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前后路经C_(1、2)关节突螺钉固定后生物力学比较 被引量:2

Biomechanical evaluation of spinal stability of anterior and posterior approach for atlanto-axial transarticular screw fixation
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摘要 目的比较前后路经C1、2关节突螺钉固定的效果,并测定经双侧关节突螺钉固定后的稳定性,为临床操作提供理论依据。方法采用南方医科大学解剖教研室提供的8具新鲜冷冻人体颈椎标本(包括颅底骨-T1椎体),切断寰椎横韧带和齿状突,制成寰枢关节不稳损伤模型,每个标本分别行正常标本、寰枢关节不稳标本、前路双侧C1、2关节突螺钉固定标本及后路双侧C1、2关节突螺钉固定标本行三维运动范围测定。结果所有内固定组的三维运动范围均明显小于损伤组及完好组,前路经C1、2关节突螺钉和后路经C1、2关节突螺钉固定的稳定性无明显差异。结论前、后路双侧经C1、2关节突螺钉固定后明显提高椎体三维稳定性,是临床上可靠的固定方法。 Objective To compare the effect of atlanto-axial transarticular screw fixation through the anterior and posterior approach. To quantify the stability of bilateral atlantoaxial transarticular screw fixation, and to provide theoretical basis for clinical applications. Methods Eight fresh complete human cervical specimens from the department of anatomy, Southern Medical University were obtained (basis cranii and T~ vertebra should be included). Each specimen should receive a 3-D range of movement (ROM) test (normal group). Then the model of instable atlanto-axial injury was set up by transection of transverse ligament of atlas and the dens. Each specimen should undergo 3-D ROM test for three times. According to the recording timing, the data was divided into three groups: the injury group (pre-operation group), the anterior approach group and the posterior approach group. The data in the latter two groups were recorded when received an anterior and posterior bilateral atlantoaxial transarticular screw fixation respectively. Results The ROM of the internal fixation groups was obviously smaller than the normal group and the injury group. However, there's no significantly statistic difference within the internal fuxation groups. Conclusion Both the anterior and the posterior bilateral atlantoaxial transarticular screw fixation techniques are capable of increasing the 3-D stability of the vertebral column. They're trustworthy approaches for treatment of atlanto-axial instability in clinic.
出处 《中国骨与关节损伤杂志》 2013年第11期1001-1003,共3页 Chinese Journal of Bone and Joint Injury
基金 宁波市社会发展科研项目(2009C50010)
关键词 经关节突螺钉 内固定 前后路 生物力学 Transarticular screw Internal fixation Anterior and posterior approach Biomeehanics
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