Iterative repair method for holes of false tooth triangular mesh model

Abstract

The invention discloses an iterative repair method for holes of a false tooth triangular mesh model. The method includes: preliminarily adding new triangular pieces for the holes through information of adjacent sides of hole borders according to reserved information of the hole borders of the false tooth triangular mesh model, adopting an iterative algorithm for generating new borders, and optimizing a vertex position each time iteration is carried out. By means of incremental repair for the holes, a hole repair surface is gradually faired from center to outside, and accordingly integral fairness is greatly improved, and the problem of stress concentration of repaired false teeth due to feature information loss caused by large curvature changes at positions of cervical margin lines, tooth fossea and the like is solved. The iterative repair method for the holes of the false tooth triangular mesh model is widely applicable to the field of repair of false teeth.

Description

technical field [0001] The invention relates to the field of denture restoration, in particular to an iterative repair method for holes in a triangular mesh model of dentures. Background technique [0002] There are mainly two types of existing triangular mesh hole repair methods. One is to construct an implicit surface that fits the hole based on the points on the edge of the hole, and then triangulate the implicit surface to repair the hole; the other is to simply generate a triangular surface first. patch the hole, and then iteratively approximates the vertices of the newly added triangular patch to a better position according to the point information on the edge of the hole. [0003] The existing technology can realize the repair of holes, and the repair effect is very good in places where the curvature changes less. However, the biological characteristics of the teeth determine that the curvature changes in places such as the cervical line and the tooth socket. For rep...

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Problems solved by technology

[0003] The existing technology can realize the repair of holes, and the repair effect is very good in places where the curvature changes less. However, the biological characteristics of the teeth determine that the curvature changes in places such as the cervical line and the tooth socket. For repairing, since the triangular patch is first added to the hole plane as a whole, and then the triangular patch is projected onto the implicit surface, some feature information will be lost, such as the degree of concavity and convexity, and the direction of concavity and convexity, etc., which will affect the subsequent tooth restoration process, such as Cervical line extraction, etc.; if it is a hole at the cusp and socket, it will also cause stress concentration problems in the produced denture restoration

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