Fig. 2From: Compressive buttress compared with off-axial screw fixation for vertical femoral neck fractures in young adults: a prospective, randomized controlled trialFlow diagram showing trial recruitment, randomization, and follow-up. FNF, Femoral neck fracture; HHS, Harris hip score; ANFH, avascular necrosis of femoral head; ISS, injury severity score; CBS, compressive buttress screw; OPTCS, off-axis partial threaded cannulated screwBack to article page