Dental alloys
AssigneeJeneric/Pentron Incorporated
InventorsArun Prasad, Martin L. Schulman, Grant P. Day
Life of this patent
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Abstract
Dental alloys are provided having a coefficient of thermal expansion in the range from about 8 to about 18×10−6/° C. in the temperature range of 25-500° C. and melting temperatures above about 800° C. but below about 1500° C. The alloys contain gold in combination with a small amount of chromium and/or tantalum. Other elements may also be included with the gold and chromium and/or tantalum to provide the necessary forming, melting, and mechanical properties required to manufacture the desired dental restoration.
Claims12
A dental alloy for the manufacture of a dental substrate for a dental restoration comprising by weight:
- about 25 to about 60% Au;
- about 5 to about 20% of one of Cr, Ta, or a combination thereof
- about 10 to about 50% Co;
- and
- about 5 to about 30% of one of Ni, Pd, Cu or a combination thereof.
A dental alloy for the manufacture of a dental substrate for a dental restoration comprising:
- about 30 to about 50% Au;
- about 10 to about 15% of one of Cr, Ta, or a combination thereof;
- about 20 to about 30% Co;
- and
- about 10 to about 20% of one of Ni, Pd, Cu, Mn, or a combination thereof.
Dependencies are inferred from the claim text.