Parameterized false tooth coronal internal surface generation method

Abstract

The invention discloses a parameterized false tooth coronal internal surface generation method. The parameterized false tooth coronal internal surface generation method comprises the steps of S1, obtaining a prepared tissue surface of a false tooth coronal, and obtaining preset generation parameters of a false tooth coronal internal surface at the same time; S2, configuring a reference cross section of the prepared tissue surface; S3, generating multiple regression line rings from the prepared tissue surface according to the reference cross section, and meanwhile, conducting region dividing onthe prepared tissue surface according to the preset generation parameters; S4, conducting non-equidistant bias on the divided regression line rings in different areas according to the preset generation parameters; S5, matching the biased regression line rings; S6, adopting a skin subdivision algorithm to generate the false tooth coronal internal surface from the matched regression line rings. Bymeans of the parameterized false tooth coronal internal surface generation method, the prepared tissue surface can be subjected to region segmentation, then different areas of the top, the side surfaces and the bottom of the prepared tissue surface are processed, and finally the false tooth coronal internal surface is generated. Optimal fitting can be achieved, and the parameterized false tooth coronal internal surface generation method is small in calculation amount and high in precision, and can be widely applied to the false tooth repair industry.

Description

technical field [0001] The invention relates to the field of denture restoration, in particular to a parameterized method for generating the inner surface of a denture crown. Background technique [0002] In recent years, the application of CAD / CAM technology in the field of oral restoration has achieved rapid development. Compared with traditional manual restoration methods, oral CAD / CAM technology has significantly reduced the labor intensity of dental technicians and greatly improved restoration efficiency. , with better restoration quality, and at the same time meet the design requirements of personalized restorations. In oral clinical restoration, when there is a serious defect in the maxillofacial teeth, it needs to be repaired with a denture crown, which is a restoration that covers the entire tooth surface. The digital design of a denture crown consists of two parts: the design of the inner surface and the design of the outer surface. The inner surface of the dentu...

AI Technical Summary

Problems solved by technology

In the current technology, among the ways to generate the inner surface of the denture crown, some methods use the prepared body tissue surface as the inner surface of the denture crown. This method does not consider the thickness of the adhesive, and cannot achieve accurate alignment between the inner surface of the denture crown and the prepared body tissue surface. fit

In some methods, the inner surface of the denture crown is obtained by equidistant from the tissue surface of the preparation. This method takes into account the influence of the thickness of the adhesive, and can achieve accurate fit between the inner surface of the denture crown and the tissue surface of the preparation, but it does not take into account the influence of the thickness of the preparation. The non-uniform requirements for adhesive thickness in different areas of the top, side, and bottom of the body tissue surface cannot control the thickness of the adhesive in different areas of the preparation body tissue surface, and also cannot achieve optimal fit

It can be seen that in the current technology, the inner surface of the generated denture crown cannot achieve an optimal fit with the tissue surface of the denture preparation.

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