Fig. 4
From: A novel Z-shaped anti-rotation rod for atlantoaxial dislocation reduction: finite element analysis
Stress distribution nephograms of the vertebral body-implants contact surfaces (PS + CR vs. PS + ZR) in six motion states. PS = pedicle screw; CR = common rod; ZR = Z-shaped rod. Bending-L = Left lateral bending; Bending-R = Right lateral bending; Rotation-L = Left rotation; Rotation-R = Right rotation