Fixation Failure of Proximal Femoral Nail Anti-rotation in Femoral Intertrochanteric Fracture / 대한고관절학회지

ABSTRACT

PURPOSE: The aim of this study was to identify the causes of fixation failure and evaluate prophylactic methods in femoral intertrochanteric fractures treated with proximal femoral nail anti-rotation. MATERIALS AND METHODS: Between 2006 and 2010, this study evaluated 80 cases(20 men and 60 women) of femoral intertrochanteric fracture treated with proximal femoral nail anti-rotation after a minimum follow-up of 1 year. The mean age and follow-up period was 72.6 years and 2.1 years, respectively. The factors that could affect fixation failure, such as osteoporosis, fracture pattern, reduction status and position of helical blade on the femoral head, were analyzed retrospectively. RESULTS: Six cases of fixation failure were encountered 4 cases of cut out of the helical blade, 1 case of excessive varus union and 1 case of hip joint pain due to the excessive sliding of helical blade. The reduction status and position of the helical blade on the femoral head showed a significant association with the fixation failure, and there were 2 cases of osteonecrosis of the femoral head at the latest follow-up. CONCLUSION: Fixation failure was increased significantly in the case of non-anatomical reduction or superior position of helical blade in the femoral head. Therefore, the concerns related to the precise anatomical reduction and central location of the helical blade will need to be solved to reduce fixation failure.