| 脊柱失稳节段经椎弓根螺钉内固定器固定后对邻近节段三维运动的影响 |
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Received:December 21, 2001
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| 期刊信息：《中国骨伤》2002年15卷，第11期，第668-670页 |
| DOI：doi:10.3969/j.issn.1003-0034.yyyy.nn.zzz |
| 基金项目:浙江省自然科学基金资助项目(编号:399060) |
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目的:研究经椎弓根螺钉内固定器固定脊柱失稳节段后对邻近节段三维运动范围的影响。
方法:在7例新鲜成人尸体T10～L4脊柱标本上,模拟L1骨折后安放经椎弓根螺钉内固定器,在100N·m载荷下进行三维运动测试。分析脊柱固定阶段(T12～L2)、邻近节段(T11～T12、L2～L3)和总节段(T11～L3)的前屈、后伸、轴向旋转和侧弯运动范围。
结果:经椎弓根螺钉内固定器固定后能使固定节段屈伸、侧弯运动方向上运动范围减少,轴线旋转运动恢复至正常完整节段运动范围。但同时邻近节段屈伸、侧弯运动运动范围增加,轴向旋转运动范围无明显变化。固定后总节段比正常完整总节段屈伸、侧弯运动运动范围增加,轴向旋转运动范围无明显变化。
结论:经椎弓根螺钉内固定器固定使邻近节段屈伸和侧弯运动范围代偿性增加,但不能代偿丢失的运动范围,对邻近节段的轴向旋转无明显影响。 |
| [关键词]:生物力学 脊柱 内固定器 关节不稳定性 |
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| The effcet of pedicle screw divice fixation on three dimensional movement of adjacent segments in thoracolumbar spine |
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Abstract:
Objective:To study the changes of three dimensional movements of adjacent segments of the thoraco lumbar spine induced by pedicles screw device fixation
Methods:A model of L1 body fracture was produced on seven specimens of fresh adult cadaver spine from T 10 to L 4.A pedicle screw device was applied in the spectimen to strengthen the injured level.Ranges of three dimensional movements of fixed segments (L12 ～L2),adjacent segment (L11 ～L12 ?L2～L3)and whole segments(L11 ～L3) were measured in intact,injured and the stabilized specimens.
Results:Although the pedicle screw device was found to provide significant stability for injured segment in flexion extension,lateral bending and restore stability to levels similar to those of an intact spine in axial rotation and at the same time the device increased the range of motion of the adjacent vertebral leval yet,there was a reduction of the range of motion of whole segment on flexion extension and lateral bending when compared with those of the intact spine.
Conclusion: Application of the pedicle screw device increase the range motion of flexion extension and lateral bending in adjacent segments which cannot compensate for the loss of those range of motion and have no influence on axial rotation. |
| KEYWORDS:Biomchanics Spine Internal fixators Joint instability |
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| 引用本文，请按以下格式著录参考文献： |
| 中文格式: | 王向阳,徐华梓,池永龙.脊柱失稳节段经椎弓根螺钉内固定器固定后对邻近节段三维运动的影响[J].中国骨伤,2002,15(11):668~670 |
| 英文格式: | WANG Xiang yang,XU Hua zi,CHI Yong long.The effcet of pedicle screw divice fixation on three dimensional movement of adjacent segments in thoracolumbar spine[J].zhongguo gu shang / China J Orthop Trauma ,2002,15(11):668~670 |
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