Accuracy of Component Placement in Robotic-Assisted Total Hip Arthroplasty
Authors
Redmond JM, Gupta A, Hammarstedt JE, Petrakos A, Stake CE, Domb BG
DOI: 10.3928/01477447-20160404-06
Purpose
To evaluate the accuracy of robotic-assisted total hip arthroplasty (THA) in predicting postoperative acetabular component position, leg length, and offset compared to radiographic measurements.
Methods
146 patients undergoing robotic-assisted THA had intraoperative component placement data compared with pre- and postoperative radiographs. Subgroup analysis was performed by surgical approach (posterior vs anterior).
Key Findings
Mean differences between robotic and radiographic measurements were small (around 3° for angles, 3-4 mm for leg length and offset). Over 95% of cases were within 10° of target angles for acetabular components.
Conclusions
Robotic-assisted THA accurately predicts component placement and leg length restoration, with minimal discrepancies compared to radiographs, although surgeons must watch for rare system malfunctions.
What this means for patients
Robotic-assisted hip replacement can improve surgical precision, potentially reducing complications from misaligned implants and improving outcomes.