Patent ID: 6485305
Filing Date: 2002-11-26
Classification: A61C

Abstract:
A blank for producing a formed part that can be used for replacement or restoration of one or more teeth by removing material with at least one tool chucked in a processing machine, said blank comprising a blank member of a tooth restoration material from which the formed part can be worked with a tool, a retainer projection extending from one end of the blank member for holding the blank member in the processing machine, and a separate reference part having a circular-cylindrical cross section and containing at least two reference surfaces that are defined with a space between one another with a close tolerance in a range of Â±{fraction (1/100)} mm, said reference part being secured in place on an end of the blank member lying opposite the retainer projection, the diameter of the retainer projection, the concentricity of the blank member and the concentricity of the reference surface in respect to the retainer projection having tolerances in a range of Â±{fraction (2/10)} mm, which are rough tolerances compared with the close tolerances of the two reference surfaces of the reference part.