Anterior cervical graft and plate load sharing.
Anterior cervical graft and plate load sharing.
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前路颈椎移植物和钢板负载分担。
DOI：
10.1097/00002517-199902000-00007
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
T. Zdeblick
中科院分区：
文献类型：
--
作者：
A. Rapoff;Thomas J. O'brien;A. Ghanayem;Dennis M. Heisey;T. Zdeblick
颈椎前路髓核摘除、植骨融合、前路钢板植骨是颈椎外科常见的手术方式。然而，移植物可以免受钢板的某些机械载荷的影响。在6具身体小牛脊柱上进行了力学测试，模拟颈椎前路摘除椎体间植骨并仅与前路钢板植骨融合，以确定植骨与钢板之间的载荷分担程度。载荷-位移数据被用来计算作为施加的轴向压缩载荷的连续函数的移植物和钢板之间的载荷分担量。尽管随着轴向载荷的增加(45~90N)，通过移植物传递的载荷百分比减少(53~41%)，但通过移植物传递的载荷的大小增加(24~37N)，相应的椎间应变为6%。在单节段手术中，颈椎前路钢板作为负荷分担装置，而不是负荷屏蔽装置，使植骨得以巩固，正如临床研究中所观察到的那样。
Anterior discectomy and fusion with an interbody bone graft and anterior plate is a common procedure in cervical spine surgical management. However, the graft may be shielded from some mechanical loading by the plate. Mechanical testing was performed on six cadaveric calf spines that were subjected to a simulated anterior cervical discectomy and fusion with an interbody bone graft alone and with an anterior plate to determine the amount of load sharing between the graft and plate. The load-displacement data were used to compute the amount of load sharing between the graft and the plate as a continuous function of the applied axial compression load. Although the percent load transmitted through the graft decreased (53 to 41%) as the axial load increased (45 to 90 N), the magnitude of load transmitted through the graft increased (24 to 37 N), with corresponding intervertebral strains <6%. In a single-level procedure, an anterior cervical plate serves as a load-sharing device rather than a load-shielding device, enabling graft consolidation as observed in clinical studies.