An evaluation of treating non-union of femoral neck fractures with valgus angulation osteotomy using sliding hip screws.

This study presents the outcomes of patients treated with non-union of femoral neck fractures healed with valgus osteotomy, fixed with a Dynamic Hip Screw (DHS). The study retrospectively evaluated 16 patients who, between 2007 and 2014, developed pseudarthrosis following treatment for a femoral neck fracture and who were treated with DHS-osteosynthesis, after a valgus subtrochanteric osteotomy. Postoperative clinical evaluation of the patients was done? using the Harris Hip Scoring (HHS) system. Union of both the fracture and the osteotomy site was achieved in 17.2 weeks (range: 14-24 weeks) in all patients. The average Pauwels angle decreased from 72o (range 62-80) preoperatively to 26o (range 20-50) postoperatively. All fractures were Pauwels type III preoperatively and 4 type II and 12 type I postoperatively. The average HHS increased from 26 (range 18-34) preoperatively to 85 (range 68-94) postoperatively. Of the patients who were followed up for a mean duration of 3.1 years (range: 1-5 years), four had 1-cm shortening. No patient developed postoperative AVN of the femoral head. For patients with non-union after femoral neck fracture, DHS-osteosynthesis after valgus osteotomy is a method with a shorter learning curve, which can be successfully performed.