Optimizing leg length accuracy in total hip arthroplasty: Steinmann pin technique vs preoperative digital planning—a randomized controlled study

Background Leg length discrepancy (LLD) remains a significant complication of total hip arthroplasty (THA), affecting patient's satisfaction and functional outcomes. Methods We have performed a prospective randomized control study to evaluate the efficacy of intraoperative technique with Steinmann pin as fixed supra-acetabular point to measure the leg length compared with preoperative planning with OrthoView digital software alone. Results Results showing that group A (Steinmann pin group) has a significantly lower postoperative LLD (p < 0.05) compared to group B (preoperative planning alone). There were no significant differences in operative time or blood loss between both groups. Conclusion The combination of preoperative digital imaging templating and intraoperative measurement using Steinmann pin as a fixed supra-acetabular marker for reference in THA can optimize leg length control on a posterolateral approach. The use of intraoperative measurement using Steinmann pin does not statistically increase the blood loss or operation time.