Dental restorations
US6291378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C4/185
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention provides a refractory material for use in the manufacture of dental restorations, the refractory material comprising essentially of an admixture of Silica, Silicon Carbide, Magnesium Oxide, Mono Ammonium Phosphate, and Zircon or Aluminium Oxide in predetermined proportions by weight. The material is formed as an homogenous powder and mixed with a colloidal silica based solution to form a creamy mixture suitable for casting into a silicone based impression of a prepared tooth so as to form a refractory model of said tooth. The homogenous powder may be stored in moisture resistant material until required to be mixed with said colloidal silica based solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.