Evaluation of the neck shaft angle after DHS fixation in intertrochanteric hip fractures

Abstract

Introduction: The characteristic morphology of the proximal extremity of the femur and the muscle balance of the hip are factors that make weight bearing possible among patients. Restoration of neck shaft angle is as important as union because if neck shaft angle is not restored, it can lead to disability. Recent studies have been conducted with the intention of showing the relationship between fracture of the proximal extremity of the femur and the anatomical configuration of the hip. This study was a prospective one to evaluate neck shaft angle after DHS fixation in intertrochanteric fractures. Patients and Method: Prospective study done on 25 (13males and 12 females) patients who were operated by a single surgeon. Evaluation of neck shaft angle in non-fractured side and the restoration/change in neck shaft angle on the operated side after surgical fixation with DHS, radiographs taken with both hips in 15 degrees of internal rotation.Result: All fractures got united, average age of patients was 58 years, varus malunion in 2 cases and valgus in 4 cases. Average NSA on normal side was 136±4 and on operated side it was 126±4 degrees.Conclusion: The neck-shaft angle is the most important parameter after fixation of intertrochanteric fracture by DHS, we must preserve the near normal angel after fixation to avoid valgus and varus malunion.