Mubarak et al. one-stage correction of spastic dislocated hip. A, Pericapsular acetabuloplasty is begun approximately 1 cm above lateral margin of acetabulum. B, Osteotomy proceeds in line between anterior inferior iliac spine and sciatic notch, penetrating outer wall of ilium only. Bicortical cuts are made at anterior inferior iliac spine and sciatic notch. Straight or slightly curved osteotome extends osteotomy toward triradiate cartilage, avoiding penetration of joint or inner pelvic wall. SEE TECHNIQUE 33.4.