Fig. 14

Stress distribution of the Coflex in Coflex surgical model for various motions. b Maximum von Mises equivalent stress on Coflex in standing posture. a, c: Maximum von Mises equivalent stress on Coflex in anteflexion. d Maximum von Mises equivalent stress on Coflex in extension. e Maximum von Mises equivalent stress on Coflex in right bending. f Maximum von Mises equivalent stress on Coflex in left bending. g Maximum von Mises equivalent stress on Coflex in left rotation. h Maximum von Mises equivalent stress on Coflex in right rotation