Robert M Deluca

US Patent:

57139946, Feb 3, 1998

Filed:

Jun 10, 1996

Appl. No.:

8/660996

Inventors:

Carolyn M. Kramer - Moorestown NJ
John F. McLaughlin - Lakehurst NJ
Robert D. DeLuca - Pennington NJ
John A. Hornor - Siklerville NJ
Mary J. Daub - Mt. Laurel NJ
Kevin A. Andino - Freehold NJ

Assignee:

Ceramco Inc. - Burlington NJ

International Classification:

C03C 3091

US Classification:

106 35

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.