RESUMO
Fracture neck of femur is a devastating injury. One of its main complications is avascular necrosis [AVN] of the femoral head. For the fixation of femoral neck fractures, cannulated screws are now universally used. The aim of the study was to determine the frequency of avascular necrosis in fracture neck of femur fixed with cannulated screws. Descriptive cross sectional study. Orthopedic unit of Ayub Teaching Hospital Abbottabad. 7[th] March, 2011 to 6[th] September, 2011. Recruiting 113 patients of either gender between 15 to 60 years of age with fracture neck of femur who were fixed with cannulated screws. The data was entered and analyzed with the help of SPSS 10. There were 113 patients with an overall mean age of 43.51 years +/- 11.94SD. Maximum number of patients was 56 [49.50%] from the age group of 46 to 60 years. Avascular necrosis was noted in 23 [20.35%] cases. The maximum number of patients with avascular necrosis was 13 [56.52%] belonging to the age group of 15 to 25. Avascular necrosis was high in younger ages in displaced fractures of neck of femur treated with cannulated screws