Dental restoration combining dental porcelain and improved white

Details Dental restoration combining dental porcelain and improved white Dental restoration combining dental porcelain and improved white

1974-06-26

1976-06-08

Peshock, Robert

A61C 1300

Patent

active

039614204

ABSTRACT:
A white gold alloy consisting essentially of 50-54% gold, 27-31% palladium, 11-16% silver, about 0.05-0.25% of iridium or ruthenium, and 4.5-8% of indium and tin, provided there is at least 2% indium, no more than 4.5% tin, and further provided that if there is less than about 6% indium, the alloy must contain at least 0.25% tin. The alloy meets or at least narrowly approaches the ADA Spec. No. 5 for Type IV dental casting gold alloys, and is useful for dental appliances and for the fusing of porcelain thereto for dental restorations.

REFERENCES:
patent: 2143217 (1939-10-01), Truthe
patent: 3052982 (1962-09-01), Weinstein et al.
patent: 3667936 (1967-06-01), Katz

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