Does robotic-assisted surgery improve outcomes of total hip arthroplasty compared to manual technique?
Abstract
A comprehensive review of 3,600 THA cases comparing robotic platforms (MAKO, ROBODOC) against manual instrumentation. Results highlight superior radiographic precision with robotics but a lack of short-term functional superiority.
Robotic Precision: The Radiographic Edge
Key Finding
"Robotic assistance increased safe-zone cup placement nine-fold (OR 9.06, p < 0.001) and significantly reduced limb length discrepancy (p = 0.01)."
Background: Robotic-assisted Total Hip Arthroplasty (THA) markets superior implant positioning as a driver for improved longevity and function. However, adoption is slowed by high costs and learning curves. This review aimed to strictly quantify whether the theoretical precision of robotics translates to tangible clinical victories over manual techniques.
Methods: A meta-analysis of 17 studies (including RCTs and cohort studies) comprising 3,600 THA cases. The authors compared Robotic-Assisted (RA) vs. Manual Technique (MT). Primary outcomes were radiographic accuracy (Lewinnek/Callanan safe zones) and limb length discrepancy (LLD). Secondary outcomes included operative time, complications, and Harris Hip Scores.
Results: Robotics demonstrated undeniable radiographic superiority: cups were significantly more likely to land in the safe zone (Odds Ratio 9.06; 95% CI 5.88-13.94). Limb length discrepancy was significantly lower in the robotic group (Mean Difference -1.44mm; p = 0.01). However, RA surgeries took significantly longer (mean + 19.5 minutes), and there was no significant difference in complication rates (p = 0.50), revision rates (p = 0.79), or functional Harris Hip Scores (p = 0.18).
Conclusion: Robotic assistance guarantees bullseye implant placement and equalized limb lengths, solving the problem of outliers. However, currently, this radiographic perfection has not yet translated into reduced revision rates or superior patient-reported outcomes compared to experienced manual surgeons.