JPH0242258Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a denture retaining device for positioning a removable denture in the oral cavity.

<Conventional technology> This type of denture maintenance device that is conventionally used,
For example, what is shown in Japanese Patent Publication No. 60-58861 is
A denture retaining device that attaches an outer crown that is integrally provided with a denture to a remaining tooth, the leg portion being attached to the root canal of the remaining tooth, and the inner crown portion having a split so as to elastically hold the outer crown. This denture maintenance device is characterized by comprising: a protective plate disposed between the leg portion and the inner crown portion and covering the root surface of the tooth; A split is provided in the columnar inner crown to give it elasticity, and a truncated cone-shaped canopy outer crown, which is integrated with the denture, is fitted to the inner crown, so that the elasticity of the inner crown is improved during use. The denture tends to weaken, and therefore becomes loose in a short period of time, making it unstable to maintain the denture.Furthermore, since the outer crown has a canopy, that is, when the outer crown is fitted onto the inner crown. Since the canopied inner surface of the outer crown is in contact with the upper surface of the inner crown, when the fit becomes loose, it is impossible to correct the loosening by fitting the outer crown deeply into the inner crown. Therefore, it has the disadvantage that it cannot maintain the retention force of the denture.

<Problems to be solved by the invention> The present invention was devised in view of the above-mentioned circumstances. Due to the wedge effect of inserting a conical metal canopy-free cylindrical sheath,
To provide a denture maintenance device which improves the stability of denture maintenance and maintains the denture maintenance force.

<Means for solving the problem> The present invention involves inserting a metal cylindrical sheath with a substantially truncated cone shape embedded in the denture into a metal trabecular column with a substantially truncated cone shape attached to the remaining tooth root. This is what happens.

<Function> With the above configuration, a metal cylindrical sheath with a substantially truncated cone shape attached to the denture is fitted into a metal trabecular column with a substantially truncated cone shape attached to the remaining tooth root, and the jawbone The patient is fitted with dentures.

<Example> The present invention will be described below based on the drawings of an example.

Fig. 1 is a perspective view of a metal cylindrical sheath with an approximately truncated conical shape, Fig. 2 is a plan view thereof, Fig. 3 is a perspective view of a metal small column having an approximately truncated conical shape, and Fig. 4 5 is a front view of the present invention, and FIG. 6 is a longitudinal sectional side view showing the same state of use.

Reference numeral 1 denotes a metal small pillar approximately in the shape of a truncated cone, with a leg part 1a provided at the bottom thereof, and a metal root plate 3 connected to the remaining tooth root 2 with dental cement by casting or brazing. Fixed by law.

On the other hand, the metal canopyless cylindrical sheath 4 having a substantially truncated conical shape that fits into the metal small pillar 1 has an auxiliary protrusion 4a on its lower outer periphery to facilitate connection with a synthetic resin denture 5. The metal canopy-free cylindrical sheath 4 is embedded in a predetermined position within the denture 5 base.
At this time, a small gap 5a is provided on the surface of the denture 5 above the hole 4b of the metal canopyless cylindrical sheath 4. Further, 6 is a jawbone, and 7 is an artificial tooth for a denture.

Since the present invention has the above-mentioned configuration, a substantially truncated cone-shaped metal pillar 1 attached to the remaining tooth root 2 via a metal root plate 3 is attached to a substantially truncated conical shaped pillar 1 that is embedded in the denture 5. The denture 5 can be attached to the jawbone 6 by fitting the metal canopy-free cylindrical sheath 4 as shown in FIG. When scolded,
The denture 5 is well fixed by a wedge effect in which a metal cylindrical sheath 4 having a substantially truncated cone shape embedded in the denture 5 is fitted into a metal small pillar 1 having a substantially truncated cone shape attached to the remaining tooth root 2. It won't fall out or shake during use.

Therefore, when removing the denture 5 from the jawbone 6, by pulling the denture 5 in the opposite direction to when it is attached against the aforementioned wedge effect, the metal canopy of the approximately truncated conical shape embedded in the denture 5 can be removed. The cylindrical sheath 4 protrudes from the substantially frustoconical metal pillar 1. Therefore, the denture 5 can be removed from the jawbone 6.

Further, the metal canopyless cylindrical sheath having a substantially truncated conical shape shown in FIGS. 7, 8, and 9 shows other embodiments in which the canopy-shaped cylindrical sheath is elliptical when viewed from above, and FIGS.
The generally frustoconical metal small pillars shown in FIGS. 11 and 12 show another embodiment in which the above-mentioned cylindrical sheath is fitted, and are elliptical when viewed from above.

<Effects of the invention> As described above, the present invention embeds the metal cylindrical sheath 4 having a substantially truncated conical shape into the denture 5, and attaches it to the metal trabecular column 1 having a substantially truncated conical shape which is attached to the remaining tooth root 2. ,
Since this is a denture maintenance device characterized by fitting the metal canopy-free cylindrical sheath 4, the metal trabecular column 1 having a substantially truncated conical shape attached to the remaining tooth root 2,
Due to the wedge effect of fitting the metal cylindrical sheath 4 without a canopy, which is embedded in the denture 5 and has a substantially truncated conical shape, the maintenance stability of the denture 5 is improved, and the cylindrical sheath 4 is without a canopy. , it can be deeply inserted into the metal small pillar 1,
At this time, even if the upper end of the metal small pillar 1 slightly protrudes above the upper end of the metal canopy-free cylindrical sheath 4, there is no problem because the small gap 5a is provided in the denture 5 surface as described above. Therefore, the retaining force of the denture 5 can be maintained. Furthermore, since the present invention has an extremely simple structure, it can be mass-produced, and since the metal cylindrical sheath 4 has a substantially truncated conical shape and has no canopy, it can be cut into rounds according to the height of the metal small pillar 1. For example, it has the effect of being able to easily match the metal small pillar 1.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a metal canopyless cylindrical sheath having a substantially truncated conical shape;
Fig. 2 is a plan view of the same, Fig. 3 is a perspective view of a substantially truncated cone-shaped metal small column, Fig. 4 is a plan view of the same, Fig. 5 is a front view of the present invention, and Fig. 6 is the same use. FIG. 7 is a longitudinal side view showing the state of the case, and FIG. 7 is a plan view of another embodiment, and FIG. 9 is a side view of the same, FIG. 10 is a plan view of the substantially truncated conical metal small pillar, FIG. 11 is a front view of the same, and FIG. 12 is a side view of the same. DESCRIPTION OF SYMBOLS 1...Metal trabeculae having an approximately truncated cone shape, 2...Remaining tooth root, 4...Metal canopyless cylindrical sheath having an approximately truncated cone shape, 5...Denture.

Claims (1)

[Scope of utility model registration request] A metal canopyless cylindrical sheath having a substantially truncated cone shape is embedded in the denture, and the metal canopyless cylindrical sheath is fitted into a metal trabecular column having a substantially truncated cone shape attached to the remaining tooth root. denture retainer.