The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 1992
Filed:
Dec. 18, 1989
G-C Toshi Kogyo Corporation, Kasugai, JP;
Abstract
An artificial tooth comprised of an enamel segment, a composite material of a resin matrix composed mainly of a polymerizable compound with a urethane bond and at least two ethylenically unsaturated double bonds, optionally with a polymerizable compound with at least two ethylenically unsaturated double bonds; and a dentinal segment, a composite material of polymethylmethacrylate, methylmethacrylate, one or more of a polymerizable compound with a urethane bond and at least two ethylenically unsaturated double bonds, one or more of a polymerizable compound with at least two ethylenically unsaturated double bonds, one or more of a polymerizable compound with a phenyl group and at least two ethylenically unsaturated double bonds, and one or more of a polymerizable compound with a urethane bond, a phenyl group, and at least two ethylenically unsaturated double bonds. For the preparation of the artificial tooth, the dentinal segment is first incompletely polymerized without the enamel segment, and the enamel segment is then completely polymerized simultaneously with complete polymerization of the dentinal segment.