Dental alloys with reduced gold content

Details Dental alloys with reduced gold content Dental alloys with reduced gold content

C - Chemistry, Metallurgy

22

C

75/28

C22C 5/00 (2006.01) A61K 6/04 (2006.01) C22C 5/04 (2006.01)

Patent

CA 1240178

ABSTRACT OF THE DISCLOSURE Dental alloys having a reduced gold content, particu- larly for burning on dental porcelains, must be easy to handle, and must not result in discolorations and bubble formation when being burned on. They must have a physiologically acceptable hardness and a low melting interval. Alloys containing 20 to 35% by weight of gold and 45 to 65% by weight of palladium have these properties when they additionally contain: a) 6 to 15% by weight of copper and 0 to 10% by weight of nickel, b) 0 to 12% by weight of indium and 0 to 12% by weight of tin and 0 to 4% by weight of gallium while the sum of the contents of indium added to two and one half times the gallium content must result in a value of between 5 and 15% by weight, c) 0.1 to 1% by weight of iridium and/or rhenium and/or ruthenium and d) selectively also 0 to 1% of aluminium, 0 to 1% of tantalum, 0 to 1% by weight of ti- tanium and/or 0 to 5% by weight of silver.

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