Table 1.
Comparison of conventional RAO with our surgical procedure
| Parameter | Conventional RAO | Our procedure |
|---|---|---|
| Length of skin incision (cm) | ≥ 20–30 | 10–15 |
| Number of incisions of the fascia lata | Two | One incision or a y-shaped incision just below the skin incision |
| Transtrochanteric approach (trochanter osteotomy) | No | Yes |
| Detachment of the medial gluteal muscle from the ilium | Yes, partially, 7- to 10-cm width from the anterior superior iliac spine* | No |
| Detachment of the rectus femoris muscle | Yes, completely | No |
| Division of the external short rotator muscles | Yes, completely | None except for the piriformis |
| Thickness of the osteotomized acetabulum cephalad to the joint space (cm) | 1.5*–2.5† (1* to 1.5† finger breadths) | 2.5 (1.5 finger breadths) |
| Bone graft for gap between the osteotomized acetabulum and the ilium | Yes; one or two trapezoidal bone grafts from the outer table of the iliac wing | Yes; one trapezoidal bone graft from the lateral part of the osteotomized acetabulum |