A, Acute transiliac lengthening accomplished by modification of Salter technique. Instead of triangular graft, square or trapezoidal graft is used. Lengthening is greater with larger grafts. B, Acetabular dysplasia and mild limb-length inequality. Pelvic obliquity results in compensatory scoliosis. In middle figure, block has been placed beneath shorter leg. Although this balances pelvis and straightens spine, it causes acetabulum to be even more vertical. On right, transiliac lengthening has been performed to improve femoral acetabular coverage and regain length. C, Transiliac lengthening with trapezoidal graft. SEE TECHNIQUE 29.44.