대한치과교정학회지 (The korean journal of orthodontics)

  • 제41권6호
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  • Pages.423-430
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  • 2011
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  • 2234-7518(pISSN)
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  • 2005-372X(eISSN)
대한치과교정학회 (The Korean Association Of Orthodontists)
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다양한 길이의 two-component 미니 임플란트의 응력분산에 대한 3차원적 유한요소분석

Three-dimensional finite element analysis for determining the stress distribution after loading the bone surface with two-component mini-implants of varying length

  • Choi, Bohm (Department of Prosthodontics, Yeouido St. Mary's Hospital, The Catholic University of Korea) ;
  • Lee, Dong-Ok ;
  • Mo, Sung-Seo (Department of Orthodontics, Yeouido St. Mary's Hospital, The Catholic University of Korea) ;
  • Kim, Seong-Hun (Department of Orthodontics, School of Dentistry, Kyung Hee University) ;
  • Park, Ki-Ho (Department of Orthodontics, School of Dentistry, Kyung Hee University) ;
  • Chung, Kyu-Rhim (Department of Orthodontics, School of Clinical Dental Scinece, Ajou University) ;
  • Nelson, Gerald (Department of Orofacial Science, University of California in San Francisco) ;
  • Han, Seong-Ho (Department of Orthodontics, St. Vincent Hospital, The Catholic University of Korea)
  • 투고 : 2011.05.08
  • 심사 : 2011.11.01
  • 발행 : 2011.12.30
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초록

Objective: To evaluate the extent and aspect of stress to the cortical bone after application of a lateral force to a two-component orthodontic mini-implant (OMI, mini-implant) by using three-dimensional finite element analysis (FEA). Methods: The 3D-finite element models consisted of the maxilla, maxillary first molars, second premolars, and OMIs. The screw part of the OMI had a diameter of 1.8 mm and length of 8.5 mm and was placed between the roots of the upper second premolar and the first molar. The cortical bone thickness was set to 1 mm. The head part of the OMI was available in 3 sizes: 1 mm, 2 mm, and 3 mm. After a 2 N lateral force was applied to the center of the head part, the stress distribution and magnitude were analyzed using FEA. Results: When the head part of the OMI was friction fitted (tapped into place) into the inserted screw part, the stress was uniformly distributed over the surface where the head part was inserted. The extent of the minimum principal stress suggested that the length of the head part was proportionate with the amount of stress to the cortical bone; the stress varied between 10.84 and 15.33 MPa. Conclusions: These results suggest that the stress level at the cortical bone around the OMI does not have a detrimental influence on physiologic bone remodeling.

키워드

참고문헌

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