Compositions: coating or plastic – Coating or plastic compositions – Dental
Patent
1975-06-10
1977-08-09
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Dental
106 45, 32 8, 32 15, A61C 1308, C09K 300
Patent
active
040408442
ABSTRACT:
A porcelain tooth structure and method of making the same in which a powder-form porcelain is mixed with an adhesive, in an amount suffficient to form a coherent mass of the porcelain, to form a workable paste, the paste is formed into a tooth structure having the general shape of a desired, finished tooth, preferably by molding in a metal, plastic or rubber mold, the molded tooth is dried, generally at a temperature between ambient temperature and about 600.degree. F and the adhesive in at least a part of the tooth structure is rendered water-resistant by utilizing an inherently water-resistant adhesive or treating a water-soluble adhesive with an agent which renders the adhesive water-resistant, such as a solvent, a hardening agent for the adhesive, a water-immiscible oil or another agent which combines with the adhesive by chemical reaction, physico-chemical reaction or physical action, either during the mixing of the porcelain and adhesive or after the drying of the tooth structure. The tooth structure may thereafter be semi-baked at a temperature sufficient to form a concretious tooth structure, generally above about 1200.degree. F, but below the vitrification temperature of the procelain.
REFERENCES:
patent: 2443318 (1948-06-01), Lee et al.
patent: 2652338 (1953-09-01), Greger
patent: 3400097 (1968-09-01), Weinstein
patent: 3621576 (1971-11-01), Gnecco
patent: 3766650 (1973-10-01), Gnecco
patent: 3880662 (1975-04-01), Daskalon
Restorative Dental Materials, Peyton et al., p. 528, 1971.
Bryan James E.
Morris Theodore
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