Artificial teeth and method for making them
US5127834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/893
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.