Porcelain coating compositions for low expansion porcelain cores and the resulting all-ceramic dental restorations

摘要

An all-ceramic dental restoration comprising a ceramic core over and at least one coating thereon of a porcelain composition having a maturing temperature of from about 850° to about 1050° C. and a coefficient of thermal expansion of from about 4.0 to about 13 (room temperature to 500° C.) parts per million per °C. comprising:ComponentAmount (Wt. %)SiO₂69 - 75Al₂O₃4.0 - 9.5Na₂O5 - 10K₂O0 - 4CaO0 - 1.5MgO0 - 6B₂O₃6 - 15F0 - 3