Composite dental material and method of preparing same
US4028325A · kind A · utility
Inventors
Key dates
| Filing date | Mar 7, 1975 |
| Grant date | Jun 7, 1977 |
| Priority date | — |
| Expiry date | Mar 7, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/887
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A composite material and method of preparing same for use in prosthetic dentistry. The composition includes silica glass containing between about 8.0-30% on a weight basis of alkaline earth metal oxides and/or alkali metal oxides in solution selected from the group consisting of calcium oxide, magnesium oxide, sodium oxide, potassium, and lithium oxide. In one form of the invention, a methacrylate resin is coupled to the silica glass by a silane mixture. The invention includes the method of forming the composite material through both a cold curing system and a heat cured system into a composite veneering and tooth material which is useful in forming crowns and other dental restorations as well as artificial teeth requiring aesthetic appearance of normal dentition. The finally formed dental material shows a high hardness factor in combination with a high wear resistance. The composite material has the capability of being highly polishable and provides for low toxicity as well as a low index which allows optical matching of the composite material to naturally formed teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.