The influence of sagittal pelvic malrotation on transverse acetabular ligament guided cup orientation: a retrospective cohort study

摘要

Measurements of the angles of inclination and anteversion on standing anteroposterior pelvic radiographs. The angle of inclination is the angle between the large diameter of the opening ellipse (b) and the interteardrop line (c). The angle of anteversion is the arcsine of the ratio of the small (a) and the large radius (b) of the opening ellipse, (= arcsin(a/b))