Finite Element Analysis of Stress Distribution around the Micro-Patterned Implants

마이크로패터닝을 부여한 임플란트 주변골에서의 하중 분포에 관한 유한요소분석법적 연구

  • Hur, Bae-Young (Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Kangnung National University) ;
  • Kim, Dae-Gon (Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Kangnung National University) ;
  • Park, Chan-Jin (Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Kangnung National University) ;
  • Cho, Lee-Ra (Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Kangnung National University)
  • 허배녕 (강릉대학교 치과대학 치과보철학교실 및 구강과학연구소) ;
  • 김대곤 (강릉대학교 치과대학 치과보철학교실 및 구강과학연구소) ;
  • 박찬진 (강릉대학교 치과대학 치과보철학교실 및 구강과학연구소) ;
  • 조리라 (강릉대학교 치과대학 치과보철학교실 및 구강과학연구소)
  • Received : 2007.12.23
  • Accepted : 2008.03.25
  • Published : 2008.03.30

Abstract

Implant requires long lasting, strong osseointegration using bio-mechanical interlocking by bone ingrowth. In regarding the size level for bone ingrowth, the micro-patterning would enhance bone response. Micro-patterning can increase the area contacting the bone tissues. Therefore, it may distribute the load to the surrounding bone tissue, more effectively. This study compared and analyzed the load distributing effect with the shape and number of micro-patterning. For the optimal comparison of threads, the assumptions different from general finite element analysis model were made. It was assumed that the implant was axisymmetric and infinitely long. The implant was assumed to be completely embedded in the infinitely long cortical bone and to have 100% bone apposition. The implant-bone interface had completely fixed boundary conditions and received an infinitely big axial load. The condition of threads were as follows. The reference model 1 had conventional thread. Model 2 had 2 micro-patterns on the upper flank of the thread. Model 3 had 2 micro-patterns on the lower flank of the thread. Model 4 had 2 micro-patterns on the upper and lower flanks of the thread. Model 5 had 3 micro patterns on the upper and lower flanks of the thread. The results were as follows: 1. The thread with micro-patterns distributed stress better than the conventional thread. 2. The thread with micro-patterns on the lower flank distributed stress better than that with micro-patterns on the upper flank. 3. The thread with 3 micro-patterns distributed stress better than that with 2 micro-patterns, However, an area with stress concentration occurred.

Acknowledgement

Supported by : 강릉대학교 치과병원

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