Low-fusing temperature porcelain, compositions, prostheses, meth

Details Low-fusing temperature porcelain, compositions, prostheses, meth Low-fusing temperature porcelain, compositions, prostheses, meth

1996-06-10

1998-02-03

Bonner, Melissa

Compositions: coating or plastic

Coating or plastic compositions

Dental

501 64, 501 66, 501 67, 501 70, 501 72, 433223, 4332721, 433167, 4332121, 433208, C03C 3091

Patent

active

057139946

ABSTRACT:
A low-fusing temperature porcelain compositions, methods of use thereof on metal or porcelain substrates to form dental prostheses and kits therefor. Compositions of the invention have a fusing temperature of less than 800.degree. C. and a coefficient of thermal expansion compatible with a substrate of metal or ceramic. Each composition includes, in weight percent of the composition, from 40 to 65 percent by weight SiO.sub.2, from 6 to 12 percent by weight Al.sub.2 O.sub.3, from 6 to 12 percent by weight Na.sub.2 O, from 5.5 to 10.50 percent by weight K.sub.2 O, from 1 to 3 percent by weight Li.sub.2 O, from 0.8 to 2.5 percent by weight CaO, from 0.8 to 4.0 percent by weight B.sub.2 O.sub.3 and from 0.1 to 0.8 percent by weight CeO.sub.2.

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John W. McLean; Dental Ceramics, Proceedings of the First International Symposium on Ceramics; 1983; pp. 516 and 517.

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