Quick transitional mending method based on triangular mesh of denture base crown

A technology of triangular mesh and base crown, which is applied in the field of denture restoration, can solve the problem that the surface generation speed is difficult to be further improved, and achieve the effect of improving the surface generation speed, optimizing the mesh model, and ensuring uniform distribution.

Active Publication Date: 2015-04-08
FOSHAN NUOWEI TECH
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Problems solved by technology

Among them, in the traditional skinning method, it is necessary to construct a NURBS surface when

Method used

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  • Quick transitional mending method based on triangular mesh of denture base crown
  • Quick transitional mending method based on triangular mesh of denture base crown
  • Quick transitional mending method based on triangular mesh of denture base crown

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Embodiment Construction

[0040] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0041] refer to figure 1 , a method of rapid transitional stitching based on the triangular mesh of the base and crown of the denture, including the following steps:

[0042] A. Read the tooth model that needs to be stitched, and generate a triangular mesh model with a triangular mesh topology, and the triangular mesh model includes an inner surface and an outer surface;

[0043] During the restoration of denture crowns, equidistant offsets are performed to obtain two offset surfaces, one of which is wrapped inside the other, the inner offset surface is the inner surface, and the other offset surface is the outer surface. surface.

[0044] B. Acquiring the seamed boundary points of the triangular mesh model;

[0045] C. Calculate the equidistant point set of the inner surface;

[0046] D. Calculate the outer surface ridge point set;

[0047] ...

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Abstract

The invention discloses a quick transitional mending method based on a triangular mesh of a denture base crown. The method includes the steps of reading a tooth model to be sutured to generate a triangular mesh model; acquiring suture boundary points of the triangular mesh model; calculating an inner surface equidistant point set and an outer surface ridge line point set; performing interpolation according to the two sets to obtain a ridge line set; calculating fitting points of ridge lines according to the ridge line set; according to the fitting points, constructing clockwise a topological relation to generate a transitional face so as to suture the suture boundary points and the transitional face. Compared with the traditional skinning method, the method has the advantages that construction an NURBS (non-uniform rational B-splines) surface is not required, surface generating speed is increased, even distribution of smoothness mesh points on the transitional face is guaranteed, and a generated mesh model is optimized. The method is widely applicable to the field of denture repairing.

Description

technical field [0001] The invention relates to the field of denture restoration, in particular to a rapid transitional stitching method based on the triangular grid of denture base and crown. Background technique [0002] In the denture restoration CAD / CAM system software, the restoration of the simple crown of the denture is generally divided into three parts, including the extraction of the cervical margin, the offset of the isometric plane, and the transition suture of the base crown. The three parts are inextricably linked to the denture restoration process. Due to the equidistant offset in the restoration process of the denture crown, there will be two surfaces, the inner and outer surfaces, and there is a gap between the inner and outer surfaces, so it is necessary to use the transition stitching algorithm to splice the curved surfaces. In the design process, it is often necessary to stitch two or more independent mesh models into one mesh model. [0003] The transi...

Claims

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Application Information

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IPC IPC(8): G06T17/30
CPCG06T17/30
Inventor 王煜张继伟夏鸿建马杰刘锦源
Owner FOSHAN NUOWEI TECH
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