JP2006167089A - Hookless fixation denture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide hookless fixation denture which can be mounted while hardly putting burdens on remaining teeth. <P>SOLUTION: The hookless fixation denture is provided with a falling prevention part 7 made of synthetic resin, which is freely detachably mounted on the defective part L of the teeth and locked to the side face of the teeth. Also, the denture is provided with a denture body composed of a plurality of implants which are connected through a connection part, can be attached to the plurality of noncontinuous defective parts and are embedded in the gingiva part of the defective part of the teeth, a bar joined to the implants and the falling prevention part made of the synthetic resin. The falling prevention part is freely attachable to and detachable from the bar and is locked to the bar. The synthetic resin to be used is a modified polyethylene resin or vinyl chloride or silicone rubber. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a toothless fixed denture that is attached to a missing part of a tooth in order to restore the function of the missing tooth, for example.

  As a conventional denture, a type that is fixed to a remaining tooth by a spring is common.

  However, in the above-mentioned conventional denture, there is a possibility that a force swinging back and forth and right and left is applied to the tooth on which the spring is hung and the life of the tooth is remarkably shortened or the force leads to extraction.

  The present invention has been made in consideration of the above-described matters, and an object of the present invention is to provide a self-fixing denture that can be mounted with almost no burden on the remaining teeth.

  In order to achieve the above object, the self-fixing denture of the first invention is provided with a synthetic resin retaining portion that is detachably attached to a tooth defect portion and is locked to a side surface of the tooth. (Claim 1).

  A plurality of the anchorless fixed dentures may be connected to each other via a connecting portion and attached to a plurality of non-continuous missing portions (Claim 2).

  The toothless fixed denture of the second invention is configured to be detachable with respect to the plurality of implants embedded in the gingival part of the missing portion of the tooth, a bar joined over these implants, And a denture body having a synthetic resin retaining portion that is locked to the bar (claim 3).

  Specifically, the retaining portion can be formed of a modified polyethylene resin, hard vinyl, or silicon rubber (claim 4).

  In the inventions according to claims 1 and 2, it is possible to obtain a self-fixing denture that can be easily mounted with little burden on the remaining teeth.

  In the invention according to claim 3, an unfixed fixed denture that can be easily mounted with little burden on the remaining teeth is obtained.

  In the invention which concerns on Claim 4, the said unfixed fixed denture can be manufactured more easily and at low cost.

  1 to 5 show a toothless fixed denture (hereinafter referred to as a denture) 1 according to a first embodiment of the present invention. As shown in FIG. 2, the denture 1 is detachably attached to a portion L in which one tooth is missing, and as shown in FIGS. 1 to 3, And a simulated gingival part 3 having an appearance of the gingival part. This denture 1 is formed so as to conform to the shape and the like of the crown portion 4 and the gingival portion 5 of the tooth remaining at the position facing the defect portion L. Further, the denture 1 is provided with left and right retaining portions 7 that are engaged with the side surfaces of the tooth (the crown portion 4) remaining at the position facing the defect portion L.

  Specifically, the simulated crown part 2 and the simulated gingival part 3 are each made of, for example, acrylic resin, and the simulated gingival part 3 is located outside the gingival part 5 of the missing tooth portion L as shown in FIGS. It has a pair of skirt parts 8 and 8 which covers (outer oral cavity) and inner side (inner oral cavity).

  On the other hand, as shown in FIG. 3, the retaining portion 7 is substantially U-shaped along the side surface of the tooth (crown portion 4) remaining at the position facing the defect portion L, for example, a sheet. It is made of a modified polyethylene resin or hard vinyl. Further, the retaining portion 7 is joined to the simulated crown portion 2 and the simulated gingival portion 3 through, for example, an immediate polymerization resin, and at this time, the surface of the retaining portion 7 is treated with dichloromethane.

  Then, the abutment portion 7a of the retaining portion 7 (portion indicated by hatching in FIG. 3) abuts the side surface of the tooth (dental crown portion 4) remaining at the position facing the missing portion L, so that the denture 1 is missing. The state where the portion L is mounted is maintained. Here, as shown in FIG. 2, the abutting portion 7 a is positioned (protruded) laterally on the side surface of the crown portion 4 as it approaches the distal end side (upper side in FIG. 2) of the crown portion 4. It is desirable to be configured to contact the inclined portion 6 or the vicinity thereof. In this embodiment, the portion 6 is formed in the vicinity of the gingival portion 5 on the side surface of the crown portion 4.

  6-8, it is U-shaped along the lower side of the simulated crown portion 2 and is made of metal (for example, made of cobalt chrome alloy) with locking claws 9 formed at both ends. The member (rest) 10 may be provided. That is, the locking claw 9 is locked to the crown portion 4 of the adjacent tooth when the denture 1 is attached to the defect portion L, and the denture 1 sinks to the gingival portion 5 side than the adjacent tooth. Is configured to prevent.

  Moreover, as shown in FIG. 9, you may comprise so that the denture 1 may be detachably mounted | worn with the part L from which two continuous teeth were missing, or the part from which three or more continuous teeth were missing You may comprise so that it may attach to L freely. That is, in the case where the denture 1 is configured to be attached to the portion L where a plurality of continuous teeth are missing, the same number of simulated crown portions 2 as the number of teeth existing in the missing portion L are provided in the denture 1. That's fine.

  Furthermore, as shown in FIG. 10, a plurality of dentures 1 are connected via a connecting portion 11 provided only inside the oral cavity of the tooth, and can be attached to a plurality of non-continuous defective portions L at a time. May be. Here, the connecting part 11 can be formed of the same material as the simulated gingival part 2 or a material having an appropriate strength such as a metal (cobalt chromium alloy or the like). In this case, the connecting part 11 has an appearance of the gingival part. You may comprise so that it may exhibit. The connecting portion 11 can also be provided with the retaining portion 7.

  In addition, as shown in FIG. 10, when the remaining teeth are few or only isolated teeth (teeth without adjacent teeth) remain, the retaining portion 7 is made of an elastic material. Preferably, the material is formed by, for example, silicon rubber. When the retaining portion 7 is formed of silicon rubber, the retaining portion 7 can be joined to the simulated crown portion 2 and the simulated gingival portion 3 via an adhesive, for example.

  In the embodiment shown in FIGS. 1 to 10, even if a reinforcing member (not shown) having an appropriate strength such as a metal (for example, a cobalt chrome alloy) is embedded in the simulated gingival portion 3. Good. The reinforcing member can be formed in an appropriate shape such as a thin plate shape or a thin rod shape.

  11 and 12 show a denture 12 according to a second embodiment of the present invention. The denture 12 includes a plurality (two in this embodiment) of implants 13 and 13 embedded in the gingival part 5 of the tooth defect portion L, and a bar joined (for example, brazed) over the implants 13 and 13. (For example, a Dolder bar) 14, and a denture body 15 that is configured to be detachable from the bar 14 and has a synthetic resin retaining portion 15 a that engages with the bar 14. The number of the implants 13 is not limited to two and may be three or more.

  The denture body 15 has substantially the same configuration as the denture 1 and is configured to be locked to the bar 14 at the center lower side instead of the retaining portion 7 as compared with the denture 1. This is different in that a retaining portion 15a having a substantially U-shaped longitudinal section is formed, and is common in other respects, so that the description of the common portion is omitted.

  In addition, all the dentures shown in the above-mentioned two embodiments are created as follows. That is, first, a primary jaw model (prototype) obtained directly from the jaw of a subject (patient) who wants to create a denture was created, and then a secondary jaw model for creating a denture was created from this prototype. Above, a denture is created using this secondary jaw model. Here, the denture created from the secondary jaw model is usually distorted due to thermal expansion or the like and does not have a shape matching the secondary jaw model. Therefore, the secondary jaw model is not formed into the same shape as the primary jaw model, but a secondary jaw model is created in consideration of the occurrence of the distortion. In other words, when creating a denture using a secondary jaw model, the distortion generated in the denture is predicted from the prototype, and based on this prediction, a secondary jaw model is created so that the denture formed by distortion matches the prototype. To do. The denture obtained using the secondary jaw model is subjected to inspection of its accuracy and adjustment of the occlusion using the prototype before it is actually installed in the oral cavity of the subject. As a result, the accuracy of the original denture is guaranteed, and the quality of the denture is reliably improved.

It is a top view which shows roughly the structure of the mounting state of the unfixed fixed denture based on 1st Embodiment of this invention. It is explanatory drawing which shows schematically the structure of the said unfixed fixed denture. It is a perspective view which shows schematically the structure of the said unfixed fixed denture. It is a longitudinal cross-sectional view which shows schematically the structure of the mounting state of the said unfixed fixed denture. It is a top view which shows roughly the structure of the mounting state of the said unfixed fixed denture. It is a perspective view which shows roughly the structure of the modification of the said unfixed fixed denture. It is a longitudinal cross-sectional view which shows schematically the structure of the unfixed fixed denture based on the said modification. It is a top view which shows roughly the structure of the unfixed fixed denture based on the said modification. It is a top view which shows roughly the structure of the mounting state of the other modified example of the said self-fixing denture. It is a top view which shows roughly the structure of the mounting state of the further another modification of the said unfixed fixed denture. It is explanatory drawing which shows roughly the structure of the mounting state of the unfixed fixed denture based on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows schematically the structure of the said unfixed fixed denture.

Explanation of symbols

4 Crown part 5 Gingiva part 6 Recessed part 7 Retaining part L Defect part

Claims (4)

  A toothless fixed denture characterized by comprising a synthetic resin retaining portion that is detachably attached to a tooth defect portion and is engaged with a side surface of the tooth.   The unfixed fixed denture according to claim 1, wherein a plurality of non-continuous defect parts are connected via a connecting part and attached to a plurality of non-continuous parts.   A plurality of implants embedded in the gingival part of the tooth defect portion, a bar joined across these implants, and a structure made to be detachable from the bar, and made of a synthetic resin that is locked to the bar A denture-fixing denture comprising a denture body having a retaining portion.   The toothless fixed denture according to any one of claims 1 to 3, wherein the retaining portion is formed of a modified polyethylene resin, hard vinyl, or silicon rubber.

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