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Biomechanical Analysis of Intervertebral Cement Extravasation in Vertebral Motion Segments

机译:椎体段椎间水泥外渗的生物力学分析

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摘要

Kyphoplasty is a therapeutic option for pain relief in the setting of compression fractures. Cement extravasation into adjacent disks is a common occurrence. The biomechanical and clinical consequences of cement in the disks currently are unknown. This study investigated the biomechanical effects of cement extravasation into the intervertebral disk in a human cadaveric model. Seven thoracolumbar and lumbar embalmed human cadaveric motion segments were evaluated in axial rotation, right and left lateral bending, and flexion and extension. Stiffness was calculated at baseline and following injection of 1 mL of cement into the intervertebral disk. There was a 13.4% (P=.041) increase in stiffness in axial rotation compared with preinjection motion segments. No significant difference was observed in lateral bending or flexion and extension. In this model, cement extravasation into the disk space increased stiffness in axial rotation.
机译:脑膜成形术是一种治疗选择,可在压缩骨折上进行疼痛缓解。 将水泥外向进入相邻磁盘是一个常见的发生。 磁盘上的水泥的生物力学和临床后果是未知的。 本研究研究了水泥外渗到人尸体模型中椎间盘的生物力学效应。 在轴向旋转,右侧和左侧弯曲和屈曲和延伸方面评估七位胸腰带和腰椎嵌入的人尸体运动区段。 在基线下计算刚度,并在将1ml水泥注射到椎间盘中。 与预注释运动段相比,存在13.4%(p = .041)轴向旋转中的刚度增加。 在横向弯曲或屈曲和伸展中没有观察到显着差异。 在该模型中,水泥外向进入磁盘空间的轴向旋转刚度。

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