Artificial teeth and method for making them
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United States of America Patent
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Jul 7, 1992
Grant Date -
N/A
app pub date -
Dec 18, 1989
filing date -
Dec 28, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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