Dental procelain bond layer for titanium and titanium alloy copings
AssigneeAmerican Thermocraft Corporation Subsidiary of Jeneric/Pentron Incorporated
InventorsCarlino Panzera, Arun Prasad
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Abstract
Porcelain compositions suitable for layers on metal base dental restorations have fusion temperatures of about 800.degree. C. and lower. The compositions may be employed as coatings on titanium and titanium alloy bases since the compositions have thermal expansion values close to those of titanium and its alloys. A bond layer is also provided to improve bonding between the porcelain layers and the restoration base. A method is also provided for forming dental restorations with relatively inexpensive and biocompatible metal bases and low fusing dental porcelains.
Claims9
A dental restoration comprising a titanium or titanium alloy coping, a bond layer applied to said coping, and a body porcelain composition applied to said bond layer, wherein said bond layer comprises from about 10 to about 75 percent by weight titanium dioxide, from about 5 to about 20 percent by weight boron oxide and from about 5 to about 20 percent by weight silicon dioxide, and wherein said body porcelain composition comprising 50-70 percent by weight silicon dioxide and 7-33 percent by weight boron oxide.
Dependencies are inferred from the claim text.