【摘要】 目的 寻求具有坚强的生物力学强度、价格低廉、适用于国人下颈椎前路手术的内固定器。 方法 根据国外颈椎带锁钢板(cervical spine locking plate，CSLP)特点，并加以改进设计一种内固定器。用16具新鲜猪颈椎制作颈椎损伤失稳模型并随机分成两组，将所设计内固定器与传统AO“Ⅰ”形钢板进行生物力学实验比较。 结果 所设计内固定器固定组以C 3 ～C 5 节段前屈、后伸、轴向旋转和侧弯方向的平均运动范围(ROM)较“Ⅰ”形钢板固定组分别缩小了48.6%(P<0.01)、48.3%(P<0.05)、46.5%(P<0.01)、52.1%(P<0.01)。 结论 所设计内固定器在提供失稳脊柱即时稳定性方面优越于“Ⅰ”形钢板，为内固定器应用于临床提供科学依据。

    关键词 内固定器 下颈椎 前路 生物力学测试

    Design and biomechanical analysis of anterior low cervical spine(C3 ～C7 )internal fixation

    Li Cheng，Xi Guangqing，Huang Jianming，et al.

    Department of Orthopedics，The Center Hospital of Nanhui District，Shanghai201300.

    【Abstract】 Objective To explore an anterior low cervical spine internal fixation of high rigidity low price and being suitable for Chinese.Methods A new fixation had been designed taking the advantage of cervical spine locking plate made abroad.16fresh cervical spine specimens destabilized with C 4 reconstructed with anterior bone graft were randomly divided into2groups:control and test group.Control group was stabilized by common AO“Ⅰ”type plate，whereas test group were treated with new fixation.Biomechanical test was made to compare the effect of these two fixa-tions.Results Compared with control group ......