JPH034255Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a wax build-up molding device used when forming a denture model using dental wax on a jaw model taken from a patient. This is an attempt to improve the part that performs the build-up forming work.

<Conventional technology> Generally, in wax build-up molding work in dental technology, the wax spatula is first heated to soften or melt the solid wax and scooped out, and then warmed again to make it liquid, and then it is heaped onto the part to be molded. This process is usually repeated 10 times for each tooth. Conventionally, each time this work was performed, the technician's viewpoint would shift away from the part to be molded, making it impossible to concentrate on the work, resulting in extremely inefficient work. To solve this problem, for example, there is a technique disclosed in Japanese Utility Model Publication No. 61-6900.
This technique involves heating and melting the wax in advance.
This is allowed to gradually flow down to the spatula. Further, as a wax pouring structure, there is a technique disclosed in, for example, Japanese Utility Model Publication No. 13048/1983.
This technique is used when forming dowels such as post crowns, and has a dish-shaped part that retains molten wax and a needle-shaped part formed at an angle to this dish-shaped part. Through the grooves formed in this needle-like part, it is poured into the pores for forming the dowel.

Furthermore, as a prior art proposed by the present inventor, there is an invention described in Japanese Patent Application No. 61-268086.

<Problems to be solved by the invention> In the former prior art mentioned above, since the wax is heated and melted in advance, there is a time lag before the building up work is performed, and during this time the components of the wax separate. There is a problem that it may become damaged or deteriorate.

In addition, in the latter prior art described above, molten wax held in a dish-shaped member is poured into a hole through a needle-shaped member, and a minute amount is poured around the crown of the tooth, the occlusal surface, etc., and built up, or the cusps are shaped. It is unsuitable for detailed work.

Furthermore, a patent application filed in 1983 related to the proposal of the present inventor
In the apparatus disclosed in the specification of No. 268086, it is difficult to adjust the flow of molten wax from the first retention part to the second retention part, and a large amount of wax flows in at once.

The present invention solves these problems.

<Means for Solving the Problems> The wax build-up molding device according to the present invention has a first metal retention section formed in a dish shape and having a capacity capable of retaining the amount of wax necessary for multiple build-up molding operations. ,
A metal second retention part formed in an elongated dish shape and having a capacity for retaining a smaller amount of wax than the first retention part, and having a thin groove at the tip, the first retention part and the second retention part. and connect the first retention part to the second retention part.
a narrowed part having a small hole through which the molten wax flows into the retention part, and also having a lateral depression and a depression on the lower surface;
It consists of a heater that heats the first retention part, the second retention part, and the narrowed part.

<Function> A predetermined amount of molten wax, for example, the amount required for about 3 to 5 building up operations (about 0.05 to 0.1 cc).
degree) of wax is accumulated in the first retention part. Thereafter, the first retention section is slightly tilted forward, and the wax flows into the second retention section through the small hole in the narrowed section. At this time, the molten wax accumulated in the second retention part is held at the maximum amount by its surface tension, and is replenished by the amount that flows down from the tip to the part to be formed. The supply speed of wax from the first retention part to the second retention part can be controlled by the wax passage resistance member.

<Embodiment> In FIGS. 1 to 3, reference numeral 1 denotes an elongated rod-shaped gripping portion made of plastic or the like, and has a through hole 2. As shown in FIGS. 3 is a wax melting part fixed to the tip of this gripping part 1 via a connecting pipe 4 and a heat insulator 5, 6 is a molding part fixed to the lower end of this wax melting part 3, and 7 is inside the wax melting part 3. It is a buried heater, and the wax melting part 3 and the forming part 6
heat up. The heater 7 includes a connecting pipe 4 and a heat insulator 5.
Power is supplied by a cord 8 that penetrates into the grip 1 and is taken out from the rear end of the grip 1. Reference numeral 9 denotes a stop member made of a substantially L-shaped wire that is attached to the grip portion 1 so as to be movable back and forth, and 10 is a slide camera in which the stop member 9 is moved back and forth. A wax rod 11 is inserted into the through hole 2 of the grip part 1.
is inserted, and when the grip part 1 is lifted diagonally, the wax rod 11 descends due to its own weight, comes into contact with the stop member 9, and stops. Incidentally, in order to further improve the lowering of the wax rod 11 due to its own weight, a weight may be fixed to the rear end of the wax rod 11. The diameter of the through hole 2 of the gripping part 1 must be slightly larger than the wax rod 11 used, and in the case of a wax rod with a diameter of 4 mm, the diameter is approximately 5 mm.
It is about mm to 7 mm. The wax melting part 3 is
It has a substantially columnar shape, and its lower end is fixed to the molding part 6,
Its upper end projects on the line of descent of the wax rod 11. The molding section 6 has a first elongated dish shape in which the wax flowing down from the wax melting section 3 stays.
A retention part 12 and a first retention part 12 in front of the first retention part 12.
A second similarly elongated dish-shaped plate is provided at an angle of about 15° to 20° diagonally downward with respect to the retention portion 12.
a retention section 13, these first and second retention sections 12,
13, and a narrowed part 14 connecting the narrowed parts 1 and 13.
4 is formed with a small hole 15 having a diameter of about 0.3 to 1.0 mm, which communicates the first retention part 12 and the second retention part 13. The first retention section 12 has a capacity capable of retaining the amount of wax necessary for a series of multiple (approximately 3 to 5) heaping operations, and the second retention section 13 a smaller amount, e.g. approximately 1
It has the capacity to retain the amount of wax necessary for multiple building up operations. In actual work, the amount of wax varies depending on the size and shape of the tooth, but the capacity of the first retention part 12 is approximately 0.05 to 0.1cc, and the capacity of the second retention part 13 is approximately 0.05 to 0.1cc. ,about
Approximately 0.01 to 0.04cc is appropriate. Reference numeral 16 denotes a narrow groove formed at the tip of the second retaining part 13, which has an open end at the front, through which the wax flows down to the molded part in a dot or line pattern. . The narrowed portion 14 is formed to be thin in both the horizontal and vertical directions, and is positioned upward in the vertical direction. As a result, the small hole 15 is also located upward, and the wax accumulated in the first retention part 12 can be removed from the second retention part 12 unless the first retention part 12 is tilted forward considerably.
It does not flow into. Fig. 2 shows the lateral depression C, and Fig. 3 shows the depression D on the lower surface. Molding part 6
The wax melting section 3 is made of a metal with good thermal conductivity, such as copper, brass, nickel-chromium alloy, cobalt-chromium alloy, etc. Also, the molding part 6
The first retaining portion 12, the second retaining portion 13, and the narrowing portion 14 that constitute the are integrally formed of the above-mentioned metal.
The wax melting section 3 and the forming section 6 are heated to about 100° C. by a heater 7. The heating temperature by the heater 7 is approximately 80℃ depending on the material of the wax.
It is set in the range of ℃ to 120℃. Stricture part 14
As shown in FIG. 3, a wax passage resistance member 17 made of cotton, welt, sponge, etc.
can be filled. This filling of the wax passage member 17 is particularly effective when the diameter of the small hole 15 is large.

In the apparatus configured as described above, by pushing the slide camera 10 with a finger in the direction of arrow A, the stop member 9 is moved forward, and the tip of the wax rod 11 is brought into contact with the heated wax melting part 3. As a result, the wax rod 11 is melted, flows down along the wax melting section 3, and is retained in the first retaining section 12 of the forming section 6. The amount of wax melted is determined by the time the stop member 9 is pushed forward, which is determined by the technician taking into account the build-up operation. When the amount of wax reaches a predetermined amount, the slider 10 is moved in the direction of arrow B, the stop member 9 is separated from the wax melting section 3, and the melting of the wax is stopped.
The molten wax retained in the first retention part 12 is poured into the second retention part 13 through the small hole 15 of the narrowed part 14 by tilting the tip of the molding part 6 downward. When the forming part 6 is tilted as shown in FIG. 4, the molten wax W accumulated in the second retention part 12
1 is the maximum amount that can be maintained by surface tension, and the surface swells slightly. At this time, the molten wax W2 accumulated in the first retention part 12 is transferred to the narrowed part 14.
It flows to the side and becomes swollen due to its surface tension. In such a state, the second retention section 1
When the thin grooves 16 at the three tips are applied to the part to be formed or moved, dotted or linear wax can be formed. At this time, approximately the same amount of wax flowing out from the second retention part 13 to the part to be formed is in the first part.
As long as the wax is automatically replenished from the retention part 12 through the small hole 15 and the wax is maintained at approximately the same slope, the amount of wax in the second retention part 13 maintained by surface tension will not change significantly.

In the build-up molding work, when molding the periphery of the tooth neck part a of the model tooth 18, as shown in FIG.
This is done by stroking the poured wax on the lower surface of the retention section 13. During this operation, due to the presence of the depression D, there is little possibility that other parts of the molded part 6 will come into contact with the bulge b. Therefore, there is very little chance of contact with the wax of the bulge b which has already been formed and melting and deforming it. Furthermore, as shown in FIG. 5, when forming the arc-shaped gap periphery c of the model tooth 18, there is a risk that it will come into contact with the corner part d of the adjacent tooth 18'; sexuality is kept to a minimum. In this way, the surrounding area of the tooth crown, the occlusal surface, the cusp head, etc. can be shaped freely.

<Effect of invention> According to the present invention, the following effects can be achieved.

(a) The molded part is divided into a first retention part and a second retention part, and both retention parts are connected through a small hole in the narrowed part. The amount of wax required for a plurality of building-up operations is retained in the first retention section, and a smaller amount of wax, for example, the amount of wax required for one-time construction work, is retained in the second retention section. Therefore, it is possible to flow down to the part to be built up while checking the amount of wax required for one time building up operation in the first retention part. Such a structure makes it possible to perform fine shaping operations on the cusp, such as placing wax in dots or drawing lines.

(b) The first retention part and the second retention part are separated by a narrowed part, and the molten wax flows from the first retention part to the second retention part through a small hole. Therefore, the surface tension of the molten wax accumulated in the second retention section holds a constant amount, and the amount that flows out is replenished through the small hole. Further, the wax accumulated in the first retention part is also blocked by the narrowed part, and maintains a swollen state due to surface tension. This structure prevents the wax from flowing all at once from the first retention part to the second retention part, and allows the wax to be supplied from the tip of the second retention part slowly, as if writing with a fountain pen. be.

(c) In the first retention part, the amount of wax necessary for several times of building up work is melted immediately before the work.
Since the wax is allowed to stagnate, problems such as alteration and deterioration of the wax do not occur.

(d) Since the narrowed portion is provided between the first retention portion and the second retention portion, the recesses formed in the lateral direction and lower surface of the narrowed portion facilitate the construction work. In other words, since the tooth model has many irregularities, it is easy for the lower surface of the mold to come into contact with a surface other than the part being worked on during the molding process, causing the wax surface in this part to melt.
According to the present invention, the occurrence of such accidents is extremely reduced.

(E) By filling the small hole in the narrowed part with a wax passage resistance material such as cotton, wax is prevented from rapidly flowing from the first retention part to the second retention part, and wax supply suitable for build-up molding work is achieved. You can get speed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a wax build-up forming device according to an embodiment of the present invention, Fig. 2 is a top view of the forming part, Fig. 3 is a sectional view taken along the line shown in Fig. 2, and Fig. 4 is a build-up forming device. FIG. 5 is a side view showing one state of the work and a top view showing another state of the build-up forming work. DESCRIPTION OF SYMBOLS 1... Gripping part, 2... Through hole, 3... Wax melting part, 6... Molding part, 7... Heater, 9... Stopping member, 10... Slide taking, 11... Wax stick, 12 ...First retention part, 13...Second retention part, 14...Narrowing part, 15...Small hole, 16...Small groove, 17...Wax passage resistance member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A first metal retention portion formed in a plate shape and having a capacity to retain the amount of wax necessary for multiple build-up forming operations; a metal second retention part having a capacity for retaining a smaller amount of wax than the first retention part and having a thin groove at the tip; a metal second retention part connecting the first retention part and the second retention part; A constriction part having a small hole through which the molten wax flows from the molten wax to a second retention part, a lateral depression and a depression on the lower surface, and a heater for heating the first retention part, the second retention part, and the narrowed part. Wax build-up forming device. (2) The diameter of the small hole in the narrowed area is approximately 0.3 mm to 1.0 mm.
A wax build-up molding device according to claim 1 of the utility model registration claim. (3) The wax build-up forming apparatus according to claim 1 or 2, wherein the small hole of the narrowed portion is filled with a wax passage resistance member.