Dental crowns and bridges from semi-thermoplastic molding compositions having heat-stable custom shape memory
US5403188A · kind A · utility
Inventors
Key dates
| Filing date | Oct 15, 1993 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Oct 15, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/92
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Dental crowns and bridges are made from thermoplastic molding compositions which are a mixture of thermoplastic material (for example, polycaprolactone), a free-radically polymerizable resin (for example, a urethane diacrylate oligomer), and free-radical initiator (for example, a visible-light cure photoinitiator). The mixture is solid at 38.degree. C., has a melting or softening point that comfortably can be withstood by oral tissues, and can be imprinted with a heat-stable custom shape memory and semi-thermoplastic properties by shaping the composition to a desired shape and then causing or permitting the resin to undergo polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.