Dental prosthesis
US4469477A · kind A · utility
4Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1983 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Mar 24, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C13/0025
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dental prosthesis which has the whole or part of its surface which is in contact with the mucous membrane of the mouth coated with a soft, hydrophilic polyurethane is provided. The polyurethane coating has a thickness of from 0.1 to 3.00 mm when hydrated. The polyurethane is applied to the prosthesis from a non-aqueous solvent in an anhydrous state and is subsequently hydrated by soaking in water. The polyurethane is a reaction product of a mixture of polyether polyols and a di-isocyanate using an alkenediol as a chain extender. The polyurethane contains from 5 to 40% water when hydrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.