Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Finite Element Analysis of Incisors with Different Material Combinations of a Post and a Core

기둥(Post)과 핵(Core)의 이종재료 조합에 의한 치아의 유한요소해석

  • Kang, Min-Kyu (Department of Mechanical Engineering, Gyeongsang Univ.) ;
  • Tak, Seung-Min (Department of Mechanical Engineering, Gyeongsang Univ.) ;
  • Lee, Seok-Soon (Department of Mechanical Engineering, Gyeongsang Univ.) ;
  • Seo, Min-Seock (School of Dentistry, Seoul Univ.) ;
  • Kim, Hyo-Jin (Department of Aeronautical Engineering, Korea Aviation Polytechnic College)
  • 강민규 (경상대학교 기계항공공학부) ;
  • 탁승민 (경상대학교 기계항공공학부) ;
  • 이석순 (경상대학교 기계항공공학부) ;
  • 서민석 (서울대학교 치의학대학원) ;
  • 김효진 (항공기능대학교 항공기계과)
  • Received : 2010.09.17
  • Accepted : 2011.01.19
  • Published : 2011.04.01
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Abstract

The purpose of this study was to investigate the effect of rigidity of post core systems on stress distribution by the finite element stress analysis method. Three-dimensional finite element models simulating an endodontically treated maxillary central incisor restored with a zirconia crown were prepared. Each model contained cortical bone, trabecular bone, periodontal ligament, 4mm apical root canal filling, and post-and-core. A 50N static occlusal load was applied to the palatal surface of the crown with a $60^{\circ}$ angle to the long axis of the tooth. And three parallel type post (zirconia, glass fiber and stainless steel) and two core (Paracore and Tetric ceram) materials were evaluated, respectively. The differences in stress transfer characteristics of the models were analyzed. von Mises stresses were chosen for presentation of results and maximum displacement and hydrostatic pressure were also calculated. For the Result of the research, the model applied glass fiber to post material has lowest von Mises stress and it is suitable for material of post core systems.

Keywords

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