Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (5): 128-134.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Rapid Extraction of Dental Preparation Line

Dai Ning1  Zhou Yong-yao2  Yuan Tian-ran1  Yu Qing3  Liao Wen-he1  Sun Quan-ping1   

  1. 1.College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China;2.66 Vision-Tech Corporation Limited,Suzhou 215005,Jiangsu,China;3.Department of Prosthodontics,Nanjing Stomatological Hospital,Nanjing 210008,Jiangsu,China
  • Received:2007-06-04 Revised:2007-09-09 Online:2008-05-25 Published:2008-05-25
  • Contact: 戴宁（1978-），男，博士，讲师，主要从事CAD／CAM、生物医学工程方面的研究． E-mail:dai_ning@nuaa．edu．cn
  • About author:戴宁（1978-），男，博士，讲师，主要从事CAD／CAM、生物医学工程方面的研究．
  • Supported by:

    教育部博士点基金资助项目（20070287055）;江苏省科技攻关项目（BE2005014）;江苏省博士后科研资助项目（0701051B）;江苏省数字化制造技术重点建设实验室开放课题（HGDML-0609）

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Abstract:

The extraction of dental preparation line is one of the key steps that affects the marginal adaptation in dental CAD/CAM and is very important to the restoration quality and the protection of periodontal tissues.This paper proposes a semi-automatic extraction algorithm of dental preparation line.In this algorithm,the discrete curvature of the triangle mesh in the dental model is analyzed and estimated,and an initial preparation line is extracted by means of the direction tracking method.Then,the initial preparation line is optimized by means of the ＂curvature attraction＂ based on the minimum energy principle.Case study demonstrates that the proposed algorithm is effective and feasible.

Key words: preparation line, dental CAD/CAM, contour detection