MACHINE TOOL FOR PRODUCTION OF BASIC STRUCTURES FOR DENTAL PROSTHESIS

摘要

The invention relates to an automatic machine tool (10), for the production of base structures (68), for false teeth, in particular, for tooth crowns and/o r tooth bridges of exact three-dimensional shape. Said base structures (68) ma y be fixed to prepared natural and/or artificial tooth stumps. The machine too l (10) comprises a machine frame (12, 14), or a body, a work piece carrier, wi th a rotation shaft (38), at least one digitisation unit (46), at least one machining unit (52) and an electronic arithmetic and control unit (50) for a ll drive lines. A carrier for the workpiece, a blank (42), and/or for the machining unit(s) (52), serves as displacement unit, with three translationa l axes in the x-, y- and z-directions. The digitisation of the preparation mod el (44) and the machining of the blank (41) are carried out on the same machine tool (10), at different times. The machining paths for the blank (42) are calculated from the measured and stored digitised data and a predetermined material-specific scaling factor, before the machining of the blank.