Polycrystalline translucent alumina-based ceramic material, uses, and methods

Polycrystalline translucent alumina-based ceramic material, uses, and methods
Free Patents Online
United States Patent Number 6878456
Publication Date; April 12, 2005
Inventors: Castro; Darren T. (Woodbury, MN);Rusin; Richard P. (Woodbury, MN)
Assignee: 3M Innovative Properties Co. (St. Paul, MN)
Filing Date: December 28, 2001
Abstract:
A polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7. The material can be in the form of a dental mill blank, dental prosthesis or other dental article or non-dental article.