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Automatic tooth undercut filling printing method based on tooth feature points

A technology of automatic filling and feature points, which is applied in dentistry, orthodontics, dental prosthetics, etc., can solve the problems of hard to take out the positive mold of the teeth, lack of tooth undercuts, and difficult to wear, etc., to achieve the convenience of molding work and the degree of automation High, less manual operation effect

Active Publication Date: 2019-07-12
HANGZHOU MEIQI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of the undercut area, it will be difficult to take out the positive mold of the tooth after the mold is completed, and it will make the patient uncomfortable or difficult to wear the invisible aligner.
[0004] Since the triangular area formed by the two teeth and the edge of the gums is mostly concave relative to the teeth, it is difficult to remove the positive mold film after the teeth are pressed, and it will cause discomfort for the patient wearing the invisible aligner, and the undercut area needs to be filled The problem
At present, manual undercut filling is mostly used for filling undercuts. The filling amount of artificial undercuts is not easy to control, which may affect the orthodontic effect of orthodontic appliances.
Therefore, there is a lack of an automatic filling method for tooth undercuts combined with 3D printing technology in the prior art

Method used

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  • Automatic tooth undercut filling printing method based on tooth feature points
  • Automatic tooth undercut filling printing method based on tooth feature points
  • Automatic tooth undercut filling printing method based on tooth feature points

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Experimental program
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Embodiment Construction

[0050] The present invention will be further described in detail below in conjunction with the drawings and embodiments of this specification.

[0051] First, obtain a digital tooth model: In order to obtain a tooth model, firstly, it is necessary to obtain a plaster model of the jaw through occlusal silicone rubber, and then obtain the three-dimensional data of the jaw by optically scanning the plaster model, and then perform digital segmentation on the model of the jaw. The final teeth are numbered and named to facilitate later operations. The digital oral system provides data support for 3D printing invisible aligners and later orthodontic treatment programs by establishing digital tooth models.

[0052] Secondly, import the digital tooth model into the 3D printer, and determine the direction of the Z axis such as figure 1 shown.

[0053] Such as figure 2 As shown, extract the feature points of each tooth: select buccal distal mastoid point a1, lingual distal mastoid po...

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Abstract

The invention discloses an automatic tooth undercut filling printing method based on tooth feature points. The method comprises the steps that according to a collected plaster tooth jaw model, a digital three-dimensional tooth jaw model is obtained, the feature point of each tooth are extracted, and according to the feature points, the lower undercut control point of each tooth is obtained; each tooth is subjected to horizontal splicing many times in the direction perpendicular to the occlusal plane to obtain the widest tooth plane of the corresponding tooth; according to the widest tooth plane and the lower undercut control point of each tooth, corresponding upper undercut control points are obtained; according to the undercut control points of two adjacent teeth, the undercut area between the two teeth is obtained, the undercut areas are subjected to digital undercut filling to obtain a final three-dimensional tooth jaw model, and the final three-dimensional tooth jaw model is inputinto a 3D printer and printed. By means of the method, automatic tooth undercut filling can be completed while an orthodontic brace is hidden during 3D printing, filling is quick and precise, and theundercut control points can be controlled.

Description

technical field [0001] The invention relates to a tooth undercut filling method, in particular to an undercut automatic filling method based on a digital tooth model of tooth feature points. Background technique [0002] In recent years, with the development of technology and the widespread application of 3D printing technology, digital oral cavity has become more and more popular, and invisible orthodontics has also been recognized and used by more and more people. Compared with the traditional bracket orthodontic technology, the invisible orthodontic technology is based on the digital oral system, does not require brackets and steel wires, and is beautiful and easy to remove. Specifically, invisible aligners are a set of polymer shells with cavities inside that hold teeth. This shell is made of safe elastic polymer material by hot pressing the 3D printed resin tooth positive mold, and its high elasticity makes the tooth reach the required correction state. [0003] Befor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C7/00
CPCA61C7/00A61C7/002
Inventor 郑肖勇王启超宋雷宁楠王春蝶陈敏宣梦洁
Owner HANGZHOU MEIQI TECH CO LTD
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