枢椎后路椎板螺钉固定技术的可行性研究

目的:观察和测量国人枢椎椎板以获取形态学参数,探讨枢椎后路椎板螺钉固定的可行性及进针技术.方法:用电子游标卡尺、量角器测量28套正常成年人枢椎新鲜标本的相关参数,包括上位和下位椎板螺钉进针点距椎板上缘距离、枢椎椎板上、中、下部的厚度.枢椎椎板高度、上位和下位椎板螺钉的长度和进针角度、进针点至椎动脉孔及下关节突中心点距离等14项指标.并对测得的数据进行统计学分析.结果:上位和下位椎板螺钉进针点距椎板上缘距离分别为4mm和8 mm,枢椎椎板上、中、下部的厚度分别为3.2、6.7、5.5 mm,椎板高度为12.8mm,上位和下位椎板螺钉的长度分别为26.2mm和25.5mm.结论:枢椎后路椎板螺钉固定技术在国人解剖学上具有可行性,枢椎椎板螺钉固定可作为枢椎后路固定技术的补充.

The feasibility study of posterior laminar screw fixation techniques in axis

Objective: Observation and measurement were done on axial laminar to get the parameters of morphology in Chinese. To evaluate the possibility of the placement of axial laminar screw. Methods: The relative parameters of 28 sets of fresh Chinese adults' axial specimens were measured with a digital caliper,a goniometer and imageology,including the distance from superior and inferior the anchor point of the axial laminar screw to superior margin of the axial laminar,the superior,middle and inferior thickness of axial laminar,the height of axial laminar,the length and the angle of the axial laminar screw trajectory,the distance from the anchor point of the axial laminar screw to hole of vertebral artery and the central point of inferior articular process and so on. The data were statistically analyzed. Results: The distance from superior and inferior the anchor point of the axial laminar screw to superior margin of the axial laminar was 4 mm and 8 mm respectively. The superior,middle and inferior thickness of axial laminar was 3.2,6.7,5.5 mm respectively. The height of axial laminar was 12.8 mm. The superior and inferior length of axial laminar screw trajectory was 26.2 mm and 25.5 mm respectively. Conclusion: It is feasible and reliable for posterior laminar screw fixation techniques of axis in Chinese. C₂ laminar screw fixation techniques could be used as a supplementary method for conventional posterior screw fixation techniques of C₂.