Non-pre-colored multi-layer zirconia dental blank that has a gradual change in translucency through a thickness after sintering
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United States of America Patent
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Jan 20, 2015
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app pub date -
Feb 23, 2012
filing date -
Feb 23, 2012
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Abstract
A dental block for producing a dental prosthesis comprises a green body including zirconia and having a chemical composition including increasing amounts of yttria through a thickness of the green body. The green body is substantially opaque with a substantially consistent optical characteristic of non-translucency with respect to visible light across the thickness, and is subsequently millable and sinterable to form the dental prosthesis with an optical characteristic of increasing translucency through a thickness of the dental prosthesis.
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