Fiber filled dental porcelain
US4793809A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | May 21, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/822
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Improved dental porcelain compositions and resultant fused porcelain dental restorations are provided which exhibit enhanced strength properties as compared with conventional porcelains. The fiber-filled porcelain compositions of the invention are supplemented with zirconium oxide ceramic fibers in relatively minor amounts of less than 5% by weight. The reinforcing fibers are advantageously predominantly zirconium oxide, and have a relatively short average length of from about 1/32 to 1/4 of an inch. These fibers are normally randomly oriented and homogeneously dispersed throughout the fiber-filled porcelain composition, in order to give a reinforcing fiber network. A completed restoration in accordance with the invention would typically include a core portion formed of the fiber filled porcelain, with the outer portion of the restoration being fabricated from conventional non-fiber reinforced porcelain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.