Determining the location of hip joint centre: Application of a conchoid's shape to the acetabular cartilage surface of magnetic resonance images

  • Kang M
  • Sadri H
  • Stern R
 et al. 
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Preoperative planning, or intraoperative navigation of hip surgery, including joint-preserving procedures such as osteotomy or joint-replacing procedures such as total arthroplasty, needs to be performed with a high degree of accuracy to ensure a successful outcome. The ability to precisely localise the hip joint rotation centre may prove to be very useful in this context. The human hip joint has been shown to be a conchoid shape, and therefore the accurate location of the hip joint centre (HJC) cannot be computed simply as the centre of a sphere. This study describes a method for determining the HJC by applying a conchoid shape to the acetabular cartilage surface of magnetic resonance images, in order to increase the accuracy of the HJC location which had previously been calculated by a functional method using reconstructed three-dimensional surface bony models. By approximating a conchoid shape to the acetabulum, it was possible to compensate for HJC calculation errors.

Author-supplied keywords

  • Conchoid
  • Hip joint centre location
  • Pre-operative planning
  • Total joint arthroplasty

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  • M. J. Kang

  • H. Sadri

  • R. Stern

  • N. Magnenat-Thalmann

  • P. Hoffmeyer

  • H. S. Ji

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