目的：研究单节段脊柱后部结构对腰椎三维运动稳定性的影响。
Objective To study of the effect of monolength posterior structure on stability of lumbar spine 3D movement.
目的探索一种快速、精确的建立腰椎三维有限元模型的简便方法。
Objective To explore a fast and precise method for the establishment of three-dimensional finite element model of lumbar.
主要结局观察：成功建立了腰椎运动节段的三维模型和有限元模型。
MAIN OUTCOME MEASURES: The three dimensional model and finite element model of lumbar spine were successfully established.
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