Comparison of Robotic-Assisted and Conventional Acetabular Cup Placement in THA: A Matched-Pair Controlled Study
Authors
Domb BG, El Bitar YF, Sadik AY, Stake CE, Botser IB
https://doi.org/10.1007/s11999-013-3253-7
Purpose
To determine whether robotic-assisted total hip arthroplasty (THA) improves acetabular cup placement accuracy compared to conventional manual techniques.
Methods
50 robotic-assisted THAs were compared with 50 matched conventional THAs performed via a posterior approach. Placement accuracy was measured using Lewinnek’s and Callanan’s “safe zones.”
Key Findings
Robotic-assisted THAs had significantly more accurate cup positioning: 100% were within Lewinnek’s safe zone (vs. 80% in the conventional group, p = .001), and 92% were within Callanan’s zone (vs. 62%, p = .001).
Conclusion
Robotic assistance significantly improves the precision of acetabular component placement in THA.
What This Means for Patients
Robotic-assisted hip replacement may lower risks of implant misalignment, potentially reducing complications such as dislocation or early wear, although long-term clinical benefits remain to be proven.