CT-Based Assessment of Femoral Stem Anteversion After Intentional Intraoperative Rotational Adjustment of a Single-Wedge Tapered Stem in Total Hip Arthroplasty

Background/Objectives: Prosthetic anteversion (PA) is generally considered to be constrained by three-point fixation in the sagittal plane. However, previous studies have reported inconsistent changes from native femoral anteversion (NFA) to prosthetic anteversion (PA), ranging from no appreciable change to a mean increase of approximately 8°, suggesting that PA may not be determined by femoral anatomy alone. This study aimed to evaluate whether femoral stem anteversion can be intentionally adjusted towards a target angle and to identify factors associated with failure to achieve the intended correction.