Fig. 2From: Biomechanical effect of pedicle screw distribution in AIS instrumentation using a segmental translation technique: computer modeling and simulation a Reference screw pattern (bilateral screws at every level fused). b Screw pattern with convex alternate screw dropouts. c Concave alternate screw dropouts. d Convex periapical screw dropouts. e Concave periapical screw dropoutsBack to article page