C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/11, 261/20,
C04B 35/44 (2006.01) A61C 13/083 (2006.01) A61K 6/06 (2006.01) A61K 6/093 (2006.01) C04B 35/111 (2006.01) C04B 35/63 (2006.01)
Patent
CA 1146980
Abstract This invention relates to dental appliances such as tooth crowns or bridges made from a particular ceramic material. There is disclosed a hard, strong ceramic body and a ceramic raw batch and method for manufacture whereby the body, after being formed of the raw batch in the shape and size desired, can then be fired to monolithic structure without any shrinkage or distortion during the filling operation. The raw batch contains aluminum oxide, magnesium oxide, glass frit and a silicone resin, these constituents being present in a ratio such that after the firing operation the resulting and the remainder interstitial glass, the crystalline material consisting predominatly of magnesium aluminate spinel and alumina. The ceramic and method are used to make novel dental crowns and other dental appliances where a precise fit along with high strength and wear resistance are desirable.
366144
Starling Lynn B.
Stephan James E.
Stroud Robert D.
Coors Porcelain Company
Riley Edwin J.
Smart & Biggar
Sozio Ralph B.
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