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AssigneeEidgenossische Technische Hochschule Zurich
InventorsFrank Filser, Ludwig Gauckler, Peter Kocher, Heinz Luethy, Peter Schaerer
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The invention relates to an automatic machine tool, for the production of base structures, for false teeth, in particular, for tooth crowns and/or tooth bridges of exact three-dimensional shape. Said base structures may be fixed to prepared natural and/or artificial tooth stumps. The machine tool comprises a machine frame, or a body, a work piece carrier, with a rotation shaft, at least one digitization unit, at least one machining unit and an electronic arithmetic and control unit for all drive lines. A carrier for the workpiece, a blank, and/or for the machining unit(s), serves as displacement unit, with three translational axes in the x-, y- and z-directions. The digitization of the preparation model and the machining of the blank are carried out on the same machine tool, at different times. The machining paths for the blank are calculated from the measured and stored digitized data and a predetermined material-specific scaling factor, before the machining of the blank.
Automatic machine tool for production of basic structures for dental prostheses of precise three-dimensional shape, which basic structures can be attached to prepared natural and/or artificial dental stumps, where the machine tool has a frame means, a workpiece carrier with one common rotation shaft having an axis L for a blank, at least one digitisation unit, at least one machining unit and an electronic calculating and control unit for all drive elements, wherein at least one of the workpiece carrier for the blank and a dental preparation model on the one hand and the machining unit and the digitisation unit on the other hand are on a common movable unit with three linear translation axes in the x, y and z direction, and wherein the one common rotation shaft has on either end clamping means for securing the blank on one end and the dental preparation model on the other end,
Dependencies are inferred from the claim text.