The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

EFFECTS OF BONE ENGAGEMENT TYPE&IMPLANT LENGTH ON STRESS DISTRIBUTION: A THREE DIMENSIONAL FINITE ELEMENT ANALYSIS

임플란트 매식조건에 따른 상, 하악골의 응력분포 양상에 대한 3차원 유한요소분석 연구

  • Choi, Jeong-Hwa (Department of Prosthodontics, College of Medicine, Ewha Womans University) ;
  • Seo, Ki-Youl (Department of Aeromautical & Mechanical Engineering, Hankook Aviation University) ;
  • Choi, Joo-Ho (Department of Aeromautical & Mechanical Engineering, Hankook Aviation University) ;
  • Han, Jung-Suk (Department of Prosthodontics, College of Medicine, Ewha Womans University)
  • 최정화 (이화여자대학교 의과대학 치과학교실 보철과) ;
  • 서기열 (한국항공대학교 기계공학과) ;
  • 최주호 (한국항공대학교 기계공학과) ;
  • 한중석 (이화여자대학교 의과대학 치과학교실 보철과)
  • Published : 1999.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

A finite element analysis has been utilized to analyze stress and strain fields and design a new configuration in orthopedics and implant dentistry. Load transfer and stress analysis at implant bone interface are important factors from treatment planning to long term success. Bone configuration and quality are different according te anatomy of expecting implantation site. The purpose of this study was to compare the stress distribution in maxilla and mandible accord-ing to implant length and bone engagement types. A three dimensional axi-symmetric implant model(Nobel Biocare, Gothenburg, Sweden) with surrounding cortical and cancellous bone were designed to analyze the effects of bone engagement and implant length on stress distribution. ANSYS 5.5 finite element program was utilized as an interpreting toot. Three cases of unicortical anchorage model with 7, 10, 13 mm length and four cases of bicortical anchorage model with 5, 7, 10 and 13 mm length were compared both maxillary and mandibular single implant situation. Within the limits of study, following conclusions were drawn. 1. There is a difference in stress distribution according to cortical and cancellous bone thickness and shape. 2. Maximum stress was shown at the top of cortical bone area regardless of bone engagement types. 3. Bicortical engagement showed less stress accumulation when compared to unicortical case overall. 4. Longer the implant future length, less the stress on cortical bone area, however there is no difference in mandibular bicortical engagement case.

Keywords