Gingival generating method used for bracketless orthodontic treatment

A technology for gums and orthodontics, applied in the field of three-dimensional image processing, can solve problems such as errors, aligner extrusion, and the increase in the number of triangular pieces, and achieve the effect of reducing the size

Active Publication Date: 2017-03-15
QINGDAO LANXIN MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The virtual model is a method to completely regenerate the shape of the gums based on the key points or gum lines marked by the user on the teeth. The advantage is that the number and shape of the triangular pieces can be controlled, but because it is completely irrelevant to the patient's real gums, doctors cannot observe the patient's gums. Gum and Periodontal Health
In addition, when the patient's gum condition is special, the appliance may squeeze or poke the gum, causing the patient to wear uncomfortable
The completely realistic model is a method to directly convert the patient's plaster model into a virtual gingiva, which is simple and convenient, and truly reflects the patient's gingiva condition, avoiding the situation where the appliance squeezes the patient's gingiva, but the volume of the general plaster model Larger (larger if equipped with a base), resulting in a rapid increase in the number of triangular pieces, and the shape of the triangular pieces cannot be predicted, which may cause unexpected errors

Method used

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  • Gingival generating method used for bracketless orthodontic treatment
  • Gingival generating method used for bracketless orthodontic treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method of gum generation for orthodontics without brackets, including the following steps:

[0026] (1) Scan the tooth model to obtain the 3D model of the tooth model, set the positive direction of the tooth model and position the model upright; if some models of 3D scanners have their own adjustment function, you can omit the step of positioning the tooth model upright .

[0027] (2) Divide the gingival and tooth parts that need to be preserved in the three-dimensional model, and save the divided edges in sequence; after this step, the gingival morphology of the small area near the root of the tooth can be obtained with retention value, so that the doctor can observe the patient’s gums and Periodontal health.

[0028] (3) Extend all points on the edge of the segmentation along the negative direction of the Z-axis or the projection direction of the points on the edge of the negative Z-axis to obtain the intersection with the designated bottom surface, thereby obtaining the ...

Embodiment 2

[0034] A method of gum generation for orthodontics without brackets, including the following steps:

[0035] (1) Scan the tooth model to obtain a three-dimensional model of the tooth model, set the positive direction of the tooth model and position the model upright;

[0036] (2) Divide the gingiva and tooth parts that need to be preserved in the 3D model, and save the divided edges in sequence;

[0037] (3) Extend all points on the edge of the segmentation along the negative direction of the Z axis or the projection direction of the points on the edge of the negative direction of the Z axis to obtain the intersection with the designated bottom surface, thereby obtaining the contour line of the gingival bottom surface;

[0038] (4) Sampling uniformly on the contour line of the bottom surface of the gums to obtain the sampling width of the bottom surface of the gums and the average distance from the bottom surface of the gums to the segmentation edge, and calculate the number of layers;...

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Abstract

The invention relates to the three-dimensional image processing technology field, especially relates to a gingival generating method used for bracketless orthodontic treatment. The gingival generating method comprises steps that (1) a positive direction of a teeth model is set, and the model is arranged in a forward direction; (2) the teeth model is scanned to acquire the three-dimensional model of the teeth model, and the gingival part and the teeth part of the three-dimensional model, which are required to be kept, are segmented, and segmented edges are sequentially stored; (3) the points of all of the segmented edges are respectively extended along a Z axis negative direction or along the projection directions of the Z axis negative direction of the points of the edges to acquire the intersected points with a specific bottom surface, and therefore the contour line of the bottom surface of the gingival is acquired; (4) uniform sampling is carried out on the contour line of the bottom surface of the gingival, and therefore the width of the bottom surface of the gingival and distances between the bottom surface of the gingival and the segmented edges are acquired, and a number of layers is calculated; (5) the number of the sampling points of the bottom surface is calculated, and the contour points of every layer are sequentially generated according to the calculation result of the step (4); (6) the contour points of every layer are used to reconstruct triangular surfaces, and the gingival is acquired. By adopting the gingival generating method provided by the invention, the original form of the gingival of the key part is maintained, and the number of the triangular surfaces is reduced as much as possible, and then the size of the model is reduced.

Description

Technical field [0001] The present invention relates to the technical field of three-dimensional image processing, in particular to a method for generating gums for orthodontics without brackets. Background technique [0002] In bracketless invisible orthodontics, the three-dimensional data of the teeth is transferred to the computer for virtual alignment; in this process and subsequent 3D printing, the virtual gums provide support for the teeth. [0003] Among the current common products, there are two gingival generation schemes in mainstream use: virtual models and completely real models. The virtual model is a method to completely regenerate the shape of the gums based on the key points or gum lines marked on the teeth by the user. The advantage is that the number and shape of the triangles are controllable, but because it is completely independent of the patient’s real gums, the doctor cannot observe the patient’s Gum and periodontal health. In addition, when the patient's g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T19/00
CPCG06T17/00G06T19/006
Inventor 于昊刘继敏王凯
Owner QINGDAO LANXIN MEDICAL TECH CO LTD
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