颈椎侧块螺钉内固定和椎弓根螺钉内固定的生力学稳定性比较研究  

A comparative study on cervical biomechanical stability of lateral fixation piece and pedicle screws of screw fixation

作　　者：冯灿林[1] 黄海珊[1] 黎霭云[1] 刘庆浩[1] 雷明[1] 祝城华 许国增[1] 

机构地区：[1]广州市番禺区中医院骨科,511400

出　　处：《国际医药卫生导报》2014年第7期940-942,共3页International Medicine and Health Guidance News

摘　　要：目的 比较颈椎侧块螺钉内固定和椎弓根螺钉内固定的生物力学稳定性.方法 取12具成人尸体的颈椎作为标本,于C4～C5处切断,造成颈椎不稳定模型.对标本依次行非内固定、侧块螺钉内固定和椎弓根螺钉内固定三种方式.然后进行柔韧性以及左右旋转扭矩和刚度测试,评价两种内固定术的稳定性效果.结果 在三维运动范围方面,侧块螺钉内固定比椎弓根螺钉内固定的三维运动范围有不同程度减小（P＜0.05）;侧块螺钉左右旋转的刚度比椎弓根螺钉内固定强（P＜0.05）.结论 从生物力学稳定性的角度来看,下颈椎不稳采用侧块螺钉内固定的生物力学稳定性较好.Objective To compare the cervical biomechanical stability of lateral fixation piece and pedicle screws of screw fixation.Methods The 12 cervical vertebras as experimental sample,and from C4 to C5 were cut off and caused cervical instability model.Three ways of non fixation,lateral mass screw fixation and pedicle screw fixation were implemented.Then flexibility and rotation torque and stiffness were tested.Stability of two kinds of internal fixation was evaluated.Results In the 3-D range of movement,lateral mass screw fixation was notably smaller than that of pedicle screws fixation （P ＜ 0.05）.The lateral mass screw fixation had more strength than pedicle screws fixation （P ＜ 0.05）.Conclusion The instability of lower cervical spine patients may use lateral mass screw fixation,and its biomechanical stability is better.

关 键 词：颈椎 内固定 生物力学稳定性 

分 类 号：R687.3[医药卫生—骨科学]