Good aesthetic artificial dental materials by calcium phosphate glass-ceramic
US4626514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/833
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Dental materials using calcium phosphate glass-ceramics and having the color tone with high approximation to that of natural teeth. In those dental materials, calcium phosphate composite, nickel oxide and one or more other type of compounds selected from oxides of iron, manganese, cerium, titanium and tungsten, are contained as coloring component. Also, if necessary, Al.sub.2 O.sub.3 and/or SiO.sub.2 is contained as a color assisting agent in that composite. The calcium phosphate glass-ceramic according to this invention consists of the same components as that of natural teeth. Besides, it is possible to adjust the color tone delicately to match with the color tone of each individual`s teeth. Moreover, the coloring components are incorporated in crystals of calcium phosphate. Consequently, they cause no elution during use and are therefore ideal as dental material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.