Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

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

Stress Analysis on the Supporting Bone around the Implant According to the Vertical Bone Level

치조골 높이가 다른 임프란트 주위 지지골 응력분석

  • Boo, Soo-Boong (Department of Prosthodontics, College of Dentistry, Chosun University) ;
  • Jeung, Jei-Ok (Department of Prosthodontics, College of Dentistry, Chosun University) ;
  • Lee, Seung-Hoon (Department of Prosthodontics, College of Dentistry, Chosun University) ;
  • Kim, Chang-Hyun (Department of Prosthodontics, College of Dentistry, Chosun University) ;
  • Lee, Seung-Ho (Department of Prosthodontics, College of Dentistry, Chosun University)
  • 부수붕 (조선대학교 치과대학 보철학교실) ;
  • 정제옥 (조선대학교 치과대학 보철학교실) ;
  • 이승훈 (조선대학교 치과대학 보철학교실) ;
  • 김창현 (조선대학교 치과대학 보철학교실) ;
  • 이승호 (조선대학교 치과대학 보철학교실)
  • Published : 2007.03.30
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Abstract

The purpose of this study was to analyze the distribution of stress in the surrounding bone around implant placed in the first and second molar region. Two different three-dimensional finite element model were designed according to vertical bone level around fixture ($4.0mm{\times}11.5mm$) on the second molar region. A mandibular segment containing two implant-abutments and a two-unit bridge system was molded as a cancellous core surrounded by a 2mm cortical layer. The mesial and distal section planes of the model were not covered by cortical bone and were constrained in all directions at the nodes. Two vertical loads and oblique loads of 200 N were applied at the center of occlusal surface (load A) or at a position of 2mm apart buccally from the center (load B). Von-Mises stresses were analyzed in the supporting bone. The results were as follows; 1. With the vertical load at the center of occlusal surface, the stress pattern on the cortical and cancellous bones around the implant on model 1 and 2 was changed, while the stress pattern on the cancellous bone with oblique load was not. 2. With the vertical load at the center of occlusal surface, the maximum von-Mises stress appeared in the outer distal side of the cortical bone on Model 1 and 2, while the maximum von-Mises stress appeared in the distal and lingual distal side of the cortical bone with oblique load. 3. With the vertical load at a position of 2 mm apart buccally from the center, there was the distribution of stress on the upper portion of the implant-bone interface and the cortical bone except for the cancellous bone, while there was a distribution of stress on the cancellous bones at the apical and lingual sides around the fixture and on the cortical bone with oblique load. 4. With the changes of the supporting bone on the second molar area, the stress pattern on the upper part of the cortical bone between two implants was changed, while the stress pattern on the cancellous bone was not. The results of this study suggest that establishing the optimum occlusal contact considering the direction and position of the load from the standpoint of stress distribution of surrounding bone will be clinically useful.

Keywords

References

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