Patent ID: 7329125

Claim:
A method to improve the retention of a gold based metal coping composed substantially or essentially of gold when cemented to a tooth structure in the preparation of a crown or bridge comprising the steps of: (1) forming a liquid composition comprising high and low fusing temperature metal particles with the high fusing temperature metal particles representing less than 25% by volume of the composition and with at least 50% of the high fusing temperature particles having a thin cross-sectional average thickness of less than 5 microns, (2) coating the interior surfaces of said gold based metal coping with said liquid composition to form a thin coating on the interior surface of the coping having a thickness of no greater than 20 microns, and (3) heat treating the coating of liquid composition at a temperature of between 750° C. and 1050° C. to permit the low-fusing temperature metal particles to fuse but not entirely melt so as to facilitate mounting the gold based metal coping on said tooth structure after applying a dental cement between the gold based metal coping and the tooth structure for improving the retention of the gold based metal coping to the tooth structure.