摘要
目的:评价寰枢椎后路椎弓根螺钉固定的生物力学稳定性。方法:6具新鲜颈椎标本,按随机顺序,对每一标本先后行C1-C2椎弓根螺钉、Magerl螺钉、Brooks钢丝以及螺钉联合钢丝固定,在脊柱三维运动实验机上测量其三维运动范围。结果:Magerl螺钉或C1-C2椎弓根螺钉联合Brooks钢丝组成的固定系统的三维运动范围最小。C1-C2椎弓根螺钉固定的前后屈伸运动范围与Brooks钢丝固定无差异,但大于Magerl螺钉;其左右侧屈运动范围小于Brooks钢丝固定,大于Magerl螺钉;其轴向旋转角度明显小于Brooks钢丝固定,但与Magerl螺钉无统计学差异。结论:C1-C2椎弓根螺钉的三维稳定性与Magerl螺钉相当,联合Brooks钢丝固定可进一步提高其稳定性。
Objective:To evaluate the biomechanical stability of C1-C2 pedicle screw fixation technique for atlantoaxial instability.Method:Six atlantoaxial complex fresh specimens,according to a random sequence,each was fixed using C1-C2 pedicle screw fixation technique,Magerl screw technique,Brooks wiring technique and screw-wiring combined technique,then biomechanical data(range of motion,ROM) were measured.Result:Either Magerl screws or C1-C2 pedicle screws combined with Brooks wiring got the lowest three dimensional movements of the fixation techniques.The ROM of C1-C2 pedicle screw fixation,in anterior-posterior direction,equivalent to Brooks wiring and bigger than Magerl screw;lower than Brooks wiring and bigger than Magerl screw.The dynamic range of C1-C2 pedicle fixation in lateral bending,and axial rotation were lower than Brooks wiring but no statistic significance comparing with Magerl screw.Conclusion:The biomechanical stability of the C1-C2 pedicle screw fixation technique equivalent to that of Magerl screw technique,combined with the wiring fixation would enhance the stability of the technique.
出处
《中国脊柱脊髓杂志》
CAS
CSCD
2003年第12期735-738,共4页
Chinese Journal of Spine and Spinal Cord
基金
广东省科技重点计划项目(编号:A302020401)
