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Title: Gold color copper alloy for restorative dentistry
Claims: What is claimed is: 1. A gold color dental restoration formed of a copper alloy consisting essentially by weight of 48-52% of copper, 47-51% of zinc and 0.1-1.0% of zirconium, said dental restoration being chemically stable against discoloration and dissolution in the mouth in which it is applied. 2. The gold color dental restoration according to claim 1 and also containing nickel in an amount less than 1.2% by weight. 3. The gold color dental restoration according to claim 1 and also containing nickel in an amount of less than 1.2% by weight and indium in an amount of less than 1.0% by weight. 4. The gold color dental restoration according to claim 1 and also containing nickel in an amount of less than 1.2% by weight, indium in an amount of less than 1.0% by weight and silicon in an amount of less than 1.0% by weight. 5. The gold color dental restoration according to claim 1 and also containing nickel in an amount of less than 1.2% by weight, indium in an amount ofless than 1.0% by weight, silicon in an amount of less than 1.0% by weight and beryllium in an amount of less than 0.5% by weight. 6. The gold color dental restoration according to claim 1 and also containing nickel in an amount of less than 1.2% by weight, indium in an amount of less than 1.0% by weight, silicon in an amount of less than 1.0% by weight and lithium in an amount of less than 0.5% by weight. 7. The gold color dental restoration according to claim 5 and also containing lithium in an amount of less than 0.5% by weight. Other info: Inventors: Hayashi, Osamu Application Number: 704553 Filing Date: 1976-07-12 Publication_date: 1978-06-13 Assignee: Primary Class(es): 420/477 420/521, 420/587, 433/226 Other Classes: US Patent Ref:
Other Refs:
Primary Examiner: Lovell, C. Assistant Examiner: Attorney: Steinberg & Blake |
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