieve the stress generated between the artificial root 51 and the denture 1 at the time of meshing. Damage to the denture 1 can be prevented. Thereby, it can be set as the denture 1 which can improve durability effectively. Further, as a configuration for preventing the denture (artificial tooth) from being damaged due to the generation of local stress at the time of meshing, it is not necessary to use a reinforcing metal member that has been conventionally arranged inside the denture. . Therefore, it can be set as the denture 1 which can be reduced in cost and weight. Moreover, according to the denture unit of this invention, in the fitting type denture unit as shown to Fig.9 (a), the height at the time of mounting | wearing a denture in an oral cavity can be suppressed effectively. Furthermore, it can be set as the denture 1 and the denture unit which are easy to mount and difficult to come off after mounting.

  Next, with reference to FIG. 5, the denture 10 and the denture unit using the denture 10 which concern on the 2nd Embodiment of this invention are demonstrated. The denture 10 and the denture unit according to the second embodiment of the present invention are part of the configuration of the fitting portion provided on the denture relative to the denture 1 and the denture unit according to the first embodiment of the present invention described above. Are configured differently. Other configurations are the same as those of the denture 1 and the denture unit using the denture 1 according to the first embodiment of the present invention described above. The following detailed description will be omitted.

  Specifically, as shown in FIG. 5, a concave groove 21 that forms a concave portion corresponding to the artificial tooth root 51 (convex portion) of the mating fitting portion 50, and a first housing that is detachably attached to the concave groove 21. The fitting portion 20 is formed by the member 23 and the stress relaxation member 22 provided on the inner surface of the first housing member 23. More specifically, the first housing member is detachably attached to the concave groove 21 provided in the artificial tooth base 2 on the outer surface side, and includes a recess 23a that fits the head 51a of the artificial tooth root 51 on the inner surface side. 23 and the stress relieving member 22 having a fitting space K corresponding to the size of the head portion 51a form the fitting portion 20.

  In the present embodiment, as a configuration in which the first housing member 23 is detachably attached to the concave groove 21, a pair of fitting convex portions 23 b provided on the outer periphery of the first housing member 23 are provided in the concave groove 21. A configuration is adopted in which the fitting recess 21a is fitted. Of course, the present invention is not limited to such a configuration, and any configuration may be used as long as the first housing member 23 can be detachably attached to the concave groove 21.

  Note that the vertical length J of the first housing member 23 shown in FIG. 5B is the same as the depth of the concave groove 21, and the horizontal length L is the same as the width of the concave groove 21. It is necessary. Further, it is desirable that the vertical length M of the fitting convex portion 23b is about 0.5 mm and the horizontal length N is about 0.2 mm. The first housing member 23 can be formed of a resin such as acrylic resin.

  By setting it as the structure of the denture 10 which concerns on such 2nd Embodiment of this invention, the fitting part 20 which can be attached or detached with the 1st housing member 23 and the stress relaxation member 22 can be formed. Therefore, only the fitting part 20 can be replaced easily, the durability of the denture 1 can be further improved, and the denture 10 that can be easily handled can be obtained.

  In other words, even if the fitting part 20 (especially the stress relieving member 22) needs to be replaced due to wear due to use, the dentist does not bring the denture 10 into the dental laboratory, but the dentist uses a dedicated instrument. It becomes possible to remove the fitting part 20 from the artificial tooth base 2 and to attach a new fitting part 20 by using. Therefore, the user of the denture 10 can return to the home after completing the replacement of the fitting portion 20 on the same day as the visit to the dental clinic without leaving the denture 10 at the dental clinic. Accordingly, it is possible to create an environment that actively visits the dental clinic without giving the denture user the worry of leading a lame life due to the absence of the denture. Moreover, for a dentist, a quick treatment is possible, and an efficient examination can be realized.

  Next, a denture unit 100 using the denture 100 and the denture 100 according to the third embodiment of the present invention will be described with reference to FIG. The dentures 100 and the denture unit using the dentures 100 according to the third embodiment of the present invention use the dentures 1 and 10 and the dentures 1 and 10 according to the first and second embodiments of the present invention described above. A part of the configuration of the fitting portion provided in the denture is different from the denture unit. Since the other configurations are the same as those of the dentures 1 and 10 and the denture units using the dentures 1 and 10 according to the first and second embodiments of the present invention described above, the same members and the same functions are achieved. Are given the same numbers, and the following detailed description is omitted.

  Specifically, as shown in FIG. 6, in addition to the configuration of the denture 10 according to the second embodiment of the present invention described above, the gap between the concave groove 21 that forms the recess and the first housing member 23. In addition, a second housing member provided with a recess 24a that can be attached to the concave groove 21 provided in the artificial tooth base 2 on the outer surface side via an adhesive and to which the first housing member 23 can be detachably attached on the inner surface side. 24 is provided.

  In the present embodiment, as shown in FIG. 6B, the first housing member 23 is detachably attached to the second housing member 24, and a pair of outer housings are provided on the outer periphery of the first housing member 23. A configuration is adopted in which the fitting convex portion 23 b is fitted into a fitting concave portion 24 b provided in the second housing member 24. Of course, the present invention is not limited to such a configuration, and any configuration may be used as long as the first housing member 23 can be detachably attached to the second housing member 24.

  Note that the vertical length P of the second housing member 24 shown in FIG. 6B is the same as the depth of the concave groove 21, and the horizontal length Q is the same as the width of the concave groove 21. It is necessary. The second housing member 24 can be formed of a resin such as acrylic resin.

  By adopting such a configuration of the third embodiment of the present invention, the detachable fitting portion 20 can be formed by the first housing member 23 and the stress relaxation member 22. Therefore, only the fitting part 20 can be replaced easily, the durability of the denture 100 can be further improved, and the denture 100 can be easily handled. Further, the outer surface of the first housing member 23 constituting the so-called replacement unit does not come into contact with the artificial tooth base 2. Therefore, it is possible to effectively prevent the artificial tooth base 2 from being damaged at the time of exchanging the fitting portion 20 or the like, and the denture 100 having higher durability can be obtained.

  Next, with reference to FIG. 7, the modification of the fitting part provided in the oral cavity which concerns on embodiment of this invention is demonstrated. In this modification, the configuration of the artificial tooth root is changed with respect to the first embodiment of the present invention described above. Other configurations are similar to the denture 1 and the denture unit using the denture 1 according to the first embodiment of the present invention described above. The following detailed description will be omitted.

  Specifically, in this modification, the artificial tooth root is formed by a so-called implant. That is, a concave groove 7a is formed in the alveolar bone 7 in a portion without a tooth root, and an implant body 51b as an artificial tooth root is attached to the concave groove 7a, and a head formed of metal at an upper end portion of the implant body 51b. The artificial tooth root 51 is formed by connecting 51a (so-called superstructure). By setting it as such a structure, the other party fitting part 50 by the side of the gum 5 can be formed also in the part in which a tooth root does not remain. The denture 1 according to the first embodiment of the present invention can be used effectively even for an artificial tooth root having such a configuration. In addition, the artificial tooth root comprised with such an implant body and a head can be used effectively also with respect to the denture based on the 2nd, 3rd embodiment of this invention mentioned above.

  Furthermore, as a structure which forms the fitting part provided in an oral cavity with what is called an implant, it is not restricted to the structure of this modification. For example, as shown in FIG. 8A, the fitting portion 60 may be formed by an artificial tooth root 61 including an implant body 61b, a head portion 61a thereof, and a head connecting jig 61c. Specifically, a head connection jig 61c (so-called Dolder bar) is attached to the heads 61a of the plurality of implant bodies 61b, and the plurality of heads 61a are integrally connected to be provided in the oral cavity. It is good also as a structure which forms the one fitting part 60. FIG. The “convex portion of the mating fitting portion” in the present invention is a concept including a configuration in which a separate body (a head coupling jig 61c) is mounted on the head 61a. In this case, as shown in FIG. 8 (b), the artificial tooth base 2 is provided with a concave groove 25 corresponding to a head coupling jig 61c (so-called Doulder bar) and the size of the head coupling jig 61c. A stress relaxation member 22 having a fitting space corresponding to the height is provided. By setting it as such a structure, while being able to relieve | moderate the stress which arises between an artificial tooth root and a denture at the time of meshing more effectively, it can be set as the denture which can prevent the shift | offset | difference at the time of use. Of course, in the case of this configuration, the first housing member and the second housing member may be provided in the fitting portion of the artificial tooth base as in the second and third embodiments of the present invention described above. .

  In the embodiment of the present invention, only the denture used by being installed in the oral cavity of the lower jaw is described. However, the present invention is not limited to such a configuration, and is used by being mounted on the palate. Of course, this denture is also effective.

  Further, in the embodiment of the present invention, it is assumed that no natural tooth is present in the gingiva 5 of the person wearing the denture 1, and all the teeth are formed by the artificial teeth 3. The present invention is not limited to the configuration, and the present invention is also effective for a configuration in which natural teeth do not exist partially (so-called partial dentures).

  In the third embodiment of the present invention, the second housing member 24 is attached to the concave groove 21 via an adhesive. However, the present invention is not limited to such a configuration. 24 may be detachably attached to the concave groove 21.

  The present invention can be used as an attachment denture and an attachment denture unit using the denture.

DESCRIPTION OF SYMBOLS 1 Denture 2 Artificial tooth base 2a Upper base 2b Outer base 2c Inner base 3 Artificial tooth 5 Gingiva 6 Tooth root 6a Concave groove 7 Alveolar bone 7a Concave groove 8a Denture 8b Denture 10 Denture 20 Fitting part 21 Concave groove 21a Concave concave part 22a Relief member 23 First housing member 23a Recess 23b Fitting convex portion 24 Second housing member 24a Recess 24b Fitting concave portion 25 Concave groove 50 Mating portion 51 Artificial root 51a Head 51b Implant body 60 Mating portion Part 61 Artificial root 61a Head 61b Implant body 61c Head connecting jig 81 Artificial tooth base 81a Concave groove 82 Artificial tooth 83 Permanent magnet 90 Gingiva 91 Artificial root 91a Head 91b Permanent magnet 92 Dental root 93 Alveolar bone 100 Denture D Deep E Width F Height G Width J Length K Fitting space L Length M Length N Length P Length Q Length H Plane

Claims (6)

  An attachment comprising an artificial tooth base abutting on the oral cavity and an artificial tooth implanted on the artificial tooth base, and fitting the fitting part provided on the artificial tooth base to a mating fitting part provided in the oral cavity. A denture of the type, wherein a fitting portion provided on the artificial tooth base is provided with a stress relaxation member that relieves stress generated between the counterpart fitting portion and the denture.   The denture according to claim 1, wherein the fitting portion is formed by a concave portion corresponding to the convex portion of the counterpart fitting portion and a stress relaxation member provided on the inner surface of the concave portion.   The fitting portion is formed by a concave portion corresponding to the convex portion of the counterpart fitting portion, a first housing member that is detachably attached to the concave portion, and a stress relaxation member provided on the inner surface of the first housing member. The denture according to claim 1, wherein:   The denture according to claim 3, further comprising a second housing member between the recess and the first housing member to which the first housing member can be detachably attached.   The denture according to any one of claims 1 to 4, wherein the stress relaxation member is formed of a silicone resin.   An attachment-type denture unit comprising the denture according to any one of claims 2 to 5 and an artificial tooth root provided with a convex portion that fits into the concave portion of the denture, wherein the convex portion is a portion of the concave portion. A denture unit characterized in that the end portion on the side in contact with the inner surface is a bowl-shaped hemispherical body having a flat surface.

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