Dental prostheses
US5064731A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Mar 21, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dental prosthesis comprises an inner layer portion and an outer layer portion. The outer layer portion is a dental porcelain material, while the inner layer portion is a sintered product which, after sintering, is composed of: (i) 40 to 95% by weight of one or (two or) more electric conductive ceramic materials selected from the group consisting of nitride ceramics, boride ceramics and carbide ceramics, all having a specific electric resistance of 10.sup.-1 .OMEGA..multidot.cm or below, and (ii) 5 to 60% by weight of the following (A) and/or (B): PA1 (A) a dental porcelain material, and PA1 (B) one or (two or) more metals selected from the group consisting of Ti, Zr, Au, Pt, Pd, Ag, In and Sn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.