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Biomechanical study on the efficacy of the periacetabular osteotomy using Patient-specific finite element analysis

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Abstract

Periacetabular osteotomy (PAO) is a joint-preserving surgical procedure and it has been introduced as a surgical alternative to the total hip arthroplasty (THA) for young person. However, its clinical and biomechanical efficacies remain unknown. In this study, we constructed patient-specific finite element (FE) models of the hip joint before and after surgery to evaluate the efficacies in more quantitative fashion. 3-D FE models were constructed based on patient's computed tomography (CT) images. Post-operative geometrical changes in joint contact areas, center-edge (CE) angle and distance between the symphysis pubis and the femoral head (DBSPFH) were assessed in three dimensions. In addition, changes in peak contact pressures and peak von Mises stress (PVMS) at the hip joint were predicted. After PAO, CE angle was increased by 126.2% and DBSPFH was decreased by 3.7%. The contact area was increased by 32% while peak contact pressure was decreased by 53.8%. More even distribution of stresses at the femur were observed. Our results suggested that for this given patient PAO was an effective reconstructive surgical choice in terms of reconstructing joint congruency. Therefore, PAO can be considered a good alternative to THA especially for young patients who need to be treated with joint-preserving techniques.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, St. Mary’s Hospital, Catholic University, 10, 63-ro, Yeongdeungpo-gu, Seoul, 150-713, South Korea

    Kyung-Jin Lee & Soon-Yong Kwon

  2. Department of Biomedical Engineering, Inje University, 197, Inje-ro, Gimhae-si, Gyeongsangnam-do, 621-749, South Korea

    Sung-Jae Park & Sung-Jae Lee

  3. Department of Orthopaedic Surgery, Fukuoka University School of Medicine, Fukuoka, 814-0180, Japan

    Masatoshi Naito

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  1. Kyung-Jin Lee
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Correspondence to Soon-Yong Kwon.

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Lee, KJ., Park, SJ., Lee, SJ. et al. Biomechanical study on the efficacy of the periacetabular osteotomy using Patient-specific finite element analysis. Int. J. Precis. Eng. Manuf. 16, 823–829 (2015). https://doi.org/10.1007/s12541-015-0108-z

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  • DOI: https://doi.org/10.1007/s12541-015-0108-z

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