Analysis of Acetabular Cup Positioning and Functional Outcomes in Total Hip Replacement.

INTRODUCTION

Acetabular cup positioning is critical in total hip replacement (THR) for achieving optimal joint biomechanics and preventing complications. This study evaluates the relationship between postoperative cup orientation, measured via computed tomography (CT), and functional outcomes assessed using the Harris Hip Score (HHS).

METHODS

A prospective observational study was conducted that included 30 patients undergoing primary THR. Cup inclination and anteversion were measured postoperatively via CT scans. Functional evaluation was done using HHS and range of motion (ROM) at six months. Statistical analysis included paired t-tests and descriptive metrics.

RESULTS

The mean anteversion was 15.3° ± 5.85°, and the mean inclination was 42.7° ± 5.31°. Significant ROM improvements were observed (p<0.001), but no significant correlation was found between cup orientation and HHS (anteversion: r=0.12, p=0.52; inclination: r=0.08, p=0.67).

CONCLUSION

We conclude that precise cup positioning enhances stability, but functional outcomes depend on multiple factors, including comorbidities and rehabilitation. CT evaluation post-surgery offers a reliable assessment tool. Larger, multicenter studies with extended follow-up are warranted to confirm these results.