Predictive Value of Robotic-Assisted Total Hip Arthroplasty
Authors: El Bitar YF, Jackson TJ, Lindner D, Botser IB, Stake CE, Domb BG
DOI: 10.3928/01477447-20150105-57
Purpose
Evaluate accuracy of robotic-assisted THA in predicting postoperative alignment parameters (cup inclination/anteversion, leg-length discrepancy, global offset).
Methods
Prospective study of 61 robotic-assisted THAs by one surgeon; compared intraoperative robotic data with blinded postoperative radiographic measurements.
Key Findings
- Strong correlation (r > 0.8) between robotic predictions and radiographic outcomes for all parameters.
- 96.7% of cup inclinations and 98.4% of anteversions were within 10° of radiographic values.
- 100% of leg-length changes and 91.8% of global offset changes within 10 mm.
Conclusion
Robotic-assisted THA reliably predicts key postoperative alignment measures; system refinement may further improve precision.
What Does This Mean for Providers?
- Robotic systems can enhance surgical precision in implant positioning and leg-length restoration.
- Incorporate robotic assistance to potentially reduce complications from malpositioning (e.g., dislocation, gait abnormalities).
- Use robotic data intraoperatively to verify alignment and leg-length goals, improving patient outcomes.