Dental restorations

US6155830A · kind A · utility

Assignee

• Jeneric/Pentron Incorporated · US

Inventors

• Dmitri Brodkin · Livingston, US
• Carlino Panzera · Madison, US
• Paul Panzera · Mount Holly, US
• Jana N. Pruden · Madison, US
• Lisa M. Kaiser · Monmouth Junction, US
• Richard A. Brightly · Westwood, US

Key dates

• Filing date: Nov 12, 1998
• Grant date: Dec 5, 2000
• Expiry date: Nov 12, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C10/0018
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

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.).