Clinical accuracy and precision of hip resurfacing arthroplasty using computed tomography-based navigation
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To avoid malalignment of components during hip resurfacing arthroplasty (HRA), we used a computed tomography (CT)-based navigation system for guidance. This study aimed to evaluate the clinical accuracy and precision of HRA performed using the CT-based navigation systems.
HRA was performed on 17 hips guided by the CT-based navigation systems. We measured cup alignment deviation, deviation of the stem position, and alignment from the plan by image matching between pre-operative and post-operative CT images.
Cup anteversion was within 5° of that in the plan in all cases. Cup inclination was within 5° of that in the plan in 82.4% and within 10° in all cases. The angular difference of the stem was within 5° in all cases, and the entry point of the stem was within 4 mm in all cases.
The CT-based navigation system for HRA guided accurate component placement according to the plan.
KeywordsHip resurfacing arthroplasty Computed tomography Navigation Computer-assisted orthopaedic surgery Accuracy
We thank Prof. Hideki Yoshikawa from Osaka University for his advice and criticism.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflicts of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Formal consent is not required for this type of retrospective cohort study.
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