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Method and system for extracting dental arch curve of tooth three-dimensional point cloud model

A three-dimensional point cloud and dental arch curve technology is applied in the field of extracting dental arch curves to achieve the effects of automatically fitting dental arch curves, reducing repetitive labor and easy operation.

Pending Publication Date: 2021-03-26
成都玻尔兹曼智贝科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a method and system for extracting the dental arch curve of the three-dimensional point cloud model of teeth, and solve the shortcomings of the existing dental arch curve extraction method

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  • Method and system for extracting dental arch curve of tooth three-dimensional point cloud model

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the application provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in ...

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Abstract

The invention relates to a method and a system for extracting a dental arch curve of a tooth three-dimensional point cloud model. The method comprises the steps: abstracting each point in inputted disordered three-dimensional point cloud data into a vertex of a graph through a dynamic convolution neural network based on the graph, and enabling the vertex to be connected with a point in a neighborhood of the vertex through a vector of an edge; integrating neighborhood information through pooling processing, and then outputting a key anatomical mark point result; extracting discrete mandibular tooth key anatomical mark points, and determining an occlusion plane according to a fitting plane equation Ax+By+Cz+D = 0; adopting euclidean distances from two key points at the buccal tangent end ofeach tooth to the curve as a minimization function, and continuously adjusting each parameter of the curve to generate a dental arch curve conforming to the tooth arrangement condition. The method hasthe advantages that the key anatomical structure of the tooth three-dimensional point cloud data can be automatically positioned, the number of required training data sets is small, positioning is accurate, the generalization performance is high, and repeated work of doctors is reduced. visual manual adjustment is supported, operation is easy and convenient, and automatic fitting of the dental arch curve can be achieved.

Description

technical field [0001] The invention relates to a method for extracting a dental arch curve, in particular to a method and system for extracting a dental arch curve of a tooth three-dimensional point cloud model. Background technique [0002] In the diagnosis and treatment of malocclusion, it is necessary to identify, analyze and measure specific anatomical structures; among them, the dental arch curve is an important basis for guiding the personalized arrangement of teeth according to the alveolar bone; traditional extraction methods include WALA crest (attachment) The most convex point on the soft tissue at the junction of the gingiva and alveolar mucosa is in the same plane as the tooth rotation center) hand-drawn and CBCT extraction; however, these arch curve extraction methods are mainly based on plaster models or the two-dimensional image interface of CBCT, the operation is complicated and the error is large. Big. [0003] Intraoral scanning equipment uses structured ...

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Application Information

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IPC IPC(8): G06T17/20
CPCG06T17/20
Inventor 包雷李娟秦睿代光胜林昱澄
Owner 成都玻尔兹曼智贝科技有限公司
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