Accuracy of Component Positioning in 1980 Total Hip Arthroplasties: A Comparative Analysis by Surgical Technique and Mode of Guidance

Accuracy of Component Positioning in 1980 Total Hip Arthroplasties: A Comparative Analysis by Surgical Technique and Mode of Guidance

Authors

Domb BG, Redmond JM, Louis SS, Alden KJ, Daley RJ, LaReau JM, Petrakos AE, Gui C, Suarez-Ahedo C.
DOI: 10.1016/j.arth.2015.06.059

Purpose

To assess and compare accuracy of acetabular component placement, leg length discrepancy (LLD), and global offset difference (GOD) across six surgical techniques and guidance modes in total hip arthroplasty (THA).

Methods

• Retrospective analysis of 1980 THAs performed with different techniques, including robotic and navigation guidance.
• Outcomes assessed included placement within Lewinnek and Callanan safe zones, LLD, and GOD.

Key Findings

• Robotic- and navigation-guided surgeries placed cups more consistently within Lewinnek's safe zone (P<0.005 and P<0.05).
• Robotic guidance was also superior for Callanan's safe zone placement (P<0.005).
• No significant differences in excessive LLD or GOD among groups.

Conclusion

Robotic and navigation guidance improve precision of acetabular cup placement compared to other techniques, with no difference in leg length or offset discrepancies.

What This Means for Patients

Using robotic or navigation assistance during hip replacement may improve implant positioning, which can impact implant longevity and function.