Fig. 4A–D.

Scope view inside the acetabulum of a 19-year-old man (martial arts performer) with a huge flap is shown: (A) View just after beginning of traction. (B) Huge mobile flap of cartilage. This large flap is not removed. (C) The labrum is first fixed with two suture anchors and the flap is fixed to the labrum with nonabsorbable monofilament (Prolene 5–0; Ethicon). The osteochondroplasty of the femoral head neck junction can then be performed with a chisel or burr. (D) This young patient had a very good result (NAHS improvement: 35 to > 95) at 55 months. 1 = femoral head, 2 = cartilage flap, 3 = labrum, 4 = anchor to refix he labrum, 5 = osteochondroplasty at the head neck junction.