JP3019527U - Full denture - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a complete denture having excellent durability by reliably preventing cracking in the midline of the denture base. [Constitution] The denture base 11 is molded from resin,
An artificial tooth group 12 is implanted in the denture base 11. A back surface 13A is provided on the pair of central incisors 13 and 13 that constitute the artificial tooth group 12.
An engaging groove 14 having a substantially C-shaped cross section is formed in the vertical direction. The fixture 15 made of metal is formed in a substantially H shape from a bridging piece 15A and fitting pieces 15B and 15B provided at both ends of the bridging piece 15A. Each fitting piece 15B is inserted and fitted into the engaging groove 14 of the central cutting tooth 13 and is brought into a state in which the pair of central cutting teeth 13 and 13 are coupled by the fixture 15 so as not to be separated from each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a complete denture formed by molding a denture base with a synthetic resin, and more particularly to a complete denture that does not crack in the denture base.

[0002]

[Prior art]

 Generally, a complete denture is composed of a denture base 1 attached to the mucous membrane of the palate and a pair of central incisors 2A and 2A as shown in FIG. 8, and an artificial tooth group 2 implanted in the denture base 1. It consists of Conventionally, metal, resin, etc. have been used as the material for the denture base that constitutes the complete denture, but methyl methacrylate has the advantages of providing a color tone close to that of the natural palate and being easy to mold. Resin (hereinafter referred to as resin) is used.

[0003]

[Problems to be solved by the device]

 However, when a denture base 1 is formed of a resin when manufacturing a complete denture, the force applied to the central incisors 2A and 2A during mastication causes the pair of central incisors 2A and 2A to receive forces in opposite directions. As a result of the separation, as shown in the figure, a phenomenon that a crack A occurs in the median 1A located between the inner central incisors 2 A and 2 A of the denture base 1 occurs, and once the crack A occurs, the crack A is generated. There is a drawback that it gradually expands toward the center of the denture base 1.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and an object thereof is to provide a denture having excellent durability by surely preventing cracks from occurring in the midline of the denture base. To do.

[0005]

[Means for Solving the Problems]

 Means of the present invention configured to solve the above-mentioned problems comprises a denture base made of synthetic resin and an artificial tooth group which is configured to include a pair of central incisors and is implanted in the denture base. In the complete denture, an engaging groove is formed on each back surface of the pair of central incisors, and a fitting portion is formed at each end of the bridging piece to be fitted into each engaging groove. Consists of connecting so as to span between incisors.

[0006]

[Action]

 Since a pair of central incisors are connected by a fixture and the central incisors do not separate from each other due to the force received during mastication, there is no force that causes cracking in the midline of the denture base.

[0007]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In the figure, reference numeral 11 denotes a denture base molded with a resin. An artificial tooth group 12 is implanted in the denture base 11, and the artificial tooth group 12 is configured to include a pair of central incisors 13 and 13 which are located in the middle of the denture base 11.

Reference numeral 14 denotes an engaging groove which is vertically recessed in the convex curved back surface 13 A of each of the central incisors 13, and the engaging groove 14 has a longitudinal intermediate portion 14 A having a substantially downward C-shaped cross section. Both ends in the longitudinal direction have a flat C-shape facing downward, and both ends 14B and 14C in the vertical direction are in an open state.

Reference numeral 15 denotes a fixture for fixing the pair of central incisors 13, 13. The fixture 15 is formed by integrally forming a bridging piece 15A and a pair of fitting pieces 15B and 15B formed in a substantially H shape at both ends of the bridging piece 15A with a metal such as nickel. It consists of Each of the fitting pieces 15B has a columnar shape in which the middle in the longitudinal direction has a substantially O-shaped cross section and the both ends in the longitudinal direction have a flat O-shaped so that the fitting pieces 15B are closely inserted into the engaging grooves 14 of the central incisor 13. It is formed on.

The complete denture of this embodiment has the above-mentioned structure, and when manufacturing, the engaging groove 14 is formed in each central cutting tooth 13, and each fitting piece 15 B of the fixture 15 is engaged with the engaging groove 14. By inserting and fitting the resin into the groove, the pair of central incisors 13, 13 are firmly connected via the bridging piece 15A. Moreover, in this embodiment, the engaging groove 14 has the intermediate portion 14A recessed in a substantially C-shaped cross section, and the fitting piece 15B is formed in a columnar shape having a substantially O-shaped cross section, whereby the fitting piece 15B is axially formed. Since it is inserted and fitted from above, the fixture 15 does not come off from the pair of central incisors 13, 13. Thus, even if force is applied to the central incisor 13 during mastication, it is possible to reliably prevent the situation where the central incisors 13 are separated from each other, so that force is applied to the denture base 11 to crack the midline 11A. It never happens.

[0011]

[Effect of device]

 The present invention has been described in detail above. A pair of central cutting teeth are formed with engaging grooves, and a pair of central cutting teeth are fixed by a fixing tool that connects fitting portions to be inserted into the respective engaging grooves with bridging portions. By connecting the teeth, the pair of central incisors do not separate from each other due to the force applied during mastication, so it is possible to reliably prevent the midline of the resin denture base from cracking. It can be a full denture with excellent durability.

[Brief description of drawings]

1 to 7 relate to an embodiment of the present invention.
[Fig. 4] is an inner plan view of a complete denture.

FIG. 2 is an enlarged view of a pair of central incisors having engagement grooves formed therein.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a front view of a fixture.

5 is a sectional view taken along the line VV in FIG.

FIG. 6 is a partially enlarged view in FIG. 1 showing a state in which a pair of central incisors are connected by a fixture.

FIG. 7 is a sectional view taken along the line VII-VII in FIG.

FIG. 8 is a plan view of the inside of a full denture according to the related art.

[Explanation of symbols]

 11 Denture base 12 Artificial tooth group 13 Central incisor 14 Engagement groove 15 Fixing tool 15A Bridging piece 15B Fitting piece

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area A61C 13/10

Claims (1)

[Scope of utility model registration request] 1. A complete denture composed of a denture base made of synthetic resin and a group of artificial teeth which are configured to include a pair of central incisors and are embedded in the denture base. An engaging groove is formed on the back surface, and fittings formed by forming fitting portions to be inserted into the engaging grooves at both ends of the bridging piece are connected so as to span the pair of central incisors. Characteristic complete denture.