Composition and Method for manufacturing coloured blanks and dental moulded parts

• Main Authors: HOELAND, WOLFRAM, DR, ROTHBRUST, FRANK, KERSCHBAUMER, HARALD, RHEINBERGER, VOLKER M, RITZBERGER, CHRISTIAN, APEL, ELKE
• Format: Patent
• Language: English; French; German
• Published: 09.10.2013
• 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; MEDICAL OR VETERINARY SCIENCE; METALLURGY; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

Preparation of blank and dental molded part, containing color donor compounds comprises coating an oxide powder with the color donor substance; optionally classifying the coated powder and optionally filling into a matrix in pressed form; pressing the colored powder to a molded body; sintering the pressed molded body to a blank and optionally forming dental molded part from the blank. Independent claims are included for: (1) uni- or multi- colored molded bodies, blanks or dental molded parts from colored ceramic oxide powder, where the ratio of the ceramic oxide powder and color donor oxide is 100:0.0001 to 2 parts by weight; (2) a composition based on zirconium dioxide comprising 0.0001-0.75 wt.% of praseodymium such as praseodymium oxide, iron such as ferric oxide, terbium such as terbium sesquioxide or manganese such manganese oxides; and (3) molded body comprising the composition.