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The biomechanical effect of the collar of a femoral stem on total hip arthroplasty

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  • Insu Jeon
  • Ji-Yong Bae
  • Jin-Hong Park
  • Taek-Rim Yoon
  • Mitsugu Todo
  • Masaaki Mawatari
  • Takao Hotokebuchi

Abstract

To investigate the biomechanical effect of collars, finite element analyses are carried out through two hip joints that are implanted using collared and collarless stems, respectively, and an intact hip joint model. For the analyses, the sacrum, coxal bone, and the cancellous and cortical bones of a femur are modelled using finite elements based on X-ray computed tomographic images taken from a 27-year-old woman. From the results, it is found that a collar with perfect calcar contact prevents stem subsidence and decreases the proximal–lateral gap and the lateral stem tilting. Therefore, it can impart reasonable biomechanical stability for total hip arthroplasty. However, its low load transmission ability and increased stem tilting effect due to the imperfect contact between the collar and the calcar are found to be serious problems that need to be solved. Results of clinical follow-up are presented for supporting the computational results.

Suggested Citation

  • Insu Jeon & Ji-Yong Bae & Jin-Hong Park & Taek-Rim Yoon & Mitsugu Todo & Masaaki Mawatari & Takao Hotokebuchi, 2011. "The biomechanical effect of the collar of a femoral stem on total hip arthroplasty," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 14(01), pages 103-112.
    • Handle: RePEc:taf:gcmbxx:v:14:y:2011:i:01:p:103-112
    DOI: 10.1080/10255842.2010.493513
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    Cited by:

    1. Sara C. Neves & Acm Pinho & Jaime C. Fonseca & Nuno F. Rodrigues & Tiago Henriques-Coelho & Jorge Correia-Pinto & João L. Vilaça, 2015. "Finite element analysis of surgical correction via a minimally invasive approach," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 18(7), pages 711-720, May.

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