摘要
采用８具新鲜尸体腰椎功能单位，通过脊柱三维运动实验机施加最大载荷为１０．０Ｎｍ的６种力偶，使脊柱产生前屈／后伸、左／右侧弯和左／右轴向旋转运动。经立体摄像计算机图像处理得到Ｌ_２～Ｌ_３节段的运动范围（ＲＯＭ）、中性区（ＮＺ）和弹性区（ＥＺ）等参数。将完整标本测量的结果为自身对照组，然后在Ｌ_２、Ｌ_３节段依次切除左侧小关节１／３、１／２、和３／３。作ｔ检验和方差分析来分析单侧小关节切除对腰椎三维运动的影响。结果表明：单侧小关节切除１／３后ＲＯＭ增加不显著（Ｐ＞０．０５），不影响脊柱的稳定；小关节全切除后后伸、左侧弯和右旋的ＲＯＭ增加显著（Ｐ＜０．０５）。小关节切除１／２后ＲＯＭ虽增加不显著，但经方差分析与小关节全切的结果无明显差异，说明小关节切除范围超过１／２将导致脊柱失稳。
The experiment was carried out with & fresh humen lumbar functional spinal unite. A threedimensional movement device with the maximum load of 10. 0Nm were applied to produce six kinds of movement to create various movement of the lumbar spine in flexion/extension,left/right lateral bendings, left/right axial rotation. The range ofmovement (ROM ),neutral zone (NZ) and elastic zone (EZ) of the L2 ￣ L3 segments were determined by using stero-photogrammetric methods. The measurements were at first done on the intact lumbar spinal segments and data obtained were used as self-control study. Then 1/3, 2/3 , 3/3 of the unilateral facets in the L2￣L3 segments were resected. At last,the three dimensional quantitative eviuation in analysis of the dffect of greded facetectomy on the mobility of the lumbar spinal segments was performed. The results revealed that: (1 )the range of motion was not affected by 1/3 facetectomy(P>0. 05), (2)the range of motion in creased after unilateral medial and total facetectomy and this made the lumbar spine unstable.Author' s address( Clinical anatomy and biomechanics laboratory of PLA , Dalian, Liaoling, 1 16017)
出处
《中国脊柱脊髓杂志》
CSCD
1996年第5期206-209,共4页
Chinese Journal of Spine and Spinal Cord
关键词
腰椎
小关节切除
稳定性
三维运动
Lumbar spine
Facetectomy
Stability
Three-dimensional
