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US 6,485,849 B2Granted
Method for molding dental restorations and related apparatus
AssigneeTEC Ventures, Inc.
InventorRichard W. Petticrew
Life of this patent
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AssigneeTEC Ventures, Inc.
InventorRichard W. Petticrew
Estimating the term…
The present invention is concerned with a process for the formation of dental restorations from glass-ceramic materials and the resulting dental restorations. A dental restoration is prepared by placing a glass-ceramic material in a heat-pressure deformable crucible. Heat is applied to the crucible to bring the glass-ceramic to a working range at temperatures above its liquidus temperature. The crucible has heat-pressure deformation properties which are matched to the working temperature of the glass-ceramic. Once the glass-ceramic is heated to its working temperature, the crucible is brought into contract with a mold having a cavity therein. As the distance between the heated crucible and the mold is decreased, the crucible is deformed to form a seal with the mold facilitating the injection of the molten glass-ceramic into the cavity. The resulting dental restoration has superior optical, esthetic and strength properties.
A dental restoration which is formed from a glass ceramic material, which does not deform during heat treating, comprising the following composition (by weight percent);
A dental restoration which is formed from a glass-ceramic material, which does not deform during heat treating, comprising the following composition (by weight percent;
A dental restoration which is formed from a glass-ceramic material, which does not deform heat treating, comprising the following composition (by weight percent);
A dental restoration which if formed from a glass-ceramic material, which does not deform during heat treating, comprising the following composition (by weight percent);
A dental restoration which is formed from a glass-ceramic material, which does not deform during heat treating, comprising the following composition (by weight percent);
A dental restoration which is formed from a glass-ceramic material, which does not deform during heat treating, comprising the following composition by (weight percent);
A dental restoration which is formed from a glass-ceramic material, which does not deform during heat treating, comprising the following composition (by weight percent);
Dependencies are inferred from the claim text.