Internal spinal fixator stiffness has only a minor influence on stresses in the adjacent discs.


STUDY DESIGN Stresses in vertebral endplates and discs were calculated using the three-dimensional nonlinear finite-element model of a lumbar spine with an internal spinal fixation device. OBJECTIVE To determine the influence of fixator stiffness on stresses in the adjacent discs. SUMMARY OF BACKGROUND DATA There are few computer models of the lumbar… (More)


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