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A Restoration Algorithm for Single Teeth Mesh Model

A mesh model, tooth model technology, applied in prosthodontics, dentistry, orthodontics and other directions, can solve problems affecting production efficiency and so on

Active Publication Date: 2020-10-20
HANGZHOU MEIQI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the existing scanning technology, the information of the adjacent surface between adjacent teeth and the root that cannot penetrate the light cannot be obtained directly through scanning, so the scanned model needs to be repaired
Most of the existing tooth model restoration algorithms need to manually determine the repair area, manually adjust the curvature of the repair plane, etc., which affects the production efficiency, so a more automatic and fast repair algorithm is needed to improve production efficiency

Method used

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  • A Restoration Algorithm for Single Teeth Mesh Model
  • A Restoration Algorithm for Single Teeth Mesh Model
  • A Restoration Algorithm for Single Teeth Mesh Model

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] Such as figure 1 As shown, the algorithm implementation process of the present invention is as follows:

[0042] 1) Input 3D tooth models, which can be obtained by scanning plaster, silicone rubber impressions, or directly by scanning the oral cavity. The format of the tooth 3D model can be various, such as STL, OBJ, CTM, OFF, JSON, etc. Such as figure 2 As shown, the original tooth model is missing part of the tooth side and complete root.

[0043] 2) Fix the axis of the tooth mesh model, such as image 3 As shown, when the teeth are in the standard position, the mesiodistal is set as the X axis, the buccal and lingual side is set as the Y axis, the occlusal direction is set as the Z axis, and the direction from the gingiva to the crown is the positive direction of the Z axis.

[0044] 3) if Figure 4 As shown in , the ...

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Abstract

The invention discloses a repairing algorithm for a single tooth mesh model. The repairing algorithm comprises the following steps: inputting the single tooth mesh model missing part of the side edgeof a tooth and a complete tooth root; fixing the axis of the tooth mesh model; expanding the tooth mesh model by using the local coordinates of the tooth, obtaining a repairing boundary point set of the tooth model; processing the repairing boundary point set through a three-dimensional point cloud reconstruction algorithm to obtain a preliminary repairing model of the tooth; and repairing the preliminary repairing model of the tooth according to the original tooth mesh model. Compared with the traditional manual repairing algorithm, the tooth model is fully automatically repaired, the production efficiency is improved, and the noise information of the input model is better filtered.

Description

technical field [0001] The invention belongs to the technical field of grid model data processing and model repair, and in particular relates to a repair algorithm of a single tooth grid model. Background technique [0002] In recent years, digital oral technology has developed rapidly and is widely used in orthodontics, implants and other fields. Among them, it is the first and important step to obtain a digital model of the patient's jaw by using a box-type or intraoral scanner. However, due to limitations of the existing scanning technology, the information of the adjacent surfaces between adjacent teeth and tooth roots and other areas where light cannot penetrate cannot be obtained directly through scanning, so the scanned model needs to be repaired. Most of the existing tooth model restoration algorithms need to manually determine the repair area, manually adjust the curvature of the repair plane, etc., which affects the production efficiency. Therefore, a more automat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C7/00
CPCA61C7/002
Inventor 宋雷王启超王春蝶宣梦洁
Owner HANGZHOU MEIQI TECH CO LTD
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