多爪钳夹式颈椎固定器的生物力学测试及临床应用

Biomechanical Study and Clinical Application of Multiclaw Cliplike Cervical Spinal Fixator

目的 提高颈椎内固定的效果。方法自行设计一种新型的脊柱固定器(MCSF)。经临床治疗下颈椎损伤15例，并用10具新鲜尸体脊柱标本(C1～T1)进行力学测定，比较MCSF、关节突钢板及正常脊柱的生物力学特性。结果在抗轴向压缩、弯曲及旋转应力方面，MCSF明显优于关节突钢板及正常脊柱。而临床应用显示术后颈椎的生理曲线和伤椎高度完全得到恢复，平均随访时间24.3个月，未见固定器松脱及畸形矫正度丢失现象。结论MCSF符合生物力学原理，有良好的固定作用，手术操作安全简便，是颈椎后路理想的固定器之一，值得推广应用。

Objective To improve the results of treatment for cervical spine injury with a new device Methods A new device, multiclaw cliplike spinal fixator(MSCF) was designed by authors The experiments were performed on 10 cadaveric cervical spines to compare the biomechanical characteristic of MCSF, articular process plate and the intact Spines Fifteen cases of lower cervical spine injury were treated with MCSF Results MCSF had advantage over the articular process plate and the intact spines in anti axial compression, anti bending and anti rotation In the 15 cases the cervical spine normal carvature and the height of the vertebra injuried had been restored after operation The follow up of 24 3 months showed there were no loosening of the device, recurence of deformation and so on Conclusion MCSF posseses adequate strength and good stability and the technique is simple and safe The authors consider this device is one of ideal fixators for cervical spine and is worthy recommending