Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Effects of occlusal load on the cervical stress distribution: A three-dimensional finite element study

교합하중이 치경부 응력분포에 미치는 영향에 관한 3차원 유한요소법적 연구

  • Lee, Hyeong-Mo (Department of Conservative dentistry, College of Dentistry, Pusan National University) ;
  • Hur, Bock (Department of Conservative dentistry, College of Dentistry, Pusan National University) ;
  • Kim, Hyeon-Cheol (Department of Conservative dentistry, College of Dentistry, Pusan National University) ;
  • Woo, Sung-Gwan (Department of Mechanical design engineering, College of Engineering, Pusan National Univeristy) ;
  • Kim, Kwang-Hoon (Department of Mechanical design engineering, College of Engineering, Pusan National Univeristy) ;
  • Son, Kwon (Department of Mechanical design engineering, College of Engineering, Pusan National Univeristy) ;
  • Park, Jeong-Kil (Department of Conservative dentistry, College of Dentistry, Pusan National University)
  • 이형모 (부산대학교 치과대학 치과보존학교실) ;
  • 허복 (부산대학교 치과대학 치과보존학교실) ;
  • 김현철 (부산대학교 치과대학 치과보존학교실) ;
  • 우성관 (부산대학교 공과대학 기계설계공학과) ;
  • 김광훈 (부산대학교 공과대학 기계설계공학과) ;
  • 송권 (부산대학교 공과대학 기계설계공학과) ;
  • 박정길 (부산대학교 치과대학 치과보존학교실)
  • Published : 2006.11.30
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Abstract

The objective of this study was to investigate the effects of various occlusal loads on the stress distribution of the buccal cervical region of a normal maxillary second premolar, using a three dimensional fnite element analysis (3D FEA). After 3D FE modeling of maxillary second premolar, a static load of 500N of three load cases was applied. Stress analysis was performed using ANSYS (Swanson Analysis Systems, Inc., Houston, USA). The maximum principal stresses and minimum principal stresses were sampled at thirteen nodal points in the buccal cervical enamel for each four horizontal planes, 1.0 mm above CEJ, 0.5 mm above CEJ, CEJ, 0.5 mm under CEJ. The results were as follows 1. The peak stress was seen at the cervical enamel surface of the mesiobuccal line angle area, asymmetrically. 2. The values of compressive stresses were within the range of the failure stress of enamel. But the values of tensile stresses exceeded the range of the failure stress of enamel. 3. The tensile stresses from the perpendicular load at the buccal incline of palatal cusp may be shown to be the primary etiological factors of the NCCLs.

본 연구의 목적은 3차원유한요소분석법을 이용하여 정상 상악 제2소구치의 협측부의 응력분포에 다양한 교합응력이 미치는 영향을 평가하고자 하였다. 상악 제2소구치의 3차원유한요소모델을 형성한 후 형성된 모델에 3종류의 정적인 500N 점하중의 응력조건을 부여하였다. ANSYS 프로그램 (Swanson Analysis Systems, Inc., Houston, USA)으로 최대주응력과 최소주응력을 4개의 수평면 상(CEJ 상방 1 mm, CEJ 상방 0.5 mm, CEJ, CEJ 하방 0.5 mm)에서 분석하여 다음 결과를 얻었다. 1. peak stress가 협측 백악법랑경계를 따라 비대칭적인 모습으로 나타났다. 2. 압축응력 값은 법랑질의 압축파괴응력 범위 내에 있었지만 인장응력은 법랑질의 인장파괴응력 범위를 넘어섰다. 3. 비우식성치경부병소를 발생시키는 주요인은 설측교두의 협측경사면에 가해지는 교합압에 의한 인장응력이라고 보여진다.

Keywords

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