Dental restorative compositions of improved X-ray opacity
US4220582A · kind A · utility
30Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1979 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Jan 3, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/887
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Dental restorative compositions of improved X-ray opacity are described. These compositions comprise from 30% to 85% by weight of the composition of a finely divided inorganic filler and from 15% to 70% by weight of the composition of a liquid resin binder. The filler comprises at least 60% by weight of the filler of a ground barium glass that has a barium oxide (BaO) content greater than about 22.5% by weight of the glass. By appropriate selection of the binder, the composition may cure in a single stage of curing, or it may set in two stages, to provide a period of time during which it can be carved to a desired shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.