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A Simulation Method of Gingival Deformation Based on the Mass Spring Model of Tooth Long Axis

A technology of particle spring model and simulation method, which is applied in the field of image processing, and can solve problems such as long time, huge amount of calculation, and unintuitive interaction process

Active Publication Date: 2021-01-08
秦皇岛知聚科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has obvious disadvantages: the interactive process is not intuitive, the flexibility is high and difficult to control, the deformation result is not easy to achieve the expected result, and when the number of control points is large, it will increase the time consumption
However, the amount of calculation is huge, the time is long, and it is difficult to achieve real-time performance, especially for nonlinear finite element

Method used

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  • A Simulation Method of Gingival Deformation Based on the Mass Spring Model of Tooth Long Axis
  • A Simulation Method of Gingival Deformation Based on the Mass Spring Model of Tooth Long Axis
  • A Simulation Method of Gingival Deformation Based on the Mass Spring Model of Tooth Long Axis

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Embodiment Construction

[0041] After the system reads the STL file of the jaw model, it calculates and obtains the gingival dividing line, and separates a single tooth from the gingiva. The invention is to carry out the research on the gingival deformation method on the model after segmentation. Such as figure 1 As shown, the specific modeling steps are as follows:

[0042] Step (1) Determine the gingival model.

[0043] The method of studying gingival deformation is generally to operate on a single tooth, so the present invention simplifies the tooth segmentation operation part, only divides a single tooth, first selects the tooth to be corrected, and then selects the adjacent teeth, such as figure 2 As shown, the adjacent teeth are identified here so that the meshes of the adjacent teeth will not be included when the next step is to expand and generate the gingival deformation area. Then generate the dividing line, adjust the dividing line to the ideal position, divide the teeth and gums, and est...

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Abstract

The invention discloses a gingival deformation simulation method based on a mass-spring model of the long axis of a tooth. The method comprises steps of: determining a gingival model; calculating the position of the long axis of the tooth; storing the initial position, the adjacent point, and the mapping point, corresponding to the long axis of the tooth, of a mass point; determining the position, the speed, and the borne force of the mass point in each time step, namely each iteration; calculating the new position of the long axis of the tooth according to a moving matrix when a dental crown is dragged; and determining a stop condition and outputting a simulation result. The gingival deformation simulation method achieves a good simulation effect because an improved mass-spring model is better than a simplified mass-spring model in the deformation effect and is greatly reduced in time consumption.

Description

technical field [0001] The invention belongs to the field of image processing and relates to the simulation of an improved simplified particle spring model in gingival deformation. Background technique [0002] In recent years, with the continuous development of 3D printing technology and digital geometry processing technology, the triangular mesh model has become the mainstream representation of 3D models, and then how to interactively simulate the triangular mesh model in real time has always been a concern of researchers. Research hotspots. In the decades of deformation technology development, in order to make the deformation simulation system more stable, real, real-time, and accurate, scholars have proposed and extended dozens of deformation simulation methods, and many scholars have classified them according to different angles, mainly divided into Geometric and physical methods. [0003] Among them, the free-form deformation technology in the geometric method was pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/20G16H50/50
CPCG06T17/20G06T2210/41G16H50/50
Inventor 李占利李洪安武璠菲王明明
Owner 秦皇岛知聚科技有限公司
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