Long-Term Outcome of Valgus Osteotomy and Fixation with Double Angled Dynamic Hip Screw for Nonunion Fracture of the Neck of the Femur in Young Adults.

Objective  To evaluate the long-term results of valgus intertrochanteric osteotomy fixed with double angled dynamic hip screw for nonunion fracture of the neck of the femur in young adults. This implant allows more freedom of fixation in the sagittal plane. Very few studies have evaluated the long-term outcome for treatment of nonunion in fractures of the neck of the femur. Methods  This is a prospective interventional study that included 20 patients with nonunion of the fracture of the neck of the femur aged < 60 years old without avascular necrosis of the head and significant resorption of the neck of the femur. A lateral closing wedge osteotomy was performed just above the lesser trochanter after inserting the Richard screw across the nonunion site, and it was fixed with a double-angle 120° barrel plate. The outcome was evaluated using union rate and the Harris Hip Score for functional outcome. Results  The average postoperative decrease in the Pauwels angle was of 28.9°. A total of 80% of the cases progressed to union within a mean duration of 7.53 months. The mean Harris Hip Score at the final follow-up was 86.45. Conclusion  Valgus intertrochanteric osteotomy and fixation with a double angled dynamic hip screw is a reliable and effective method for preservation of head and promoting union in an ununited fractured neck of the femur in young patients.