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US 2023/0404723 A1Published application
Process for the preparation of a zirconia blank
AssigneeIvoclar Vivadent AG
InventorsBo Jiang, Christian Ritzberger, Frank Rothbrust
Life of this patent
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Abstract
A zirconia blank produced by introducing a zirconia suspension into a porous mould and demoulding the blank formed as well as the use of the optionally presintered blank formed for the preparation of a dental restoration using a very short dense-sintering process.
Claims23
A zirconia blank which is obtainable by the process comprising
- (a) introducing a suspension of zirconia in a liquid medium into a mould having pores,
- (b) at least partially removing the liquid medium via the pores and
- (c) removing the blank formed from the mould,
- wherein the suspension has a zirconia content of from 68 to 88 wt.-%.
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A zirconia blank which is presintered and has a density of from 3.4 to 4.0 g/cm3
- and/or
- a pore volume of from 0.08 to 0.14 cm3/g
- and/or
- a maximum pore diameter of less than 0.15 μm.
1 more element
Dependencies are inferred from the claim text.