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| Research and Implementation for Parametric Design of Tooth Preparation |
1 College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2 National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School and Hospital of Stomatology, Beijing 100081, China |
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Abstract Tooth preparation is a key part in the treatment of dental hard tissue disease. In order to develop a new mode of tooth preparing operation and realize automatic preparation, in this paper, we studied the computer aided method of complexshaped and multipleconstrained preparation generation and parametric modification. First, for the characterization of triangular mesh, we proposed parametric operations of preparation generation by analyzing the relationship of dimension chains. By the operations, an wholeceramic preparation model within the standard was generated. Meanwhile, a historybased approach was used to realize the preparation’s dynamic modification. Twenty instances of molar and premolae showed that our method worked well in preparation’s generation and parametric modification. The model was conformed with maximum design deviation of 48 μm by the thirdparty software Geomagic Studio, reaching the clinical adhesion requirement of less than 100 μm.
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