JPS62233157A - Formation of temporary crown - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for making a temporary crown, which is a temporary crown that is temporarily attached to an abutment tooth that has been ground down from an affected tooth in dental treatment.

[Prior Art] In order to treat a diseased tooth in dental treatment, the so-called diseased tooth is usually ground down to some extent to form an abutment tooth.
A permanent restoration such as a crown or bridge is attached to this abutment tooth.

However, since it takes some time to make a permanent restoration, a temporary crown is placed on the abutment tooth during that time. The purpose of this temporary crown is to protect the dentin exposed during the preparation of the abutment tooth, protect the pulp from external stimuli, and restore occlusion and aesthetics.

The following methods are available for creating this temporary crown.

(+) An impression of the affected tooth is taken in advance using an impression material, and then the lower tooth is ground down to form the abutment tooth. Next, the impression part of the affected tooth of the impression material is filled with instant polymerization resin (hereinafter simply referred to as resin) in a softened state, and this impression is shown on the affected tooth to restore the impression state and harden the resin. , A temporary crown pattern is obtained using this resin. This resin pattern is then cut into a shape similar to the original affected tooth to form a temporary crown. The resin used in this case is generally a mixture of a powder that is a polymer of polymethyl methacrylate and a liquid that is a monomer.

(2) Take an impression of the abutment tooth with an impression material, fill this area with plaster and allow it to harden to make a model of the abutment tooth, and then apply softened resin directly onto this model by hand, and after the resin hardens, The crown is then cut into the same shape as the affected tooth to create a temporary crown.

(3) Apply the resin directly to the patient's abutment tooth by hand in the same manner as above, and after the resin hardens, remove the resin from the abutment tooth and cut it into the same shape as a small tooth to create a temporary crown. shall be.

[Problems to be Solved by the Invention] By the way, in the above-mentioned conventional method for creating a temporary crown, method (1) requires the use of an impression material each time, and this impression material is relatively expensive and cost-effective. There is a problem that it takes

In addition, in method (2), after taking an impression of the abutment tooth, this area must be filled with plaster to create a model, which further increases costs as plaster is required in addition to the impression material. It takes a lot of time and labor. In addition, since the resin is applied directly to the abutment tooth of the model by hand, the resin becomes thicker than necessary and the surface becomes uneven, resulting in a rough shape. Creating a similar shape takes a lot of time and requires a lot of skill, and there is also the problem that the amount of resin used is wasted.

Furthermore, in the method (3), since the resin is applied directly by hand as described above, it similarly requires time and skill, and there is a problem that the amount of resin used is wasted.

[Means for Solving the Problems] The present invention was made to solve the above problems, and uses a ready-made complete model that is slightly larger in size than the affected tooth on which the abutment tooth is to be formed. A flexible thin covering material is pressed onto the part of the model corresponding to the affected tooth,
A formwork material is formed by adhering wax to this material, and after removing this formwork material from the model and removing the coating material, the inside of the formwork material is filled with a softened instant polymerization resin, and this formwork material is is placed on the abutment tooth to harden the instant polymerization resin, thereby obtaining the pattern of the affected tooth.

[Example 1] An example of the present invention will be described below with reference to FIGS. 1 to 9.

FIG. 6 shows the actual treatment site of a patient's tooth, and the tooth indicated by the reference numeral 1 in the center of the tooth row is the abutment tooth. This abutment tooth I is obtained by cutting a diseased tooth 2 shown by a dashed line, and a temporary crown is attached to this abutment tooth 1.

What is indicated by the reference numeral 3 in FIG. 1 is a ready-made complete model of the portion corresponding to the treatment area shown in FIG. 6. The size of this model 3 is slightly larger than that of the actual patient, and the model tooth 4 in the center of the figure is the same tooth as the affected tooth 2.

In this embodiment, such a model 3 is used to create a temporary crown to be mounted as shown in FIG.

(1) First, as shown in FIG. 2, a flexible thin covering material 7, such as Tissico paper, is applied to the model tooth 4 corresponding to the affected tooth 2 of the model 3 and the model teeth 5 and 6 on both sides thereof. The covering material 7 is pressed against the occlusal surface, lingual surface, and buccal surface of each model tooth 4.5.6 so that the surface shape thereof appears on the covering material 7.

This can be easily done by moistening the covering material 7 appropriately.

(2) As shown in FIGS. 3 and 4, wax 8 is placed on top of coating material 7 so as to be in close contact with it. This wax 8
is like wax, and to apply it, use a so-called wax spatula shaped like a spoon, heat this wax spatula, melt the hardened wax 8, and scrape it onto the coating material 7. There are also ways to pile it on top.

(3) Once the wax 8 has hardened, remove it from the model 3. At this time, the covering material 7 is in close contact with the inner surface of the wax 8, and the wax 8 with the covering material 7 in close contact is used as a formwork material 9.

(4) Instantly polymerized resin 1 in a softened state is applied to the recesses impressed by the model teeth 4 inside the form material 9, as shown in FIG.
Fill with appropriate amount of 0.

(5) A mold material 9 is attached to the patient's tooth shown in FIG. 6 by aligning the abutment tooth l with the portion filled with the resin 10, as shown in FIG.

(6) Once the resin IO has hardened, remove the mold material 9 together with the resin 10, and further separate the resin IO and the mold material 9 to obtain a pattern of the resin 10. At this time, resin 10
Since the covering material 7 and the covering material 7 have a property of not adhering to each other, they can be easily separated. The pattern of the obtained resin 10 is the same as the model tooth 4.

After this, the resin lO is cut off from the bottom of the form material 9 or cut to match the pattern of the actual affected tooth 2 to form a temporary crown 11 as shown in FIG.
get.

According to the method for creating a temporary crown using the steps described above, the pattern of the resin 10 obtained by the model M4 is only slightly larger than the affected tooth 2, and there is no major difference in its shape, so cutting the resin 10 is necessary. Only a small amount is required. This means that the amount of resin 10 used can be covered by the minimum necessary reduction. In addition, the only tools used for the preparation are wax 8 and a covering material 7 such as tissue paper, which is easy to use, and has the effect of being simple and short in working time.

[Effects of the Invention] As explained above, according to the present invention, a temporary crown can be obtained without using impression materials or plaster as in the past, and with almost the minimum amount of instant polymerization resin used. This has the effect of reducing manufacturing costs, and since the tools used are simple, such as wax and coating material, the work is not labor intensive and the work time can be shortened.

[Brief explanation of drawings]

Figures 1 to 9 are diagrams showing an embodiment of the present invention, in which Figure 1 is a perspective view showing a part of a ready-made complete model, and Figure 2 is a view showing a part of the model in which a covering material is pressure-bonded. Perspective view of condition, 3rd
The figure is a perspective view showing the state shown in Fig. 2 with wax not adhered to it, and Fig. 4 is a sectional view taken along the line ■-■ in Fig. 3.
Figure 5 is a cross-sectional view of the mold material filled with instant polymerization resin, Figure 6 is a perspective view of the patient's treatment area, and Figure 7 is the area shown in Figure 6 filled with instant polymerization resin. FIG. 8 is a sectional view taken along the line ■--■ in FIG. 7, and FIG. 9 is a perspective view of the temporary crown obtained by this method. 1... Abutment tooth, 2... Affected tooth, 3...
... Model, 7 ... Covering material, 8 ... Wax, 9 ... Formwork material, 10 ... Immediately polymerized resin.

Claims (1)

[Claims] Using a ready-made, fully formed model that is slightly larger than the affected tooth on which the abutment tooth will be formed, a thin, flexible covering material is pressed onto the part of the model that corresponds to the affected tooth, and wax is applied on top of this. are brought into close contact to form a formwork material, this formwork material is removed from the model, the interior of the formwork material is filled with a softened instant polymerization resin, and this formwork material is placed over the abutment teeth to form an instant polymerization resin. A method for making a temporary crown, characterized in that the pattern of the affected tooth is obtained by curing the tooth.