摘要
目的:探讨棘突间稳定装置CoflexTM单节段固定后对固定及邻近节段活动度的影响。方法:选取6具新鲜成人尸体脊柱标本(L1~S1段),进行前屈/后伸、左右侧弯/旋转6个运动方向的稳定性测试,计算L2/3,L3/4和L4/5的三维运动范围(ROM)和中性区(NZ),分别比较完整标本(a);CoflexTM固定L3/4(b);L3/4双侧部分失稳(c);c+b(d)4种状态下3个节段的活动度。结果:ROM值:L3/4前屈时状态b<a,d<c(P<0.01),后伸时状态b、d<a、c(P<0.01),旋转时状态b<a、d<c(P<0.05);L2/3和L4/5后伸时状态b、d>a、c(P<0.05),前屈及旋转时无差别(P>0.05);侧弯时3个节段4种状态下均无差别(P>0.05)。结论:CoflexTM可以限制固定节段的前屈、后伸和旋转运动,使上下各一个邻近节段后伸活动度增加,前屈和旋转活动度无变化;对侧弯活动度均无影响。
Objoctive: To discuss the effects of single Coflex^TM interspinous fixation on stability of the implanted and adjacent segments of lumbar spine under 3D motions. Mothods: The ranges of the motion of 6 fresh adult human cadaveric lumbar spine specimens (L1-S1) were biomechanically tested for forward flexion/ extention stretch, left/right lateral bending and left/right axial rotation. The range of motion (ROM) and neutral zone (NZ) of segment L2/3,L3/4,L4/5 were measured and compared at four conditions: a: intact; b: segment L3/4 stabilized with Coflex^TM device; c: partial destabilization; d: segment L3/4 stabilized with Coflex^TM device and partial destabilization. Rosults: The ROM of segment L3/4 for a, b and d were less than that of c during the forward flexion (P〈0.01), and for b and d were less than that of a and c during the extention stretch(P〈0.01), while for b was less than that of a and d, for a and d were less than that of c during the left/right axial rotation (P〈0.05). The ROM of segment L2/3 and L4/5 for b and d were more than that of a and c during the extention stretch (P〈0.05), but had no difference during the forward flexion and left/right axial rotation (P〉0.05). The ROM of three segments of four conditions had no difference during left/fight lateral bending (P 〉0.05). Conclusions: The implanted segment of lumbar spine specimen can be stabilized by the CoflexTM device in forward flexion/extention stretch and left/right axial rotation. The motion of superior and inferior segments increased in extention stretch but had no changes happened in forward flexion and left/right axial rotation after middle segment implanting with the Coflex^TM device. The Coflex^TM device have no effect on the implanted, the superior and inferior segments in lefl/right lateral bending.
出处
《中国临床解剖学杂志》
CSCD
北大核心
2009年第3期333-336,共4页
Chinese Journal of Clinical Anatomy