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Tooth body model generation method and system based on oral cavity CBCT and oral cavity scanning data

A technology of model generation and crown model, which is applied in the field of medical image processing, can solve problems such as low accuracy, difficulty in meeting needs, and interference in clinical diagnosis and treatment, and achieve the effect of less data, ensuring accuracy and stability, and high computing efficiency

Active Publication Date: 2021-09-17
朱涛
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the traditional point cloud segmentation or threshold segmentation mode, the roughness of the obtained model segmentation cannot be solved. In the extremely small range of the oral cavity, it interferes a lot with clinical diagnosis and treatment, and it is difficult to meet the needs.
In addition, the joint between the tooth root and the crown itself is the boundary of distinction, and there may be certain errors in the acquisition of CBCT data and oral scan data, so the accuracy of fusion here is relatively low

Method used

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  • Tooth body model generation method and system based on oral cavity CBCT and oral cavity scanning data
  • Tooth body model generation method and system based on oral cavity CBCT and oral cavity scanning data
  • Tooth body model generation method and system based on oral cavity CBCT and oral cavity scanning data

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1: The dental model generation method based on oral cavity CBCT and oral scan data, such as figure 1 and figure 2 shown, including the following steps:

[0063] S1: Based on the CBCT original image data, establish a tooth model with landmarks marked and in point cloud format;

[0064] S2: Based on the oral scan data, establish a crown model with marked landmarks in point cloud format;

[0065] S3: The tooth model is used as a floating model and the crown model is used as a fixed model by principal component analysis method for preliminary translation and combination, and the transformation process is carried out according to the minimum distance between all corresponding landmarks in the tooth model and crown model, and the obtained Match fusion model;

[0066] S4: Delete the matching and overlapping CBCT original image data in the matching fusion model to realize model trimming, and automatically adjust the trimmed model through a pre-trained autoencoder...

Embodiment 2

[0092] Embodiment 2: The dental model generation system based on oral cavity CBCT and oral scan data, such as Figure 4 As shown, the method can implement the method described in Embodiment 1, including a first model module, a second model module, a model fusion module, and a model correction module.

[0093] The first model module is configured to establish a dental model in a point cloud format with marker points marked according to the original CBCT image data. The second model module is used to establish a dental crown model in a point cloud format based on the oral scan data. The model fusion module is used to use the principal component analysis method to take the tooth model as a floating model and the crown model as a fixed model for preliminary translation and merging, and perform the fusion according to the minimum distance between all corresponding landmark points in the tooth model and the crown model. Transform processing to obtain a matching fusion model. The m...

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Abstract

The invention discloses a tooth body model generation method and system based on oral cavity CBCT and oral cavity scanning data, and relates to the technical field of medical image processing. The key points of the technical scheme of the tooth body model generation method are as follows: establishing a tooth body model which finishes mark point labeling and is in a point cloud format according to CBCT original image data; according to the oral cavity scanning data, establishing a dental crown model which finishes the mark point labeling and is in the point cloud format; taking the tooth body model as a floating model and the dental crown model as a fixed model through a principal component analysis method to carry out preliminary translation merging, and carrying out transformation processing according to a minimum distance among all the corresponding mark points in the tooth body model and the dental crown model to obtain a matching fusion model; and deleting matched and overlapped CBCT original image data in the matching fusion model to realize model finishing, and automatically adjusting the finished model through a pre-trained auto-encoder to obtain a complete tooth model. According to the tooth body model generation method, the dentition position can be quickly and accurately calibrated, a relative error is small, and operand is effectively reduced.

Description

technical field [0001] The present invention relates to the technical field of medical image processing, more specifically, it relates to a tooth model generation method and system based on oral cavity CBCT and oral scan data. Background technique [0002] With the continuous improvement of people's living standards in our country and the concern for oral health, the people's demand for high-quality oral medical services is increasing, and digital oral diagnosis and treatment are being used by more and more Accepted by dental practitioners. In dental digital diagnosis and treatment, the construction of tooth models plays a vital role in promoting the development of oral digitalization. This aspect has extremely high practical value. [0003] At present, cone-beam computed tomography (CBCT) is developing rapidly in the dental field due to its advantages of low radiation dose, simple operation, short scanning time, high resolution, and clear display. It can show the structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/14A61B6/03G06N3/02G06N3/08G06T7/11G06T17/00A61B6/51
CPCA61B6/032A61B6/4085A61B6/5211G06T17/00G06T7/11G06N3/02G06N3/08G06T2207/10028G06T2207/30036A61B6/512
Inventor 朱涛马鑫然袁雪纯叶树衡朱淑琳
Owner 朱涛