Non-pre-colored multi-layer zirconia dental blank that has a gradual change in translucency through a thickness after sintering
US8936848B2 · kind B2 · utility
33Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Feb 23, 2012 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Jan 6, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24967
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.