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Validation of a Prototype Augmented Reality Navigation System for Total Hip Replacement.

Jevan Arulampalam1,2, Andrew Bucknill3, Sanjeev Gupta4

  • 1School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney Australia.

Surgical Technology International
|October 18, 2022
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Summary

This study introduces a novel, small-footprint augmented reality (AR) system for precise total hip replacement (THR) surgery. The AR system accurately guides implant placement, showing comparable results to existing navigation methods.

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Area of Science:

  • Orthopedic Surgery
  • Medical Technology
  • Computer-Assisted Surgery

Background:

  • Assistive technologies enhance accuracy in total hip replacement (THR).
  • Existing systems can be large and complex, occupying valuable operating room space.

Purpose of the Study:

  • To develop and validate a compact augmented reality (AR) system for accurate acetabular component placement in THR.
  • To assess the system's accuracy in achieving preoperatively planned implant positions.

Main Methods:

  • A small-footprint AR prototype was developed, overlaying 3D pelvic models and target cup positions.
  • Cadaveric surgeries were performed using the AR system for acetabular cup placement.
  • Postoperative CT scans measured the accuracy of achieved implant positions against preoperative targets.

Main Results:

  • Mean absolute deviations from target placement were 2.9° for inclination, 3.0° for anteversion, and 1.6mm for depth.
  • Sixty-six percent of implant placements were within +/-5° of the target orientation.
  • The system demonstrated high accuracy in guiding acetabular component positioning.

Conclusions:

  • A small-footprint AR system can facilitate accurate acetabular cup placement in THR.
  • The developed AR system provides intraoperative guidance comparable to established navigation techniques.
  • This technology offers a space-saving solution for improving surgical accuracy in hip replacement.