Amalgam-glass ionomer bonding system
US5252121A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Apr 23, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K6/889
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Metal bases, metal salts and/or metal oxides are added to an amalgam restoration formula for use in conjunction with a glass ionomer cement to restore a tooth lesion. The additive is comprised of an amount of metal bases, metal salts and/or metal oxides, such as the powder of a polycarboxylate dental cement, sufficient to improve the bond strength between wet glass ionomer cement applied to the tooth lesion and the wet improved amalgam applied to the wet cement. As a result, the retentive quality of such a restoration is improved and therefore may permit a lesion to be filled with amalgam rather than requiring extraction or the application of a prosthesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.