Multi-layer zirconia dental blank that has a gradual change in strength, translucency and chroma from one direction to the other after sintering
US10238473B2 · kind B2 · utility
2Cited by
16References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2017 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Jul 10, 2037 |
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 has a substantially consistent optical characteristic of chroma and translucency across the thickness, and is subsequently millable and sinterable to form the dental prosthesis with an optical characteristic of decreasing chroma, increasing translucency, and decreasing strength, in one direction through a thickness of the dental prosthesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.