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Automatic complete tooth reconstruction method based on multi-modal data registration

A data allocation and multi-modal technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problem of inequity in reconstruction models

Inactive Publication Date: 2021-06-08
HANGZHOU MEIQI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can solve the problem of incorrect reconstruction model caused by the occlusal relationship of the upper and lower jaws, and the use of the crown surface mesh model can omit the manual labeling process, and automatically perform image segmentation, reconstruction, and final crown replacement, model restoration, and smoothing

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  • Automatic complete tooth reconstruction method based on multi-modal data registration
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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] Such as figure 1 Shown, the present invention comprises the following steps:

[0044] The crown surface mesh model M0 is obtained by scanning and reconstructing an intraoral scanner or by scanning and reconstructing a plaster model.

[0045] 1) if figure 2 and 3 As shown, the crown surface mesh model M0 and CBCT data are collected at the same time, and a crown surface mesh model M0 and CBCT data are registered, so that the crown surface mesh model M0 and CBCT data are carried out in the world coordinate system Overlap, obtain the registered crown surface mesh model M0 and CBCT data respectively, such as Figure 4 shown;

[0046] In step 1), a crown surface grid model M0 and CBCT data are registered, so that the crown surface grid model M0 and CBCT data are overlapped in the world coordinate system, and the registered crown ...

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Abstract

The invention discloses an automatic complete tooth reconstruction method based on multi-modal data registration. The method comprises the following steps: (1) registering a dental crown surface grid model and CBCT data which are acquired at the same time, and respectively obtaining the registered dental crown surface grid model and CBCT data; 2) processing each tooth model in the dental crown surface grid model to obtain an eight-communication dental crown boundary pixel point set; 3) according to the dental crown boundary pixel point set, performing image segmentation on the CBCT data by using an image segmentation algorithm to obtain a tooth boundary pixel point set of each layer; 4) performing three-dimensional reconstruction on the tooth boundary pixel point set of each layer to obtain a complete tooth three-dimensional surface grid model; and 5) processing the complete tooth three-dimensional surface grid model by using the grid boundary point set of the registered dental crown surface grid model to obtain the complete tooth three-dimensional surface grid model of the dental crown part. Automatic reconstruction of the complete tooth is realized, and the complete tooth has a dental crown part and a complete tooth root.

Description

technical field [0001] The invention relates to a complete tooth reconstruction method, in particular to an automatic complete tooth reconstruction method based on multimodal data registration. Background technique [0002] The complete tooth model reconstruction technology based on CBCT data is relatively mature, and most of them are optimized on the basis of image segmentation and 3D reconstruction. However, using CBCT data alone to reconstruct teeth will cause the following problems: [0003] 1. Due to the occlusal relationship between the upper and lower jaws, the crown part cannot accurately separate the upper and lower jaws during image segmentation, and often the upper and lower teeth cannot be separated, which leads to the final reconstructed model being completely wrong; [0004] 2. The image segmentation of CBCT requires the information of the initial layer and the initial point set, which usually requires manual annotation by professionals, which is time-consuming...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T7/12G06T7/00
CPCG06T17/00G06T7/0012G06T7/12G06T2207/10012G06T2207/30036
Inventor 宁楠林海高源钱驾宏卢诗娟陶煜波
Owner HANGZHOU MEIQI TECH CO LTD
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