A, Femoral neck osteotomy. Two parallel cuts made (dashed lines) and “napkin ring” segment removed with a threaded pin. Femoral head is then removed with corkscrew. B, Retractors placed inferior to transverse ligament and also posteriorly to retract femur. (A redrawn from Biomet. B redrawn from Depuy.) SEE TECHNIQUE 3.7.