Three-dimensional computed tomography analysis on bony birth canal after bilateral periacetabular osteotomy

Based on 3D-CT analysis, the narrowest part of the bony birth canal after bilateral CPO was the pelvic teardrop. In this study, 82.8% of the patients showed pelvic teardrop diameter greater than 95 mm, while that of the other patients (17.2%) were less than 95 mm.