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A method for simulating gingival deformation

A technology of gingiva and deformation points, which is applied in dentistry, orthodontics, dental prosthetics, etc., can solve the problems of reduced accuracy of small parts of the model, influence of accuracy and aesthetics, and large amount of calculation, so as to reduce the amount of calculation, Improves efficiency and smoothes the curved surface of the gums

Active Publication Date: 2020-09-11
NAT INST CORP OF ADDITIVE MFG XIAN
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Problems solved by technology

However, after ordinary Laplace deformation, some burrs appear in the small structural parts, which have a great influence on the accuracy and aesthetics.
[0007] There is also a combination of the particle spring model and the deformation of Laplace. For example, Chinese patent, patent number 201610878247.X proposes a gingival deformation simulation method based on the particle spring model of the long axis of the tooth. The method not only needs to calculate the Laplace representation of each point, but also needs to establish a particle motion system, which requires a lot of calculation, and this method does not take the rotation of the Laplace representation into consideration, and the small size of the deformed model Part accuracy may be reduced

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  • A method for simulating gingival deformation
  • A method for simulating gingival deformation
  • A method for simulating gingival deformation

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Embodiment Construction

[0043] Below in conjunction with a specific example and accompanying drawing, the technical scheme of the present invention is introduced in detail:

[0044] In the process of orthodontic treatment, due to the uncertain information such as the direction and angle of tooth movement of each orthodontic patient, it is necessary to simulate the deformation of the gums in real time according to the actual situation of each patient, so that the orthodontist can carry out accurate and effective treatment Work.

[0045] The present invention designs a method for simulating gingival deformation, see figure 1 , the specific steps are:

[0046] Step [1] Obtain the model of the patient's teeth and gums through the computer, and determine the positional relationship between the two;

[0047] Step [2] Selecting feature points in the gingival model, and recording the initial coordinate values ​​of the feature points; the feature points include control points, deformable points and fixed po...

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Abstract

The invention discloses a method for simulating gum deformation. The method mainly includes the steps: determining a control point, a deformation point and a fixed point on a gum model; calculating Laplace expressions of the control point, the deformation point and the fixed point; calculating a rotated value of the Laplace expression of each point by the aid of a Laplace deformation equation anda rotated matrix of each point, performing repeatedly iterating to calculate coordinates of points after deformation; updating the coordinates of the points after deformation into the gum model. According to the method, micro-details of the gum model can be kept in the deformation process of the gum model, and the deformed gum model is more real.

Description

technical field [0001] The invention belongs to the field of dental invisible correction, and relates to a method for simulating deformation of gums. Background technique [0002] With the continuous improvement of people's material living standards, the cleanliness of teeth is regarded as an important part of grooming, and has attracted public attention. Under the trend of the orthodontic market gradually shifting from young to adult, invisible aligners meet people's aesthetic needs in the orthodontic process. Due to the different gingiva shapes of each patient, in the process of computer virtual design of invisible braces, it is necessary to simulate the deformation of each individual's gingiva to achieve personalized customization. In this deformation process, it is of great significance to preserve the detailed information of the patient's own gums. [0003] For the deformation research of the model, there are mainly three ways: finite element model, mass spring model ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C7/00G06T17/00
CPCA61C7/002G06T17/00
Inventor 王静王晶卢秉恒王亚芳
Owner NAT INST CORP OF ADDITIVE MFG XIAN
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