Cup Medialization in Total Hip Arthroplasty

This lecture discusses the concept of cup medialization in total hip arthroplasty, focusing on the increase in femoral offset and decrease in acetabular offset to improve lever arms while considering the loss of bone stock. It covers the limitations of 2D X-ray analysis, muscle volume, muscle fibers, gait analysis, a numerical model based on CT scans of 15 patients, and the impact on the gluteus medius. The lecture also explores the relative moment arm increase, correlation with anatomy, and the advantages of cup medialization quantified through statistical analysis on 15 patients, highlighting the dependence on anatomical parameters and surgical techniques.