Dental blank comprising a pre-sintered porous zirconia material, process of its production and dental article formed from said dental blank

• Main Authors: Hauptmann Holger, Kolb Brant U, Herrmann Andreas, Schmittner Sybille, Schechner Gallus
• Format: Patent
• Language: English
• Published: 14.03.2017
• Subjects: APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DENTISTRY; HUMAN NECESSITIES; HYGIENE; LIME, MAGNESIA; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; NANOTECHNOLOGY; PERFORMING OPERATIONS; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; REFRACTORIES; SLAG; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING; TREATMENT OF NATURAL STONE

The invention relates to a dental mill blank comprising a pre-sintered porous zirconia material, the porous pre-sintered zirconia material showing a N2 adsorption of isotherm type IV according to IUPAC classification, the porous pre-sintered zirconia material having a Vickers hardness from about 25 to about 150, the dental mill blank comprising means for reversible attaching it to a machining device. The invention also relates to a process of producing a zirconia dental article comprising the steps of providing a dental mill blank comprising a porous pre-sintered zirconia material, placing the dental mill blank in a machining device, machining the porous zirconia material and to a dental article obtained by such a process.