Fig. 16From: Topping-off surgery vs posterior lumbar interbody fusion for degenerative lumbar disease: a finite element analysisStress distribution of the K-ROD (pedicle screw) in PLIF surgical model for various motions. a, b Maximum von Mises equivalent stress on K-ROD (pedicle screw) in standing posture. c Maximum von Mises equivalent stress on K-ROD (pedicle screw) in anteflexion. d Maximum von Mises equivalent stress on K-ROD (pedicle screw) in extension. e Maximum von Mises equivalent stress on K-ROD (pedicle screw) in right bending. f Maximum von Mises equivalent stress on K-ROD (pedicle screw) in left bending. g Maximum von Mises equivalent stress on K-ROD (pedicle screw) in left rotation. h Maximum von Mises equivalent stress on K-ROD (pedicle screw) in right rotationBack to article page