Method for making appliance by virtual gingival deformation treatment based on SVM (support vector machine)

A support vector machine, deformation processing technology, applied in image data processing, dentistry, instruments, etc., can solve problems such as gingival deformation

Active Publication Date: 2019-09-27
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: Aiming at the problem that the gums deform with the movement of the teeth in the invisible braces correction technology, a method for making an appliance based on the virtual gum deformation processing based on the support vector machine is proposed

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  • Method for making appliance by virtual gingival deformation treatment based on SVM (support vector machine)
  • Method for making appliance by virtual gingival deformation treatment based on SVM (support vector machine)
  • Method for making appliance by virtual gingival deformation treatment based on SVM (support vector machine)

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Embodiment Construction

[0044] Such as figure 1 As shown, the process flow of the virtual gingival deformation processing method based on support vector machine of the present invention includes the following steps:

[0045] 1. Read in the jaw model grid file, which is an STL triangular grid file obtained by scanning the plaster model with a 3D scanner and cutting and repairing it. Cut restoration refers to the separation of the connected teeth in the model mesh into independent teeth, by copying the common mesh point or common mesh edge of the connection part of the two teeth and replacing one of the teeth grid data at the same location.

[0046] 2. According to the obvious protrusions and depressions in the transition part between the teeth and the gums in the STL triangular mesh file, manually select the corresponding mesh edge through the grid visualization interface to form a dividing line between the teeth and the gums, as shown in figure 2 As shown, the dividing line is the curve between th...

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Abstract

The invention discloses a method for making an appliance by virtual gingival deformation treatment based on an SVM (support vector machine), and aims to improve wearing comfort of the appliance and reduce extrusion on gingival tissue. According to the technical scheme, a dental model grid is separated into a tooth model grid and a gingiva model grid, grid points at the connecting part of the grids are taken as control points, a tooth is moved to a target position according to the therapeutic schedule of a doctor, an SVM regression model is trained in each coordinate direction according to coordinates and offset of the control points at the upper part and fixed points at the lower part of the gingiva grid, internal points of the gingiva grid are moved in three directions according to model functions, the deformed grid is obtained, and the appliance is obtained by 3D printing on the basis of new tooth and gingiva grids. With the adoption of the method, the gingiva grid is smoother, the appliance made by the gingiva grid is more fitted to real gingiva of a patient, and the therapeutic effect can be realized rapidly.

Description

technical field [0001] The invention belongs to the technical field of digital orthodontics, and in particular relates to a method for manufacturing an appliance based on virtual gingival deformation processing of a support vector machine. Background technique [0002] With the rapid development and cross-integration of computer technology and modern medicine, the application of medical simulation systems has gradually become popular. Orthodontics is an important field of stomatology. With the help of digital oral technology, the integrated invisible braces correction technology has also made great progress. The digital simulation auxiliary system is to realize the whole process of tooth movement and gingival deformation in orthodontic treatment on the computer, so as to obtain the dental model and required parameters in each stage of orthodontic treatment, which is very helpful for doctors to implement treatment and make orthodontic appliances . [0003] In order to estab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C7/00G06K9/62G06T17/00
CPCA61C7/002G06T17/00A61C2007/004G06F18/2411G06F18/214
Inventor 高翔徐传福熊敏李大力车永刚吴诚堃郭晓威张翔李超蓝龙王思齐王正华
Owner NAT UNIV OF DEFENSE TECH
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