Abstract An all-ceramic dental restorative comprising a core and a glaze having the following composition: ______________________________________ Component Proportion, %
______________________________________
SiO 2 71-74
Al 2 O 3 10-12
K 2 O 4-5
Na 2 O 4-5
CaO 2-4.5
B 2 O 3 3.5-5.5.
______________________________________
An all-ceramic dental restoration comprising a ceramic core and a translucent glaze, said glaze having a maturing temperature of from about 1700° to about 1900° F., and a coefficient of thermal expansion of from about 4 to about 9×10 -6 in./in./°C., and consisting essentially of, on a weight basis, the following components: ______________________________________
Component Proportion, %
______________________________________
SiO.sub.2 71-74
Al.sub.2 O.sub.3
10-12
K.sub.2 O 4-5
Na.sub.2 O 4-5
CaO 2-4.5
B.sub.2 O.sub.3
3.5-5.5.
______________________________________
Claim 2
Dependent Claim
74 words
An all-ceramic dental restoration comprising a ceramic core and a translucent glaze, said glaze having a maturing temperature of from about 1700° to about 1900° F., and a coefficient of thermal expansion of from about 4 to about 9×10 -6 in./in./°C., and consisting essentially of, on a weight basis, the following components: ______________________________________
Component Proportion, %
______________________________________
SiO.sub.2 71-74
Al.sub.2 O.sub.3
10-12
K.sub.2 O 4-5
Na.sub.2 O 4-5
CaO 2-4.5
B.sub.2 O.sub.3
3.5-5.5.
______________________________________