摘要
目的:比较枢椎椎板螺钉与枢椎椎弓根螺钉的抗拔出强度,为临床应用枢椎椎板螺钉固定提供生物力学依据。方法:在7具成年男性新鲜尸体枢椎标本上进行枢椎单皮质椎弓根螺钉和双皮质椎板螺钉固定,测试螺钉拔出力。结果:单皮质枢椎椎弓根螺钉的最大拔出力平均为875.3±403.2N,双皮质枢椎椎板螺钉的最大拔出力平均为679.5±308.2N;椎弓根螺钉的最大拔出力大于椎板螺钉,但二者之间无统计学差异。结论:枢椎椎板螺钉进行双皮质固定具有可靠的力学固定强度,可作为枢椎椎弓根螺钉的补充固定技术。
Objective：To evaluate the pull-out strength of C2 trans-laminar screws and C2 pedicle screws, and provide the biomechanical basis for clinical application of posterior C2 screw fixation techniques.Method： The unicortical pedicle screws and bicortical trans-laminar screws were placed in seven fresh C2 specimens, and the pull-out strength of the screws in each specimen was tested and compared.Result：The average pullout strength of unicortical C2 pedicle screw was 875.3±403.2N,the mean pull-out strength of bicortical C2 trans-laminar screw was 679.5±308.2N,the pull-out strength of pedicle screw was higher than that of translaminar screw,but there was no statistically significant difference between them.Conclusion：C2 trans-laminar screw possesses a reliable strength when placed bicortically,it can be used as a supplemental fixation method to C2 pedicle screw fixation technique.
出处
《中国脊柱脊髓杂志》
CAS
CSCD
2007年第2期137-139,共3页
Chinese Journal of Spine and Spinal Cord
基金
广东省医学科研基金项目(A2005503)
广东省自然科学基金团队项目(20023001)
