Patent ID: 8943693
Filing Date: 2015-02-03
Classification: A61C,B22F,C22C,Y10T

Abstract:
1. A method for producing tooth parts having a desired shape from dental-grade metal powder, characterized by the process steps: a) preparing a slip of dental-grade metal alloy powder, consisting of chromium cobalt (CrCo) alloy, with a suspension liquid and an admixture of organic compounds, b) pouring this slip into a mold, c) drawing the suspension liquid out of the poured slip to produce a reduced concentration gradient such that the resulting concentration gradient of the suspension liquid prevents the admixture of organic compounds from emerging on a surface of the slip until a mechanically stable green blank is obtained, d) following step c) and before step e), milling the green blank to the desired shape, and e) oxygen-free sintering the tooth parts that have been milled from the green blank, including expelling oxygen by introduction of argon into a sintering furnace.