【摘要】 研究保留椎旁肌肉情况下,下颈椎单侧关节突关节分级切除对颈椎稳定性的影响,为临床手术提供理论依据。取5具新鲜山羊颈椎标本,先后分5组进行操作,即完整标本组,左侧C4-5关节突关节25%、50%、75%、100%切除组。先后测量每组每个颈椎标本在三维空间六个方位(前屈、后伸、左右侧屈、左右轴向旋转)随载荷增加而变化的活动度。最后将所得数据进行统计分析。结果表明:随关节突关节切除范围的增大,在相同载荷条件下的位移也增大,其中增长幅度最大发生在50%～75%切除组之间,增长幅度平均在46.7%(前驱、后伸、左右侧弯四个方向)和71.5%(左右轴向旋转)。在保留椎旁肌肉情况下,单侧关节突关节切除范围大于50%时,颈脊柱稳定性丧失。更多还原

【Abstract】 To study the stability after lower cervical facet joint graduted excision and provide a theoretical basis for clinical surgery 5 goat cervical vertebrae were devided into 5 groups(Intact specimen group,groups with the 25%、50%、75%、100%excision of C4-5 left facet joint)and gave different load from six directions(flexion,extension,left and right lateral bending, left and right axial rotation),then measured the activity under each load.These datas getting from experiment were aralyzed in statistics.As the scope of facet joint excision increasing,in the same load condition,the cervical′s activity also increased,the highest growth occurred in 50%～75% excision group and the average growth rate was 46.7%(flexion,extension,left and right lateral bending four directions) and 71.5%(left and right axial rotation).It proves taht when the extent of unilateral facet join excision is greater than 50%,cervical spinal stability lost.更多还原