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Method for accurately recovering single tooth form on three-dimensional tooth-mandible model

A tooth model and tooth technology, applied in the field of computer-aided biomedical engineering, to achieve the effect of stable and accurate restoration of the algorithm

Inactive Publication Date: 2009-12-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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Problems solved by technology

There is no systematic solution for the restoration of the shape of a single tooth in a 3D dental model in the existing methods or literature

Method used

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  • Method for accurately recovering single tooth form on three-dimensional tooth-mandible model
  • Method for accurately recovering single tooth form on three-dimensional tooth-mandible model
  • Method for accurately recovering single tooth form on three-dimensional tooth-mandible model

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Embodiment Construction

[0034] The core idea of ​​the present invention is: according to the physiological and medical characteristics of the teeth, quantitatively analyze the biological characteristics and divide the three-dimensional jaw model, and use the method based on spatial polygons to accurately determine the fusion area between the teeth on the three-dimensional jaw model. Extract, delete. According to the hole boundary information and boundary constraints generated after the interdental fusion part is deleted, a surface patch that can reflect the local characteristics of the corresponding tooth part and maintain the natural continuous transition between the teeth is constructed; the surface patch after shape recovery should be It has a similar grid density (average side length of the model) to the original three-dimensional dental model, and has a good degree of fidelity. There can be no interference between single teeth, and it conforms to the relative spatial position relationship between...

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Abstract

The invention discloses a method for accurately recovering a single tooth form on a three-dimensional tooth-mandible model, and belongs to the field of computer-aided biomedical engineering. The method mainly comprises the following steps: (1) identifying and deleting a fusion part between teeth; and (2) according to hole boundary information generated after deleting the fusion part, constructing a curved surface sheet which accords with a practical spatial position relation between the teeth and can synchronously reflect local characteristics of corresponding tooth parts. The method of the invention only comprises simple human-computer interaction operation, has high automation degree, mainly carries out linear computation, can quickly, stably and accurately recover the form of a deletion part of the single tooth on the three-dimensional tooth-mandible model, and has important application value in the field of computer-aided oral orthodontics.

Description

Technical field [0001] The present invention is a method for accurately restoring the shape of a single tooth on a three-dimensional dental model, which relates to computer graphics and orthodontics, and belongs to the field of computer-aided biomedical engineering. Background technique [0002] With the development of computer technology, three-dimensional tooth and jaw models can be easily obtained through intraoral or extraoral measurement techniques. Due to the overlapping interference between the teeth caused by oral deformity, the accuracy of the measurement equipment and the low resolution of the surface reconstruction method, the adjacent teeth of the 3D jaw model are fused together, and there is no clear gap between the teeth. In the oral restoration CAD / CAM system, from the production of inlays, veneers, full crowns, partial crowns, simple fixed bridges and even complete dentures, it is necessary to have a single tooth model that is independent of each other and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 戴宁袁天然俞青程筱胜胡勤刚廖文和陆苇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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