JPS6176149A - Production of denture bed - 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 7 for manufacturing a dental denture base. j*, 6'4rF mold as glass fiber λ, ffI reinforced plastic ([I
□、Skin P、-F：Lber Re1nf orced
BlaSties) 'IJJ 7 After placing a legally molded wax denture in the flask using 7 Rasfs,
The present invention relates to a method of manufacturing a denture base by making a female mold of the measuring device using plaster, heating and pouring wax, and then heating and polymerizing the female mold to fill it with non-glue and polymerizing it with a micro-T-pu.

Conventional technology> Conventional methods for manufacturing denture bases using heat-polymerized resins include
The wet heat polymerization method using external heating is often used, but it is inefficient because it takes a long time, 15 to 20 minutes per hour for dough-forming and cake-forming, and 90-100 minutes for curing time. , separability from stone L1 and compatibility of the molded denture base, and the uniformity of the denture after 7 cures.
There was room for improvement in properties and strength.

<Problems to be solved by the invention> This application was invented in view of the above circumstances, and F.
We have newly developed a flask made of R, P, and made a female mold of one stone, which is molded inside the flask! By implanting a J-medium heated polymerized resin and utilizing the internal heating effect of molecular motion excited by microwave irradiation, the resin is polymerized and cured, and the curing time is 3 to 30 minutes. The purpose is to dramatically shorten the time to 5 minutes and increase the productivity of the denture base, while at the same time improving the performance of the denture base.

Means for solving the problem of cracks> The theoretical background of the resin fastening using microwaves is as follows.

Microwave is an electromagnetic wave with a wavelength of 1171 or less that is used for high-frequency heating, etc., and includes submillimeter waves of less than 1 degree, which is in contact with the external light. , MoM, A,)
A polymeric F4 material with polarity such as T is used. When a polar material is placed in a high-frequency electric field, the polarized molecules are excited by the high-frequency energy, and as a result, heat is immediately generated from within the material and the temperature rises uniformly.

The heat generation 471 (P) in the unit volume is expressed by the following equation.

P=0.556(εtanδ) f F2X 10−
"'"JJ'/i However, ε dielectric constant f of Niresin: PR wave number of microwave (C/ s e c
) tan δ: loss coefficient F: electric field strength (V/cm2) In other words, the larger the loss coefficient tan δ of the dielectric constant of the polymer material, the more high frequency energy is converted into heat. Utilizing this phenomenon, by irradiating the acrylic monomer, which is a polar molecule, with microwaves, it is possible to uniformly raise the temperature from the internal jet and proceed with uniform curing.

In order to carry out the microwave polymerization method of the dental polymer material of the present invention, it is necessary to use an electronic resin or the like to generate and irradiate microwaves, and to use a resin that has good microwave permeability and is hard to form. Upon pressure application after implantation, its lf
It has the strength to withstand force, has heat resistance to withstand the temperature rise of the resin due to dielectric loss, is lightweight, can be handled by cm, and has good separation of stones and debris. It is necessary to use F, R, 2M flasks, etc. with

A wax denture manufactured by the Yuwa method is embedded in the flask, a mold is made of plaster, and then placed in an electronic resin or the like and heated and waxed to form a female plaster mold. After adjusting the defoaming, the resin is electrified, placed in a jar, etc., and pulverized with microwaves. After the resin is cured, the resin is pressed into the female mold, and pressure is applied from the top of the flask using a hydraulic press. Curing is performed by polymerization. After cooling, the plaster female mold in which the molded denture base is embedded is taken out from the flask, and the all & floor is separated from the stone 1) using stone/correction scissors or the like.

Effect: The curing time, which used to be 15 to 20 minutes with the external heating method, can be drastically shortened to 30 to 40 seconds.
A uniform material can be obtained.

The curing time has been shortened from 90 to 100 minutes to 3 to 5 minutes, and there is no discoloration or cracking. Curing can be done with almost no interference from the metal, and no air bubbles are generated around the clasp wire.

Historically, since the method of the present application raises the temperature uniformly, it is possible to mold a denture base with extremely good compatibility compared to the wet heat polymerization method. The renones and gypsum have excellent separability, and can be easily separated because the bond strength is about % of that of conventional wet heat polymerization.

Example of implementation Hereinafter, the present invention will be explained in detail by giving examples.

Example 1 Use a flask made of F, R, p, for the stone 0 mold.

Figure 1 shows a partially cutaway flask made of F, R, and P.
If it is a first view. The flask has an upstream ring (1), a middle ring (2
It consists of three removable layers: 1 and lower ring (3), and is fixed with polycarbonate bolts and nuts (4). The upper lid (11) has a stone D over 70 hole (5).

2nd x is a plan view of the flask.

Work process: D After placing 5 pieces of wax An4 adjusted by punching on the base (3), light J and +1 are applied to the stone n.

■ Assemble the middle part (2), fill it with plaster and put on the top cover (
After placing 1) in place, perform NAND tightening while pressing with a hydraulic press. Excess gypsum flows out through the overflow hole (5).

■ After curing with a stone lamp, perform heating and agitation by passing through the stone lamp.

■-a Irradiate the child resin with a micro-wrap for 1 minute at an output of 9QW to turn the resin into a resin.

(2) Inject the molded resin into the aligned female mold and press it.

■ Polymerize by irradiating with microwaves in a reheating and electron processing/no. One minute each is irradiated from the top and bottom of the flask with a high frequency output of 500 'l'/.

■ After cooling, divide the plaster and remove the underlying denture base.

Example 2 A flask having the following characteristics is used.

■ As the fibers, glass fibers are used. ■ As the matrix, Funiwa Holly J-Stel Kyofu is used.

■ As a molding method, S9M, C,, B, M, C,
and using the Handsea method.

■ Port to nara) to ('', polycarbo-free −
g; Use the Iyata molded product on the top.

Using this flask, we filled the denture base with heated polymerized resin by extraction, and irradiated it with microwaves with a high frequency output of 500 Ws and a frequency of 2450 MH2 for 30 to 40 seconds and 3 to 5 minutes for dot formation and cure. and fabricate the denture base.

<Effects of the Invention> By significantly shortening the dot formation time and curing time of the heat-polymerized resin, the productivity of denture bases is greatly improved. Furthermore, the performance of the denture base after molding, such as its suitability and alignment properties, has been praised.

Depending on the manufacturing method of the original denture base, it may take about a week to make and repair the denture base requested by Haiku, or it may take about a few hours depending on the manufacturing method of the original denture base. I can answer. As we approach aging, the need for dentures increases, and this method of manufacturing denture bases is extremely useful as it allows for the modernization of resin denture base manufacturing, which is covered by insurance.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view of the F, R, P, 'IJJ flask, and FIG. 2 is a plan view of FIG. 1. Symbols in the figure: (1)...Top lid, (21...Middle ring, (3)
)...lower ring, (4)...bolt/nut, (5)...
・One hole in the plaster.

Claims (1)

[Claims] 1. A heat-polymerized resin made of polymethyl methacrylate or the like is used as the denture base, a fiber-reinforced plastic flask is used as the plaster mold, and the resin is polymerized using microwaves. Characteristic method for manufacturing denture bases. 2. The fiber-reinforced plastic of the flask uses glass fiber, Kerber aramid fiber, etc. as the fiber, and unsaturated polyester resin, epoxy resin, etc. as the resin. Claim 1
2. Method for manufacturing a denture base as described in Section 1.