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July 21, 2026Archives of Orthopaedic and Trauma SurgeryOpen Access

Robotic-arm assistance in revision total hip arthroplasty improves the accuracy of acetabular component positioning: a cadaver-based study

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Authors

KFKailey FitzgeraldStryker (United States)IBIlya BorukhovStryker (United States)VCVarun ChandraStryker (United States)

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Implication

Randomized trial measures acetabular component positioning accuracy in cadavers using robotic assistance, suggesting improved surgical outcomes.

Key Points

  • This study assesses the accuracy and precision of acetabular component positioning in revision total hip arthroplasty using robotic assistance compared to manual techniques.
  • Cadaver-based analysis involving seven cadavers (nine hips), comparing robotic-arm assisted total hip arthroplasty (RA-THA) with manual total hip arthroplasty (M-THA) benchmarks.
  • Pre- and postoperative CT scans analyzed for absolute error in acetabular inclination, version, and center of rotation; statistical tests employed include Welch's t-test and Anderson-Darling test.
  • Surgeon case volume was considered, assessing its impact on positioning errors.
  • Revision RA-THA showed significantly better accuracy for acetabular inclination (2.5 ± 1.9° vs. 7.2 ± 3.2°, P = 0.008) and version (2.2 ± 1.6° vs. 7.8 ± 4.6°, P = 0.014).
  • Revision RA-THA had greater precision for acetabular version (P = 0.023) compared to M-THA.
  • Mean error reductions for version (5.7°) and inclination (4.7°) were observed, and lower error for center of rotation compared to M-THA.

Cite This Study

Fitzgerald et al. (2026) studied this question.

synapsesocial.com/papers/6a5f0b6586a4235cc16191d3https://doi.org/10.1007/s00402-026-06395-0
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1A prospective randomized controlled trial comparing CT-based planning with conventional total hip arthroplasty versus robotic arm-assisted total hip arthroplasty2024 · 44 citations
  2. 2Comparison of accuracy of acetabular cup placement using manual versus robotic-assistance in the same patient cohort undergoing robotic-assisted total hip arthroplasty2026
  3. 3Robotics improves reproducibility of component positioning while producing modest but measurable clinical benefits in total hip arthroplasty: an umbrella review of systematic reviews and meta-analyses2026
  4. 4Using a robotic-arm assisted system in revision total hip arthroplasty: surgical technique and a case series2026
  5. 5Surgical accuracy of implant positioning in robotic-assisted versus conventional total hip arthroplasty – Experience of a Joint Replacement Centre in Hong Kong2026