CAJ | 학술논문

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.
목적 비교경추측괴라정내고정화추궁근라정내고정적생물역학은정성.방법 취12구성인시체적경추작위표본,우C4～C5처절단,조성경추불은정모형.대표본의차행비내고정、측괴라정내고정화추궁근라정내고정삼충방식.연후진행유인성이급좌우선전뉴구화강도측시,평개량충내고정술적은정성효과.결과 재삼유운동범위방면,측괴라정내고정비추궁근라정내고정적삼유운동범위유불동정도감소(P＜0.05);측괴라정좌우선전적강도비추궁근라정내고정강(P＜0.05).결론 종생물역학은정성적각도래간,하경추불은채용측괴라정내고정적생물역학은정성교호.
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.