Computer‐Assisted Total Hip Arthroplasty Improves Acetabular Prosthesis Placement Accuracy: A Multicenter, Randomized Controlled Clinical Study

Abstract

Abstract Objective The long‐term effectiveness of total hip arthroplasty (THA) largely depends on the accuracy of acetabular prosthesis placement. To improve the accuracy of acetabular prosthesis placement, we utilized a new surgical navigation system: visual treatment solution (VTS). The purpose of this study was to verify the efficacy and safety of this system in assisting THA. Methods This was a prospective, multicenter, randomized controlled trial. One hundred and twenty‐four patients undergoing primary THAs were included. The experimental group underwent VTS‐assisted THA, and the control group underwent traditional surgical techniques. The main efficacy evaluation indicators were the proportion of anteversion and inclination angles in the Lewinnek safe zone, and secondary evaluation indicators included operation time, Western Ontario and McMaster University Osteoarthritis index (WOMAC) score, Harris score, short‐form‐36 (SF‐36) score, and hip dislocation rate. Statistical analysis was performed mainly by t‐test and chi‐square test. Results The proportion of both anteversion and inclination angles in the safe zone was 93.1% in the experimental group and 50.9% in the control group; the difference was significant (p 0.05). The dislocation rate was 0% in the experimental group and 1.6% in the control group; the difference was not significant (p > 0.05). Conclusion VTS‐assisted THA can significantly improve the accuracy of acetabular prosthesis placement. However, there were no differences in short‐term clinical outcomes or dislocation rates between the two groups.

Keywords

• Accuracy
• Computer‐Assisted Navigation
• Cup Position
• Safe Zone
• Total Hip Arthroplasty