Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

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

Finite Element Analysis on the Supporting Bone according to the Connection Condition of Implant Prosthesis

임플란트 보철물의 연결 여부에 따른 유한요소응력분석

  • Kang, Jae-Seok (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)
  • 강재석 (조선대학교 치과대학 보철학교실) ;
  • 정제옥 (조선대학교 치과대학 보철학교실) ;
  • 이승훈 (조선대학교 치과대학 보철학교실)
  • Published : 2007.03.30
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Abstract

The purpose of this study was to compare the stress distribution according to the splinting condition and non-splinting conditions on the finite element models of the two units implant prostheses. The finite element model was designed with the parallel placement of two fixtures ($4.0mm{\times}11.5mm$) on the mandibular 1st and 2nd molars. A cemented abutment and gold screw were used for superstructures. A FEA models assumed a state of optimal osseointegration, as the bone quality, inner cancellous bone and outer 2 mm compact bone was designed. This concluded that the cortical and trabecular bone were assumed to be perfectly bonded to the implant. Splinting condition had 2 mm contact surface and non-splinting condition had $8{\mu}m$ gap between two implant prosthesis. Two group (Splinting and non-splinting) were loaded with 200 N magnitude in vertical axis direction and were divided with subdivision group. Subdivision group was composed of three loading point; Center of central fossa, the 2 mm and 4 mm buccal offset point from the central fossa. Von Mises stress value were recorded and compared in the fixture-bone interface and bucco-lingual sections. The results were as follows; 1. In the vertical loading condition of central fossa, splinting condition had shown a different von Mises stress pattern compared to the non-splinting condition, while the maximum von Mises stress was similar. 2. Stresses around abutment screw were more concentrated in the splinting condition than the non-splinting condition. As the distance from central fossa increased, the stress concentration increased around abutment screw. 3. The magnitude of the stress in the cortical bone, fixture, abutment and gold screw were greater with the 4 mm buccal offset loading of the vertical axis than with the central loading.

Keywords

References

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