Irie T, Orías AAE, Irie TY, et al. - This study was attempted to compare the acetabular coverage between dysplasia, borderline dysplasia, and control acetabulum in a quantitative 3-dimensional manner and to test the associations between the radiologic parameters and the 3-dimensional zonal-acetabular coverage. Researchers examined contralateral hip CT images of patients 16 to 60 years of age who had undergone 1 of 3 types of surgeries: eccentric rotational acetabular osteotomy, curved intertrochanteric varus osteotomy, and total hip replacement with minimum 1-year follow-up between January 2013 and April 2018. Pearson’s correlation coefficient was applied to examine the relationships between the ZAC in each zone and the lateral center-edge angle. It was reported that in the borderline dysplastic acetabulum, the anterosuperior acetabular coverage is more similar to the dysplastic acetabulum than to the normal acetabulum.