Patent ID: 8080189

Claim:
A process for producing a ZrO 2 — containing translucent inorganic-inorganic dental restoration having a biaxial strength of not less than 800 MPa and a fracture toughness of more than 6.5 MPa m 1/2 , comprising the steps of: producing an open-pore blank of ZrO 2 powder by pressing and debinding, pre-sintering the blank, applying an infiltration substance, which comprises a precursor of a nonmetallic-inorganic phase, or an amorphous glass phase and a solvent, or of a hydrolysable compound of a metal, or contains an alkoxide of a metal, or a precursor of a silicate glass to said shaped part at room temperature and under vacuum, carrying out penetration of the infiltration substance into the blank during an infiltration time of less than 10 minutes, sintering the blank in a densifying manner under an air atmosphere and at ambient pressure, to a theoretical density of at least 99.5%, at a temperature of from 1000° C. to 1600° C. to form a translucent core and an covering layer, and removing the covering layer by a machining operation and/or etching, and shaping the blank to form the dental restoration.