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Proceedings of CAD'17, 2017, 176-180
Linkage-FFD Algorithm for Dental Crown and Abutment Shape Design
Xun Li, Harbin Institute of Technology
Abstract. Dental CAD system has been widely used in clinical trials, greatly improving the success rate of surgery and shortening the operation cycle. For dental CAD, one of core functions is to model the crown shape. In current dental CAD packages, designing a crown includes two steps: 1) first take a corresponding standard tooth from the database and 2) repeatedly fine-edit it using some shape deformation algorithm to obtain the final ideal shape. So far, lots of research work has been done on the crown design, these studies only focus on the outer surface design of the crown, not synchronically considering the thickness between the designed crown and its abutment (the designed crown will further be glued to the abutment). In the crown design, meeting the standard thickness is a must. As far as we know, all dental CAD systems complete the design of a crown without thickness consideration and the abutment-crown thickness requirement is guaranteed later by mutually adjusting the abutment shape with great care or even repeatedly modifying the shape of already designed crown. This method requires more operating time and skilled experiences, and sometimes the trade-off between the crown thickness and crown shape should be made. If this compromise is not properly dealt with, cervical margin collapse may occur or the high quality occlusal morphology is difficult to obtain.
Keywords. Dental CAD, Dental Implant, Full Crown Design, DMFFD, Mesh Deformation