Dental prosthesis
AssigneeOlympus Optical Co., Ltd.
InventorYasuharu Hakamatsuka
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Abstract
A wax pattern is built up on the surface of the other end of a post comprising pure titanium. The wax pattern is used to produce a casting mold. While the casting mold is kept at a predetermined temperature, a crystallized glass having a thermal expansion coefficient falling within the range of .+-.5.times.10.sup.-7 with respect to that of pure titanium is melted and cast in the mold. The resultant mold product is heated and crystallized to obtain a dental prosthesis. A post comprising pure titanium is chemically bonded to a core comprising the crystallized glass. This invention provides a dental prosthesis which is easy to manufacture and nontoxic to the human body.
Claims11
A dental prosthesis comprising:
- a substrate body comprising titanium;
- and
- a molding body comprising a crystallized glass which is molded on a part of the substrate body to form a shape corresponding to at least a crown of a tooth, said crystallized glass having a thermal expansion coefficient of .+-.5.times.10.sup.-7 with respect to the titanium,
- wherein the molding body is chemically bonded to the substrate body.
A dental prosthesis comprising:
- a substrate body comprising titanium which is pure titanium whose surface is coated with a material selected from the group consisting of titanium carbonitrate and titanium oxide;
- and
- a molding body comprising a crystallized glass which is molded on a part of the substrate body to form a shape corresponding to at least a crown of a tooth, said crystallized glass having a thermal expansion coefficient of .+-.5.times.10.sup.-7 with respect to the titanium,
- wherein the molding body is chemically bonded to the substrate body.
Dependencies are inferred from the claim text.