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Automatic detection and repairing method of dentulous jaw black triangle

A repair method and automatic detection technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problems of easy omission, cumbersome operation, low efficiency of black triangle, etc., and achieve the effect of high accuracy and high efficiency

Active Publication Date: 2015-05-06
杭州一牙数字口腔有限公司
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AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of low efficiency, easy omission, and cumbersome operation in manual detection and repair of black triangles, the present invention provides an automatic detection and repair of black triangles that can automatically detect and repair black triangles with high accuracy and high efficiency. method

Method used

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  • Automatic detection and repairing method of dentulous jaw black triangle
  • Automatic detection and repairing method of dentulous jaw black triangle
  • Automatic detection and repairing method of dentulous jaw black triangle

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Embodiment Construction

[0033] Such as Figure 10 As shown, an automatic detection and repair method of the black triangle of the jaw, including the following steps:

[0034] 1) Perform three-dimensional virtual reconstruction of the patient's jaw to form a dental model;

[0035] 2) The jaw model is represented by a spatial triangular mesh M=(G,R), where G=(V,E,F) is composed of the vertex set V={vi}, the edge set E={(vi,vj) }, a connected graph composed of a triangular face set F={(vi,vj,vk)}, and the mesh model satisfies the two-dimensional manifold property; such as figure 1 shown.

[0036] 3) Apply the grid plane parameterization method to parametrize the spatial triangular mesh M to form a planar triangular mesh P, and the spatial triangular mesh M and the planar triangular mesh P are topologically isomorphic; figure 2 shown.

[0037] 4) Detect the intersecting triangular face set T on the planar triangular mesh P, and divide the intersecting triangular face set T into multiple connected reg...

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Abstract

An automatic detection and repairing method of a dentulous jaw black triangle comprises the following steps: carrying out three-dimensional virtual reconstruction on a dentulous jaw of a patient to form a dentulous jaw model; representing the dentulous jaw model by using a space triangular mesh M; carrying out plane parameterization on the space triangular mesh M to form a plane triangular mesh P; detecting all crossed triangular plane sets on the plane triangular mesh P; marking the crossed triangular plane sets as T and finding all communicated regions in the crossed triangular plane sets T, wherein all the communicated regions are independent and one black triangle of the space triangular mesh M is formed by each communicated region; separating each black triangle from the dentulous jaw model and deleting a separated black triangle region; forming a hole in the dentulous jaw model by a previous black triangle; and smoothing and repairing each hole of the dentulous jaw model to obtain a novel dentulous jaw model with the repaired black triangle. The automatic detection and repairing method has the advantages that the black triangle on the dentulous jaw model can be automatically detected and identified, manual experience intervenes are not needed, the accuracy is high and the efficiency is high.

Description

technical field [0001] The invention relates to the field of invisible aligners without brackets, in particular to a method for detecting black triangles of teeth and jaws and restoring black triangles of teeth when making invisible aligners without brackets. technical background [0002] With the rapid development of computer graphics technology and scanning technology, invisible orthodontic technology without brackets has been widely used in clinical orthodontics. Bracketless invisible aligner is a computer-aided design and production of transparent elastic material movable orthodontic device. It is a series of continuous orthodontic devices, and achieves the purpose of orthodontics through continuous small-scale tooth movement. [0003] When making clear aligners without brackets, it is necessary to digitize the patient's dental model. Model digitization mainly refers to reconstructing the three-dimensional virtual model of the patient's jaw by using scanning equipment b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30G06T7/00
Inventor 陈飞舟
Owner 杭州一牙数字口腔有限公司
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