Dentistry – Prosthodontics – Tooth construction
Patent
1998-11-12
2000-12-05
Jones, Deborah
Dentistry
Prosthodontics
Tooth construction
433218, 4332221, 428697, 428699, 428702, 106 35, A61C 1308
Patent
active
061558303
ABSTRACT:
A dental restoration comprising a porcelain composition, comprising a glassy matrix and leucite crystallites embedded therein, and having maturing temperatures in the range from about 680.degree. C. to about 870.degree. C. and CTEs in the range from about 12 to about 15, more preferably in the range from about 12.5 to about 14.5, and most preferably in the range from about 13.1 to about 14.5.times.10.sup.-6 /.degree. C. (measured from 25.degree. C. to 470.degree. C.). The porcelain is used in combination with a ceramic core or metal framework. The ceramic core comprises cubic leucite and exhibits maturing temperatures less than about 1200.degree. C. and CTEs in the range of about 12.5 to about 15.0.times.10.sup.-6 /.degree. C. (measured from 25.degree. C. to 500.degree. C.).
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Brightly Richard A.
Brodkin Dmitri
Kaiser Lisa M.
Panzera Carlino
Panzera Paul
Jeneric Pentron Incorporated
Jones Deborah
Knab Ann M.
Stein Stephen
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