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Related Experiment Video

Updated: Jul 18, 2025

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
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Three-Dimensional Preoperative Planning Software for Hip Resurfacing Arthroplasty.

M Abdulhadi Alagha1, Kartik Logishetty1, Ciaran O'Hanlon1

  • 1MSk Lab, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London W12 0BZ, UK.

Bioengineering (Basel, Switzerland)
|August 26, 2023
PubMed
Summary

This study validates the 3D Hip Planner for hip resurfacing arthroplasty (HRA), finding it reliable for preoperative planning. The software enhances accuracy and shows potential for optimizing surgical outcomes in HRA.

Keywords:
3D plannerarthroplastyhip resurfacingpreoperative planning

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Area of Science:

  • Orthopedic Surgery
  • Medical Imaging
  • Surgical Planning Software

Background:

  • Three-dimensional (3D) planning improves visualization and implant sizing in hip arthroplasty, potentially reducing surgical time and complications.
  • Hip resurfacing arthroplasty (HRA) is technically demanding, with challenges in accurate implant placement.

Purpose of the Study:

  • To evaluate the validity, reliability, and usability of a preoperative 3D Hip Planner software specifically for HRA.
  • To assess the software's accuracy in determining implant size, stem-shaft angle, and cup inclination angle compared to 2D planning.

Main Methods:

  • Fifty random HRA cases were planned twice by junior trainees using the 3D Hip Planner within a month.
  • Outcome measures (implant size, stem-shaft angle, cup inclination) were compared between 3D and 2D planning.
  • Software usability was assessed using an adapted Unified Theory of Acceptance and Use of Technology (UTAUT) survey.

Main Results:

  • Bland-Altman analysis showed minimal mean differences between 3D and 2D planning for stem-shaft (0.7°) and inclination (-0.6°) angles.
  • Inter-rater reliability showed biases of -2° for stem-shaft and 3° for inclination angles.
  • High test-retest reliability (r=0.98) and significant association (r=0.91) were found for femoral implant size, with repeatability within ±2° and ±3° for angles.

Conclusions:

  • The 3D Hip Planner demonstrates validity and reliability for preoperative planning in hip resurfacing arthroplasty.
  • The software shows significant potential for optimizing the quality and accuracy of surgical planning in HRA.
  • Usability surveys indicated positive user acceptance, with 70-90% agreeing on improved expectancy in key domains.