BIOMECHANICS OF CERVICAL-SPINE FACETECTOMY AND FIXATION TECHNIQUES
BIOMECHANICS OF CERVICAL-SPINE FACETECTOMY AND FIXATION TECHNIQUES
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DOI：
10.1097/00007632-198807000-00017
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发表时间：
1988-07-01
期刊：
影响因子：
3
通讯作者：
HUSSAIN, H
中科院分区：
文献类型：
--
作者：
CUSICK, JF;YOGANANDAN, N;HUSSAIN, H
小关节面切除术，无论是单侧还是双侧，都显着改变了颈椎功能单元承受以恒定模式施加到不同标本配置的不断增加的压缩-弯曲负荷的能力。单侧小关节切除术导致力量平均下降 31.6+/-9.7%，而双侧小关节破坏导致力量平均下降 53.1+/-1 1%。运动分析 在小关节切除术后的二维平面中，表明瞬时旋转轴 (IAR) 发生前移，从而导致椎体和椎间盘上的负荷增加。 IAR 在水平面上的这种前移通过小关节的线固定得到了显着但并未完全解决。这些固定技术，包括小关节到小关节或小关节到海绵突过程接线，表现出类似的能力，可以恢复功能单元的强度，并减少由小关节切除术引起的垂直轴和前轴的过度运动。
Facetectomy, either unilateral or bilateral, significantly altered the capacity of cervical spine functional units to withstand increasing compression-flexion loads applied In a constant mode to different specimen configurations. Unilateral facetectomy resulted in an average 31.6+/-9.7 percent decrease in strength whereas bilateral disruption caused an average 53.1+/-1 1 percent decrease in strength. Motion analysis In a two-dimensional plane after facetectomy indicated an anterior displacement of the instantaneous axis of rotation (IAR) with a resultant increased load on the vertebral bodies and disc. This anterior shift of the IAR in the horizontal plane was significantly but not completely resolved by wire fixation of the facet joints. These fixation techniques, constisting of either facet to facet or facet to splnous process wiring, demonstrated a similar capability to restore strength to the functional units as well as reducing excessive motion In the vertical and anterior axes Induced by the facetectomies.