Measurement of acetabular erosion. The effect of pelvic rotation on common landmarks

摘要: Using dried bones which could be tilted and rotated, we assessed the accuracy of published radiographic methods for measuring migration prosthetic acetabular components compared results with a new method. The line linking margins was significantly more accurate proximal than teardrop, sacroiliac or sacroiliac-symphysis line. For medial migration, tangential to brim through horizontal mid-point obturator foramen Kohler's line, ilio-ischial iliopubic In combination, two lines can give assessment erosion previous methods, since they are less affected by differences in rotation commonly found series radiographs.