颈椎前路带锁与非带锁钢板螺钉系统固定强度的比较

目的：比较带锁与非带锁颈椎前路钢板螺钉系统的即刻固定和抗疲劳强度。方法：采用CSLP和Orion两种颈椎前路带锁钢板与Acroplate非带锁钢板固定于新鲜羊颈椎椎节，测定其即刻固定强度、抗疲劳强度和钢板螺钉的抗拉出力。结果：锁定状态的CSLP和Orion系统的即刻固定强度和抗疲劳强度均显著高于各自非锁定状态及Acroplate钢板单侧皮质螺钉固定。带锁钢板和相同螺钉长度的非带锁钢板的螺钉抗拉出力无明显差别。结论：锁定机制提高了颈椎前路钢板螺钉的即刻固定强度和抗疲劳强度。

The Comparison of the Fixation Strength of Locking and Non-locking Anterior Cervical Plate Systems

Objective: To compare the fixation strength of locking and non locking anterior cervical plating initially and after fatigue.Methods:AO Cervical Spine Locking Plate(CSLP),Danek Orion plate and AcroMed Acroplate were fixed on lamb cervical spine.The fixation strength and pull off strength of the screw plate constructions was performed initially and after fatigue.Results:Locked CSLP and Orion constructions were more rigid than all unlocked unicortical systems initially and after cyclic loading.There was no significant difference in pull off strength between the CSLP,the Orion,and the unicortical Acroplate.Conclusions:Locking mechanism significantly increased the strength of the tested screw plate systems initially and after fatigue.