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

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

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)103-112
Number of pages10
JournalComputer Methods in Biomechanics and Biomedical Engineering
Issue number1
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomedical Engineering
  • Human-Computer Interaction
  • Computer Science Applications


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