Tooth segmentation method and device

A technique for teeth and crowns, applied in the field of tooth segmentation methods and devices, capable of solving problems such as inaccurate automatic tooth segmentation

Active Publication Date: 2018-10-12
北京正齐口腔医疗技术有限公司
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Problems solved by technology

[0004] In view of this, the tooth segmentation method and device provided by the present invention are mainly aimed at how to solve the problem of inaccurate automatic tooth segmentation in the prior art

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  • Tooth segmentation method and device

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Embodiment Construction

[0033] Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present application can be more thoroughly understood, and the scope of the present application can be fully conveyed to those skilled in the art.

[0034] The embodiment of the present invention provides a tooth segmentation method, such as figure 1 As shown, the method mainly includes:

[0035] 101. Acquire the registered average dentition grid model, the scanned crown grid model, and the scanned CBCT volume data.

[0036] Wherein, the average dentition mesh model is obtained by reconstructing a three-dimensional tooth mesh model from the correctly segment...

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Abstract

The invention discloses a tooth segmentation method and a tooth segmentation device, relating to the oral field and capable of solving the problem of imprecise automatic teeth segmentation. The methodcomprises: obtaining the registered average dentition mesh model, the scanned crown mesh model and the scanned CBCT volume data; determining the projection point satisfying the specific condition inthe projection point of the vertices of the average tooth mesh model on the registered scanned crown mesh model along the vertex normal orientation as the ideal position of the vertex; sampling the region formed by moving the vertices on the root of the average tooth mesh model along forward and backward directions for specific distance, finding the point located closest to the tooth boundary in the volume data from the sampling points as the ideal position of the vertex; calculating the ideal positions of the other vertices by fixing the ideal position of the vertex with the ideal position and the Laplacian coordinates of the other vertices; and performing tooth segmentation on the volume data by the optimized energy function method based on the ideal position. The invention is suitable for scenes where automatic tooth segmentation is performed on CBCT images.

Description

technical field [0001] The invention relates to the field of oral cavity technology, in particular to a tooth segmentation method and device. Background technique [0002] With the advancement of science and technology, the method of obtaining dental images has gradually developed from traditional computed tomography (CT) technology to cone beam computed tomography (CBCT) technology. Segmentation can obtain a three-dimensional mesh model of teeth, thereby helping doctors to make more accurate judgments on tooth conditions. [0003] At present, the tooth segmentation functions provided by existing commercial software such as Amira and Mimics require a lot of human-computer interaction, which results in a long time-consuming tooth segmentation. The main implementation method of the tooth automatic segmentation method proposed in the research field is: using the density texture difference between the tooth and the surrounding tissue, each voxel in the CBCT volume data is regar...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T19/20G06T7/10G06T7/30G06T5/50
CPCG06T5/50G06T7/10G06T7/30G06T19/20G06T2207/30036G06T2207/10012G06T2207/10081
Inventor 陈莉王昭
Owner 北京正齐口腔医疗技术有限公司
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