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US 12,740,847 B2Granted
Zirconia mill blank for dental cutting and machining and preparing method thereof
AssigneeShofu Inc.
InventorsKazumichi Nonaka, Shuhei Takahashi
Life of this patent
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Abstract
To provide a zirconia mill blank for dental cutting and machining which has excellent machinability in a thin workpiece such as an inlay, an onlay and a veneer, and may impart high strength and high translucency to a zirconia perfect sintered body without a special sintering such as HIP treatment, and a preparing method thereof. The zirconia mill blank for dental cutting and machining has a porosity within a range of 15 to 30%.
Claims16
A preparing method of a zirconia mill blank for dental cutting and machining, comprising;
- a zirconia powder molding process, and
- a cold isostatic pressing molding process, wherein;
- the cold isostatic pressing molding process includes at least two or more of a series of processes including an application process applying a load pressure, an increase process increasing the load pressure to a maximum load pressure and a release process releasing the load pressure.
Dependencies are inferred from the claim text.