JPH10201774A - Work model for forming dental prosthesis - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability in forming dental prosthesis. SOLUTION: This model is so constituted that a dentiform block 2 is fixed on the upper face of a base plate 1, from the lower face of which mutually adjacent plural dowel pins 1a project, that an intermediate formed body is made by cutting out the prescribed part of this dentiform block 2 together with the base plate 1, and that a work model for forming dental prosthesis is prepared from this intermediate formed body. At least one dowel pin 1a is attached to the intermediate formed body, which is obtained by cutting out the dentiform block 2 integrally with the base plate 1; hence, there is no need of a drilling operation or a plating operation for dowel pins 1a, saving labor and time in preparing the work model, and enhancing workability in forming dental prosthesis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working model mainly used for making a prosthesis such as a crown restoration in a dental technic.

[0002]

2. Description of the Related Art In general, when a prosthesis is made by a dental technician, a denture model made of wax or plastic is manufactured, and a desired dental prosthesis is obtained from the denture model. In order to manufacture the denture model, a working model mainly made of gypsum is used.

In order to prepare this working model, first, plaster is poured into a tooth model collected from a patient to form a tooth model of an abutment tooth. Next, a hole is drilled at the lower end of the tooth profile model, and a dowel pin is inserted into the hole and fixed with an adhesive. Then, the periphery of the implanted dowel pin is further hardened with gypsum and shaped to obtain a working model of a predetermined size.

[0004]

By the way, these working models are manually made one by one.
Fine work is required for the preparation, and it is difficult to improve the workability in the preparation of the dental prosthesis, because the drilling work and the dowel pin setting work require time and effort, in particular. There was a problem.

An object of the present invention is to improve the workability in preparing a dental prosthesis by reducing the labor required for preparing a work model.

[0006]

In order to solve these problems, according to the present invention, a plurality of dowel pins adjacent to each other are fixed on a top surface of a substrate projecting from a lower surface, and a predetermined portion of the tooth block is fixed to the substrate. At the same time, a working model for producing a dental prosthesis was obtained from the cut out intermediate molded body.

In such a working model, a plurality of dowel pins are provided adjacent to the substrate in advance, and at least one dowel pin is attached to an intermediate molded body obtained by cutting out the tooth block together with the substrate. Therefore, there is no need to perform drilling work and dowel pin planting work in the preparation.

The upper surface of the substrate may be formed with a concave portion into which a fixing agent between the substrate and the tooth block can flow.
In this case, a large fixing area between the substrate and the tooth block by the fixing agent can be ensured, so that an intermediate molded body in which the substrate and the tooth block are securely fixed can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a process of producing a working model for producing a dental prosthesis according to the present invention. This working model has a plurality of dowel pins 1a.
And a tooth block 2 fixed to the upper surface of the substrate 1 and formed using a worktable B as shown. On the upper surface of the worktable B, a plurality of insertion holes b into which the dowel pins 1a can be inserted are formed.

The substrate 1 has the dowel pin 1a of 3 mm.
Each dowel pin 1a is made of reinforced plastic integrally molded with a flat plate portion 1b having a thickness of about
Are provided in two rows along the length direction of the flat plate portion 1b. On the upper surface of the substrate 1, a plurality of grooves 3 are formed along the length of the flat plate portion 1b.

The tooth-shaped block 2 is formed by pouring gypsum into a tooth mold collected from a patient. As shown in FIG. 2, the tooth block 2 is fixed to the upper surface of the substrate 1 with a fixing agent using gypsum.

Then, a portion serving as an abutment tooth of the tooth-shaped block 2 is cut off by a disc cutter (not shown) and cut out together with the substrate 1 to obtain an intermediate molded body 4 as shown in FIG. Thereafter, gypsum is further applied to the lower end portion of the intermediate molded body 4 and the periphery of the dowel pin 1a is hardened with gypsum, and is appropriately shaped to prepare a denture model of a desired abutment tooth. A working model is completed.

In the working model thus prepared, a plurality of dowel pins 1a are provided adjacent to the substrate 1 in advance, so that the intermediate molded body 4 obtained by cutting out the tooth block 2 together with the substrate 1 has at least One dowel pin 1a will accompany. Therefore, it is not necessary to separately perform a drilling operation and a doweling operation of the dowel pin 1a, and it is possible to reduce the labor involved in creating a working model.

Further, since a plurality of grooves 3 are formed on the upper surface of the substrate 1, the fixing agent flows into the recesses formed by the grooves 3 to secure a large fixing area between the substrate 1 and the tooth block 2. The substrate 1 and the tooth block 2
Can be obtained more reliably.

The arrangement of the dowel pins 1a is not limited to that shown in this embodiment, and any arrangement can be used as long as at least one dowel pin 1a can be obtained even if any abutment tooth is cut out. I just need.

The recess on the upper surface of the substrate 1 may be formed by providing a plurality of protrusions other than the groove 3.

[0017]

As described above, in the working model according to the present invention, at least one dowel pin can be provided to the intermediate molded body obtained by cutting out the tooth block together with the substrate. , Without dowel pin planting work. As a result, the labor required for creating a working model is reduced, which contributes to the improvement of workability in creating a dental prosthesis.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one working process of a working model according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a perspective view showing the intermediate molded body in the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 1a Dowel pin 1b Flat plate part 2 Tooth block 3 Groove 4 Intermediate molded object B Workbench b Insert hole

Claims (2)

[Claims] 1. A tooth block is fixed to an upper surface of a substrate on which a plurality of dowel pins adjacent to each other project from a lower surface,
A working model for preparing a dental prosthesis made from an intermediate molded body obtained by cutting a predetermined portion of the tooth block together with a substrate. 2. The working model for preparing a dental prosthesis according to claim 1, wherein a concave portion is formed on an upper surface of the substrate, into which a fixing agent between the substrate and the tooth block can flow.