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Hole repairing method for digital tooth grid model

A mesh model and hole technology, applied in the field of geometric repair, can solve problems such as stiffness at the boundary of the mesh model

Active Publication Date: 2012-10-03
ZHEJIANG UNIV
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Problems solved by technology

[0006] The invention provides a method for repairing holes in a digital tooth mesh model, which can improve the quality and efficiency of mesh generation, and solves the problem that the generated mesh model is relatively stiff at the boundary in the prior art

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  • Hole repairing method for digital tooth grid model
  • Hole repairing method for digital tooth grid model
  • Hole repairing method for digital tooth grid model

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Embodiment Construction

[0066] The hole repairing method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0067] a kind of like figure 1 The hole repairing method of the shown digital tooth mesh model, comprises steps:

[0068] (1) Input the digital tooth mesh model, the system automatically searches the boundary of the digital tooth mesh model and highlights all the vertices of the boundary.

[0069] The boundary search algorithm of the digital tooth mesh model further includes the following steps:

[0070] (1.1) Find a seed vertex on the boundary of the tooth mesh model: the criteria for finding are as follows:

[0071] By checking all the vertices in the input digital tooth mesh model, find the number of adjacent triangles and the number of adjacent edges around the vertex, and use the first found vertex with the number of adjacent triangles and the number of adjacent edges that is not equal as the tooth network The seed vertex of the l...

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Abstract

The invention discloses a hole repairing method for a digital tooth grid model. The method comprises the following steps: automatically searching the boundary of the digital tooth grid model and displaying all the vertexes of the boundary; alternately selecting vertexes belonging to the hole boundary from all the vertexes as starting and stopping vertexes of the hole boundary, and constructing a closed hole boundary based on the starting and stopping vertexes; performing triangular grid filling on the closed area in the closed hole boundary by adopting a forward travelling wave propelling algorithm and generating the grid mesh surface of the closed area; and optimizing the grid mesh surface in the closed area and near the original tooth grid model boundary by adopting a least squares grid algorithm. According to the hole repairing method, the surface mesh of the tooth model hole area can be rapidly generated by directly selecting the starting and stopping vertexes on the hole boundary of the originally input digital tooth grid model, then the newly generated grid can be optimized, so that the grid on the part of the hole area can be naturally spliced with the tooth grid on the original model, and the newly generated curve is smooth and has high quality.

Description

technical field [0001] The invention relates to the field of geometric repair, in particular to a hole repair method of a digital tooth mesh model. Background technique [0002] Invisible orthodontics is a multi-disciplinary cross-application. First, the editing of the digital digital tooth mesh model is completed through computer-aided design, and then the medical braces are generated through related technologies of materials science for orthodontics. The digital dental mesh model is composed of geometric information and connection relationship. The geometric information gives the position coordinates of each vertex in three-dimensional space, and the connection relationship connects these position information into a special polygonal surface. [0003] The dental model after 3D scanning and reconstruction is a whole, which cannot meet the needs of rearranging individual teeth and designing orthodontic solutions. Therefore, the first step in mesh editing is to separate each ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30
Inventor 邱妮娜杜中义金小刚
Owner ZHEJIANG UNIV
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