Patent ID: 6645285
Filing Date: 2003-11-11
Classification: A61C,A61K,C03C

Abstract:
A micaceous glass-ceramic for use in the fabrication of a dental restoration comprising a color and shade selected from a variety of colors and shades to adequately match the colors and shades of teeth found in 95% or more of the human population comprising:about 43 to about 72 weight % SiO2; about 3 to about 14 weight % Al2O3; about 10 to about 30 weight % MgO; about 5 to about 10 weight % F; up to about 3 weight % B2O3; up to about 3 weight % ZnO; up to about 7 weight % CaO; up to about 5 weight % BaO and SrO; up to about 3 weight % Li2O; up to about 7 weight % K2O; up to about 3 weight % Na2O; up to about 2 weight % CeO2, La2O3 and Tb4O7; up to about 3 weight % TiO2; and up to about 10 weight % ZrO2.