Biomechanical analysis by the three-dimensional finite element method of stress in bone fixation plates after sagittal spliting ramus osteotomy

DOI 被引用文献2件 参考文献11件
  • Nakajima Masahiro
    Second Department of Oral and Maxillofacial Surgery, Osaka Dental University
  • Motohashi Tomokazu
    Second Department of Oral and Maxillofacial Surgery, Osaka Dental University
  • Okuda Katsuya
    Second Department of Oral and Maxillofacial Surgery, Osaka Dental University
  • Sunada Noriko
    Second Department of Oral and Maxillofacial Surgery, Osaka Dental University
  • Shojyu Yuichi
    Second Department of Oral and Maxillofacial Surgery, Osaka Dental University
  • Yoshimoto Hitoshi
    Second Department of Oral and Maxillofacial Surgery, Osaka Dental University
  • Tanaka Katsuya
    Second Department of Oral and Maxillofacial Surgery, Osaka Dental University
  • Kakudo Kenji
    Second Department of Oral and Maxillofacial Surgery, Osaka Dental University
  • Matsumoto Naoyuki
    Department of Orthodontics, Osaka Dental University
  • Matsumoto Toshiro
    Faculty of Biology-Oriented Science and Technology, Kinki University

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説明

Bone fixation with miniplates has recently been used for fixation following sagittal spliting ramus osteotomy. We have observed breakage L-shaped titanium miniplates during the postoprerative observation period. We investigated the breakage cases, and performed biomechanical analysis of stress on L-shaped and straight miniplates in a sagittal spliting ramus osteotomy model, which we developed using CT images and the three-dimensional finite element method.<br> Breakage was detected in 22 sides (18 patients) in miniplates placed on 123 sides between January 2000 and December 2001. The period between surgery and breakage was less than 3 months in 17 of the miniplates, between 3 and 6 months in 3 miniplates, and greater than 6 months in 2 of them. The breakage, when it occurred, was always at the bending site of the L-shaped miniplates. Stress analysis by the three-dimensional finite element method demonstrated that the stress level was greatest at the upper margin of the bending region in the L-shaped plates.<br> Although it is thought that there is no difference in the effectiveness of bone union between L-shaped and straight miniplates, the letter may be better in resisting long-term stress on the jaw bone, such as occurs during relapse. (J Osaka Dent Univ 2007 ; 41 : 89-96)

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