Patent ID: 7806694
Filing Date: 2010-10-05
Classification: A61C,B22F,B33Y,B82Y,C01G,C01P,C04B

Abstract:
1. A method of manufacturing a dental article comprising: forming particulate ceramic material consisting essentially of ceramic crystallites with average size of less than about 20 nm into a dental article; sintering the particulate ceramic material without the application of external pressure at a temperature less than about 1300° C. to provide a final ceramic material having grains of average grain size exceeding 100 nanometers and not exceeding about 400 nanometers and a final density exceeding 95% of the theoretical density of the ceramic material; wherein the final ceramic material exhibits at least 30% relative transmission of visible light when measured through a thickness in the range of about 0.3 to about 0.5 mm.