Photochromic dental material
US5698020A · kind A · utility
14Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | May 16, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/889
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to dental materials which contain a photochromic material such as for example a photochromic dye, a photochromic glass, a photochromic ceramic and/or a photochromic glass ceramic and which can be visually distinguished from natural tooth material after irradiating with light, but which assume their original colour again after a certain period has expired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.