Intertrochanteric osteotomy using a dynamic hip screw for femoral neck nonunion.

The dynamic hip screw, which is routinely used for intertrochanteric hip fractures, also provides a technically simple means of fixation for intertrochanteric valgus osteotomies in the treatment of femoral neck nonunions. Eight patients underwent intertrochanteric valgus osteotomy for femoral neck nonunion using a dynamic hip screw for fixation. One patient died 4 months postoperatively of causes unrelated to the procedure. The remaining 7 patients were followed for an average of 24 months postoperatively. The nonunion healed in all 7 cases. The average angle of the fracture plane decreased from 68 degrees to 41 degrees. All the hip fractures were classified as Pauwels type III preoperatively and Pauwels type II postoperatively. The average Harris Hip Score increased from 24 to 73. On radiographic review, no cases of osteonecrosis were identified postoperatively.