A, Trochanteric osteotomy exits proximally just anterior to most posterior attachment of gluteus medius, preserving capsular branch of medial femoral circumflex artery. B, Hip capsule is exposed above level of piriformis by dissecting gluteus minimus off capsule while displacing trochanteric fragment anteriorly. C, Z-shaped capsulotomy is performed. D, Hip is dislocated anteriorly while placing leg in sterile drape pouch over anterior side of operating table and cutting ligamentum teres. E, Labrum is reflected off overhanging acetabulum. F, Excessive bone is trimmed with osteotome or burr, and intact labrum is reattached with suture anchors if possible. G, Labrum is reattached with suture anchors. H, Burr is used to recontour head-neck junction. I, Clear plastic spherometer can be used to judge point where femoral head becomes aspherical and to guide extent of osteochondroplasty. SEE TECHNIQUE 6.1.