Fixation of the mobile fragment in periacetabular osteotomy: a clinical study of two- vs. three-screw fixation with 4-week partial weight bearing

The results emphasize the inherent stability of the PAO construct and demonstrate that the use of two screws for fixation of the mobile fragment is sufficient in PAO surgery, provided that the fragment was fully mobilized during surgery and at least 50% bony contact on the iliac wing was achieved. Furthermore, a 4 week partial weight bearing regimen is also adequate during the healing phase.