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Fig 4. The effect of simulated sacroplasty on fracture gap micromotion in an FEM of the fractured hemisacrum is shown. In this simulation, single nodes on each side of the sacral fracture are selected near the point of fracture propagation and internodal distance measured after the application of a 35-kg load pre- and postsacroplasty. Fracture-gap micromotion is decreased by 48% after simulated sacroplasty, as compared with the nonfused fractured sacrum.
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