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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: 2011-05-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, the three-dimensional dental model is quantitatively analyzed and divided into regions, and the method based on space polygons is used to accurately determine the fusion area between the teeth on the three-dimensional dental model. Extract and delete. According to the hole boundary information and boundary constraint conditions generated after deleting the fusion part between teeth, a surface patch that can simultaneously reflect the local characteristics of the corresponding tooth part and maintain the natural continuous transition between the teeth is constructed; the surface patch after the shape restoration should be The mesh density (average side length of the model) is similar to that of the original three-dimensional dental jaw model, and it has a good degree of fidelity. There can be no interference between single teeth, which is in line with the r...

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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, constructinga 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, a method for accurately restoring the shape of a single tooth on a three-dimensional dental jaw model, relates to computer image graphics, orthodontics, and belongs to the field of computer-aided biomedical engineering. Background technique [0002] With the development of computer technology, three-dimensional dental jaw models can be easily obtained through intraoral or extraoral measurement techniques. Due to the overlap and interference between the teeth caused by oral deformities, the accuracy of the measuring equipment and the lower resolution of the curved surface reconstruction method, the adjacent teeth of the three-dimensional dental model are fused together, and there is no clear gap between the teeth. In the dental restoration CAD / CAM system, from the production of inlays, veneers, full crowns, partial crowns, simple fixed bridges, and complete dentures, all of them need to be independent of each other and retain the origi...

Claims

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Application Information

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Patent Type & Authority Patents(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