Dental alloy for use in the adhesion of porcelain

Details Dental alloy for use in the adhesion of porcelain Dental alloy for use in the adhesion of porcelain

1977-08-05

1978-11-07

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C22C 502

Patent

active

041243820

ABSTRACT:
The present invention provides a precious metal alloy consisting essentially of palladium and up to 25% tin, up to 2% iron, up to 1% aluminium, and up to 11/2% boron. In its preferred form the tin content is approximately 15%, the iron content is approximately 0.83%, the aluminum content is approximately 0.5%, and the boron content is approximately 0.17%. The alloy has a melting point of approximately 2650.degree. F. It is especially adapted for low-fusing porcelain application, and well suited for dental use. It is an economy precious metal alloy as it contains no gold and no platinum. Between 1% and 5% of ruthenium may be added as a hardening element. 3% of ruthenium has been found to be ideal.

REFERENCES:
patent: 1797236 (1931-03-01), Klausmann et al.
patent: 3052982 (1962-09-01), Weinstein et al.
patent: 3961420 (1976-06-01), Tuccillo

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