JPH0223955A - Preparation of ceramic coated artificial tooth - Google Patents

Abstract

PURPOSE:To obtain an artificial tooth easy to adjust a hue and having good moldability, toughness, impact resistance and bio-compatibility by coating a matrix metal tooth with a matrix metal.ceramics inclination functional film wherein the ratio of a metal component is linearily reduced from the surface of the matrix metal tooth and applying a ceramics film to said functional film so that an objective hue is obtained at a place where the ratio of the metal component becomes zero. CONSTITUTION:A matrix metal tooth 1 made by a conventional method is coated with a matrix metal.ceramics inclination functional film wherein the ratios of metal and ceramics components are linearily reduced and increased from the surface of the matrix metal tooth 1 and a ceramics film 3 is applied to said film 2 so that an objective hue is obtained at a place where the ratio of the metal component becomes zero. For example, amalgam is used as the matrix metal tooth and, as the matrix metal of the matrix metal ceramics.inclination functional film, amalgam is used and, as the ceramics of said functional film, apatite is used and the ceramics film 3 consists of 95% of apatite and 5% of calcium carbonate.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a technique for manufacturing artificial teeth by a coating method, and particularly to a method for manufacturing a ceramic-coated artificial tooth in which a base metal is coated with a ceramic film of a desired color.

(Prior Art) In conventional artificial teeth, a metal material or a ceramic material was used alone. On the other hand, artificial teeth using metal materials were manufactured by taking a mold of the teeth and pouring amalgam or precious metal gold into the mold. On the other hand, artificial teeth using ceramic materials have been manufactured by press-molding, processing, and firing amorphous apatite or alumina powder.

(Problems to be solved by the invention) However, with this conventional metal material artificial tooth, biocompatibility,
In other words, the affinity between the metal and the gums is poor, making it easy for gaps to form between the metal and the gums, as well as the color being noticeably different from natural teeth.
In addition, it is difficult to create the desired shape with ceramic material artificial teeth.
Difficult to adjust 9 color tones that are vulnerable to heat and mechanical damage 2
Each had drawbacks, such as the color tone changing over time.

Ceramic-coated artificial teeth, in which metal teeth are coated with ceramics, could be considered as a solution to these drawbacks of conventional artificial teeth, but there is currently no suitable method for manufacturing ceramic-coated artificial teeth.
It was highly desired by the world.

(Means for Solving the Problems) The present invention has been made to solve the above problems and is constructed as follows.

That is, this invention coats a base metal tooth with a base metal/ceramic functionally graded film in which the component ratio of metal and ceramic decreases and increases linearly from the base metal tooth surface, and the metal component ratio increases. This is a method for manufacturing a ceramic-coated artificial tooth, which is characterized in that a ceramic film is coated to obtain a desired color tone when the color tone reaches zero.

Next, a method for manufacturing a ceramic-coated artificial tooth of the present invention will be explained with reference to the drawings.

A functionally graded base metal/ceramic film is created in which the proportion of metal and ceramic components in the base metal tooth 1 made by the conventional method decreases and increases linearly from the surface of the base metal tooth 1, as shown in Figure 1. 2 is coated, and when the metal component ratio becomes zero, a ceramic film 3 is coated to obtain the desired color tone.

Example Amalgam is used for the base metal tooth.

An incisor was manufactured using amalgam as the base metal of the base metal/ceramic functionally graded membrane, apatite as the ceramic, and 95% apatite and 5% calcium carbonate as the ceramic membrane.

In clinical trials, there were no problems with discoloration of the incisors, damage, or incompatibility with living organisms.

(Effects of the Invention) According to the manufacturing method of the present invention, the color tone can be easily adjusted because the ceramic composition can be easily controlled, and the color tone changes over time because the coating is dense and nothing penetrates into the artificial tooth. It has an effect that does not change.

Furthermore, since the artificial tooth manufactured by the present invention uses a metal base material, it has excellent moldability and can easily obtain a desired shape, and also has excellent strength and toughness and strong impact resistance. Furthermore, it is densely coated with ceramics and has good biocompatibility.

[Brief explanation of the drawing]

FIG. 1 is a ratio chart of components for carrying out this invention, and FIG. 2 is a structural diagram of an artificial tooth manufactured according to this invention. 1... Base metal tooth, 2... Base metal/ceramic functionally graded film, 3... Ceramic film, 4... Artificial tooth surface, Figure 1 Patent applicant Tokyo Ceramics Co., Ltd. Agent Patent attorney Shi Oya Suwao-12 [J Figure 2 Jo, Yahoo Mix Exhibition

Claims (1)

[Claims] The base metal tooth is coated with a base metal/ceramic functionally graded film in which the component ratio of metal and ceramics decreases and increases linearly from the base metal tooth surface, and when the metal component ratio becomes zero, the target is applied. A method for manufacturing a ceramic-coated artificial tooth, which comprises coating a ceramic film with a color tone of .