Teeth modeling method based on three-dimensional model retrieval

Abstract

The invention discloses a tooth modeling method based on three-dimensional model retrieval. According to the method, three-dimensional retrieval technology is utilized for searching a teeth model with a dental crown which is similar with a to-be-modeled dental crown, and modeling is finished through three-point translation conversion registration, cutting and splicing. For reducing a workload in retrieval, the invention provides a teeth type identification method based on area segmentation, wherein area segmentation is performed through analyzing dental crown characteristic differences of different types of permanent teeth. Dental crown type identification and classification are realized according to a curved surface characteristic of the dental crown, thereby performing retrieval on different types of dental crowns. The teeth modeling method has advantages of simple operation and high modeling effect.

Description

technical field [0001] The invention belongs to the field of image processing and relates to an application of three-dimensional model retrieval in tooth modeling. Background technique [0002] With the continuous development of science and technology, computer graphics and image processing technology has been widely used. The cross-integration and mutual penetration of computer technology and orthodontics makes the computer-aided orthodontic system emerge as the times require. [0003] Computer-aided orthodontics system is to use computer graphics, graphic image processing and analysis technology to carry out computer-aided design, manufacture and analysis of orthodontics, so that doctors can more intuitively observe tooth deformity and tooth occlusal relationship, through human The teeth are operated in a computer-interactive way, which makes the measurement and analysis of some complex feature quantities easier. [0004] Influenced by the visualization of human body dat...

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Problems solved by technology

Xu Mingzhi and others used 3D laser scanning to build tooth models. Although 3D laser scanners can automatically locate the scanned point data at different angles accurately, the scanning can only obtain the surface data of the model, and they do not know the information about the internal structure. , scan blind areas can appear in the undercut and large slope parts of the model (Xu Mingzhi, Wang Yanyi, Xu Xin use 3D laser scanning technology to establish a 3D finite element model of mandibular fixed dentures [J]. Stomatology Research. 2006, 22 (2): 159-161)

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