Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지

Three Dimensional Finite Element Analysis on Stress Distribution According to the Bucco-lingual Inclination of the Implant Fixture and Abutment in the Mandibular Posterior Region

하악 구치부에서 임플란트 고정체와 지대주의 협설 기울기에 따른 응력분포에 관한 삼차원 유한요소 분석

  • Lee, Hyun-Sook (Dept. of Implantology, Graduate School of Clinical dentistry Ewha Womans University) ;
  • Kim, Ji-Youn (Dept. of Dentistry, Mok-dong Hospital School of Medicine, Ewha Womans University) ;
  • Kim, Ye-Mi (Dept. of Dentistry, Mok-dong Hospital School of Medicine, Ewha Womans University) ;
  • Kim, Myung-Rae (Dept. of Implantology, Graduate School of Clinical dentistry Ewha Womans University) ;
  • Kim, Sun-Jong (Dept. of Implantology, Graduate School of Clinical dentistry Ewha Womans University)
  • 이현숙 (이화여자대학교 임상치의학대학원 임플란트치의학전공) ;
  • 김지연 (이화여자대학교 의학전문대학원 치과학교실) ;
  • 김예미 (이화여자대학교 의학전문대학원 치과학교실) ;
  • 김명래 (이화여자대학교 임상치의학대학원 임플란트치의학전공) ;
  • 김선종 (이화여자대학교 임상치의학대학원 임플란트치의학전공)
  • Received : 2011.09.18
  • Accepted : 2011.12.25
  • Published : 2011.12.31
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Abstract

The purpose of this study was to comparatively analyze the stress distribution according to the inclinations of abutments and angulations of the implant fixtures under occlusal loading force. Three study models with straight and $15^{\circ}$ and $25^{\circ}$-angled abutments were prepared following the insertion of Implants parallel to the long axis of the tooth. Additional two experimental models were fabricated with $15^{\circ}$ and $25^{\circ}$ fixture inclinations. Using ANSYS 11, a finite element analysis program, the magnitudes of stress distribution were analyzed. The magnitude of stress under loading was lowest when the load was applied vertically onto the axis of implant. And the magnitude of stress under compound(vertical+oblique) loading was increased as the inclination of implant abutment and fixture was increase. But, the distribution of stress was different as the loading conditions, because of the horizontal offset. As the offset between the axis of loading and the central axis of the implant increased, the stress was increased.

본 연구는 임플란트의 지대주와 고정체의 식립 기울기 변화에 따른 교합력의 응력 분산을 비교 분석하고자 하였다. 치아 장축에 평행하게 식립한 임플란트 위에 직선적 지대주를 체결한 것을 기준 모델로 하여, $15^{\circ}$, $25^{\circ}$ 설측 경사진 지대주를 체결한 모델 2종류, 고정체를 $15^{\circ}$, $25^{\circ}$ 설측 경사 식립 후 동일 각도의 협측 경사의 지대주를 체결한 모델 2종류, 총 5개의 연구 모델에 각각 수직하중과 경사하중을 부가하여 나타난 응력분포를 3차원 유한요소법(finite element analysis)를 이용하여 분석하였다. 연구 결과, 지대주와 고정체의 식립 기울기가 증가할수록 복합하중에서 임플란트와 주위조직의 응력은 증가하였다. 다만 하중의 위치와 종류에 따라 응력의 변화가 모델에 따라 부분적으로 다르게 나타나기도 했다. 이는 응력이 하중의 작용선과 임플란트 고정체의 중심선과의 거리인 수평적 편심부하(horizontal offset)가 변화한 결과이며, 편심부하가 증가할수록 응력도 증가하는 결과를 보였다.

Keywords

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