JPH04266754A - Manufacture of bottomed denture - Google Patents

Abstract

PURPOSE:To manufacture a bottomed denture polymerized from the mucous membrane face side of a gypsum pattern uniformly and homogeneously and having sufficiently high precision. CONSTITUTION:Flasks 1, 3 buried with wax dentures and de-waxed are heated at the required temperature in advance, rice cake-shaped resin is filled into them, and they are polymerized.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing dentures.

[0002] For dentures, the precision of the surface that contacts the oral mucosa is important. When the glutinous resin polymerizes, it undergoes polymerization shrinkage, which improves the accuracy of the location where polymerization has started. Therefore, polymerization of the sticky resin preferably proceeds from the mucosal surface side of the plaster model replicating the oral mucosa.

0003

BACKGROUND OF THE INVENTION Hitherto, no manufacturing method has been developed that allows the production of dentures with sufficiently high precision on the surface that contacts the oral mucosa.

[0004] Conventionally, the method for manufacturing dentures has been called wet heat polymerization, in which a waxy denture is implanted and a waxy resin is inserted into a plaster mold of a dewaxed flask, and then the resin is immersed in hot water and heated. There is a method called dry heat polymerization, in which the flask is heated between hot plates.

[0005] In these conventional methods, since the sticky resin is heated after being filled into the plaster mold, the initiation of polymerization differs depending on the location. When the glutinous resin is filled and heated, the inside of the flask is heated by heat conduction. The shape of the bed is complex and varies from person to person, and the temperature at which polymerization begins is reached irregularly in different parts. The accuracy of the site where polymerization has started is improved, but the accuracy of the site where polymerization is delayed is poor. Thus, depending on the above-mentioned conventional method, the resulting denture does not necessarily have good precision on the surface that contacts the oral mucosa.

[0006] Conventionally, after a wax denture has been implanted and removed, a flask is filled with sticky resin, and then heated from the side of the flask that is closer to the plaster model, so that the sticky resin advances from the mucous surface side of the plaster model. (referred to as one-sided polymerization)
This is also being done. However, even with this method, for the same reason as the conventional method mentioned above, the initiation of polymerization differs depending on the site, and the temperature at which polymerization starts also differs depending on the site, and the oral mucosa of the resulting denture The accuracy of the surface in contact with the surface cannot necessarily be said to be sufficiently high.

[0007]

The problem to be solved by the invention is to develop a method for manufacturing dentures with sufficiently high precision, which is uniformly heated and polymerized from the mucosal side of the plaster model.

[0008]

[Means for Solving the Problems] In order to solve the above problems, the method for manufacturing a denture with a base of the present invention includes heating the flask after the implantation and dewaxing of the wax denture to a temperature necessary for polymerization of the resin in the form of a waxy denture. It is characterized by filling this with a sticky resin and polymerizing it.

[0009] As a method of heating the flask to a required temperature, a specification in which the flask is placed in a constant temperature bath and heated can be advantageously applied.

0010

[Operation] By using the above manufacturing method according to the present invention,
It was seen that the desired problem was resolved.

[0011] When a flask is preheated to a required temperature and filled with a sticky resin, the sticky resin is uniformly heated from the mucous membrane side of the plaster model of the flask. Therefore, the mucosal surface of the resin bed has sufficiently high precision, which is even better than conventional single-sided polymerization using wet heat polymerization or dry heat polymerization.

[0012] The accuracy of the mucosal surface of the resin bed is determined by keeping the flask on the plaster model side at a higher temperature than the temperature required for polymerization of the resin, and keeping the flask on the artificial tooth side at a lower temperature than the flask on the plaster model side. When left in place, the sticky resin is more accurately heated and polymerized from the mucosal surface side of the plaster model, and the precision of the mucosal surface of the denture base is further improved. When this specification is adopted, it is preferable to proceed with polymerization by placing the flasks so that the flask on the plaster model side is at the bottom and the flask on the artificial tooth side is at the top. According to this, it was recognized that polymerization of the sticky resin from the mucosal surface side was more effectively achieved.

In the method of the present invention, once the sticky resin is filled into the flask, the resin in the vicinity of the flask inlet is almost immediately cured at the temperature of the flask, which has been previously heated, and closes the flask inlet. Therefore, a highly accurate resin base denture can be obtained without the need to add a resin backflow prevention device to the injection port.

[0014]

Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of the flask separated into the plaster model side and the artificial tooth side, FIG. 2 is a cross-sectional view of the flask during injection of the sticky resin, and FIG. 3 is a cross-sectional view of the flask during the polymerization process of the sticky resin.

Reference numeral 1 is the flask on the plaster model side, 2 is the mucous membrane surface of the plaster model 5 of the flask 1, and 3 is the flask on the artificial tooth side. is shown. These flasks 1 and 3 have completed the implantation and dewaxing of wax dentures, flask 3 has an artificial tooth 4 embedded in plaster 5', and flask 1
It has an injection port 6 for the sticky resin. The configurations of these flasks 1 and 3 are the same as before.

[0016] The flasks 1 and 3 are heated in advance to a temperature necessary for polymerizing the sticky resin by an appropriate method such as using a constant temperature bath. Preferably, the flask 1 on the side of the plaster model
higher temperatures at those required for polymerization of the sticky resin;
For example, at 120°C, flask 3 on the artificial tooth side is heated to flask 1.
Keep the temperature lower, for example 70°C.

Flask 1 heated to this required temperature
, 3 are closed and set, a glutinous resin 7 is press-fitted into the flask through the injection port 6. After press-fitting the sticky resin 7, place the flasks 1 and 3 together with the flask 1 on the plaster model side down and the flask 3 on the artificial tooth side up, and leave it in that state. polymerize.

[0018] In this way, a denture can be obtained which has a resin bed of sufficiently high precision in which the surface in contact with the oral mucosa is uniformly polymerized. After the polymerization of the glutinous resin is completed, it may be indexed and polished according to conventional methods.

[0019]

[Effects of the Invention] As is clear from the above explanation, according to the present invention, it is possible to manufacture dentures with sufficiently high precision by uniformly polymerizing from the mucous surface side of the plaster model. brought about.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a flask separated into a plaster model side and an artificial tooth side.

FIG. 2 shows a cross-sectional view of the flask during injection of sticky resin.

FIG. 3 is a cross-sectional view of a flask in a glutinous resin polymerization process.

[Explanation of symbols]

1 Flask on the side of the plaster model 2 Mucosal surface of plaster model 3 Flask on the artificial tooth side 4. Artificial teeth 5 Gypsum model 6 Inlet 7 Mochi-shaped resin

Claims (3)

[Claims] [Claim 1] A flask that has undergone wax denture implantation and dewaxing is heated in advance to a temperature necessary for polymerizing the sticky resin, and is then filled with the sticky resin and polymerized. Manufacturing method for fixed dentures. 2. Heat the flask on the side of the plaster model replicating the mucosal surface to a higher temperature necessary for polymerization of the resin, and heat the flask on the side of the artificial tooth to a lower temperature than the flask on the side of the plaster model. 2. The method for manufacturing a denture according to claim 1, wherein the denture is preset. [Claim 3] A flask filled with sticky resin,
3. The method of manufacturing a denture according to claim 2, wherein the polymerization of the sticky resin is proceeded with the flask on the plaster model side facing downward and the flask facing the artificial tooth facing upward.