Dental amalgams

Details Dental amalgams Dental amalgams

C - Chemistry, Metallurgy

22

C

75/1, 6/36

C22C 1/04 (2006.01) A61K 6/05 (2006.01) C22C 5/06 (2006.01)

Patent

CA 1054398

ABSTRACT OF THE DISCLOSURE An improved composition is adapted for amalgamation with mercury to form a dental amalgam and comprises a substantially uniform blend of a major proportion (preferably 55 to 90% by weight of a first alloy and a minor proportion by weight (preferably 10 to 45% by weight of a second alloy. The first alloy is in the form of spheroidal particles having a particle size distribution in the range of about 40 to 70% by weight silver, about 10% to 30% by weight tin, and about 20% to 40% by weight copper. The second alloy is in the form of irregularly-shaped particles having a particle size distribution in the range of about 1 to 100 microns and consists essentially of about 55% to 75% by weight silver, about 20% to 40% by weight tin, about 0.05% to 10% by weight copper and about 0.1% to 2% by weight zinc.

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