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Component Alignment in Hip Resurfacing Using Computer Navigation

  • Original Article
  • Published:
Clinical Orthopaedics and Related Research

Abstract

The use of computer navigation during hip resurfacing has been proposed to reduce the risk of a malaligned component and notching with subsequent postoperative femoral neck fracture. Femoral component malalignment and notching have been identified as the major factors associated with femoral neck fracture after hip resurfacing. We performed 37 hip resurfacing procedures using an imageless computer navigation system. Preoperatively, we generated a patient-specific computer model of the proximal femur and planned a target angle for placement of the femoral component in the coronal plane. The mean navigation angle after implantation (135.5°) correlated with the target stem-shaft angle (135.4°). After implantation, the mean stem-shaft angle of the femoral component measured by three-dimensional computed tomography (135.1°) correlated with the navigation target stem-shaft angle (135.4°). The computer navigation system generates a reliable model of the proximal femur. It allows accurate placement of the femoral component and provides precise measurement of implant alignment during hip resurfacing, thereby reducing the risk of component malpositioning and femoral neck notching.

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Acknowledgments

We thank Belinda Grygorcewicz for assistance with data collection.

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Authors and Affiliations

  1. Sportsmed SA, 32 Payneham Road, Stepney, Adelaide, SA, 5069, Australia

    Chris Bailey FRCS(Tr&Orth), Rehan Gul FRCS(Tr&Orth), Mark Falworth FRCS(Tr&Orth) & Roger Oakeshott FRACS

  2. Dr Jones and Partners Medical Imaging, St Andrew’s Hospital, Adelaide, SA, Australia

    Steven Zadow FRANZCR

Authors
  1. Chris Bailey FRCS(Tr&Orth)
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  2. Rehan Gul FRCS(Tr&Orth)
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  3. Mark Falworth FRCS(Tr&Orth)
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  4. Steven Zadow FRANZCR
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  5. Roger Oakeshott FRACS
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Corresponding author

Correspondence to Chris Bailey FRCS(Tr&Orth).

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Each author certifies that he or she has no commercial associations (eg, consultancies, stock ownership, equity interest, patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article.

Each author certifies that his institution has approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent for participation in the study was obtained.

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Bailey, C., Gul, R., Falworth, M. et al. Component Alignment in Hip Resurfacing Using Computer Navigation. Clin Orthop Relat Res 467, 917–922 (2009). https://doi.org/10.1007/s11999-008-0584-x

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  • DOI: https://doi.org/10.1007/s11999-008-0584-x

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