Fig. 6From: Compressive buttress compared with off-axial screw fixation for vertical femoral neck fractures in young adults: a prospective, randomized controlled trialTwo distinct configurations of OPTCS fixations. Trochanteric transverse screw, uni-cortical fixation of OPTCS (upper) and calcar cortex screw, bi-cortical fixation of OPTCS (lower)Back to article page