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US 6,200,137 B1Granted
Chemically stable translucent apatite glass ceramic
AssigneeIvoclar AG
InventorsWolfram Höland, Martin Frank, Helga Drescher, Volker Rheinberger
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Abstract
An apatite glass ceramic is described which is characterized by good chemical stability, a low expansion coefficient and high translucence, and is particularly suitable, by itself or together with glasses or other glass ceramics, as a veneering material for ceramic dental restorations.
Claims21
A dental material comprising a chemically stable, translucent apatite glass ceramic, which contains CaO, P2O5 and F in a molar ratio of
- CaO:P2O5:F 1:0.020 to 1.5:0.03 to 4.2
- and comprises apatite crystals as the main crystal phase, wherein the apatite crystals are needle-shaped.
Dependencies are inferred from the claim text.