High-strength dental restorations
First Claim
Patent Images
1. A lithium disilicate dental product made with glass-ceramic blanks formed by the process comprising:
- melting a starting glass composition at temperatures within the range of about 1200 to about 1600°
C.;
forming the molten glass into shaped blanks;
annealing the glass blanks at temperatures in the range of 300°
to about 600°
C. for a time in the range of about 15 minutes to about 8 hours;
subjecting the glass blanks to one or more heat treatments in the temperature range of from about 400°
to about 1100°
C. to convert the glass blanks into glass-ceramic blanks; and
wherein the dental restoration comprises a high strength reinforcing bar.
5 Assignments
0 Petitions
Accused Products
Abstract
Lithium disilicate based glass-ceramics contain high strength ceramic components for use in the manufacture of dental products. The glass-ceramics have good pressability, i.e., the ability to be formed into dental products by heat-pressing using commercially available equipment. The strength of the dental articles is increased with the inclusion of the high strength ceramic components.
170 Citations
22 Claims
-
1. A lithium disilicate dental product made with glass-ceramic blanks formed by the process comprising:
-
melting a starting glass composition at temperatures within the range of about 1200 to about 1600°
C.;
forming the molten glass into shaped blanks;
annealing the glass blanks at temperatures in the range of 300°
to about 600°
C. for a time in the range of about 15 minutes to about 8 hours;
subjecting the glass blanks to one or more heat treatments in the temperature range of from about 400°
to about 1100°
C. to convert the glass blanks into glass-ceramic blanks; and
wherein the dental restoration comprises a high strength reinforcing bar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A lithium silicate dental restoration made with glass-ceramic powder formed by the process comprising:
-
melting a starting glass composition at temperatures within the range of about 1200°
C. to about 1600°
C.;
quenching the glass melt;
subjecting the quenched glass to one or more heat treatments in the temperature range of from about 400°
C. to about 1100°
C. to convert the glass into a glass-ceramic;
comminuting the glass ceramic to a powder;
forming the powder onto a die to form a dental restoration, wherein the die has a high strength reinforcing bar positioned thereon; and
sintering the formed dental restoration having the high strength reinforcing bar therein.
-
-
22. A lithium disilicate dental product made by the process comprising:
-
melting a starting glass composition at temperatures within the range of about 1200°
C. to about 1600°
C.;
quenching the glass melt;
subjecting the quenched glass to one or more heat treatments in the temperature range of from about 400°
C. to about 1100°
C. to convert the glass into a glass-ceramic;
comminuting the glass ceramic to a powder;
compacting the powder to a starting blank;
sintering the blank; and
wherein the dental product comprises a high strength reinforcing bar.
-
Specification