普瑞米尔和泽菲尔颈椎前路钢板的负荷分担
Load sharing in Premier and Zephir anterior cervical plates.
作者信息
Rapoff Andrew J, Conrad Bryan P, Johnson Wesley M, Cordista Andrew, Rechtine Glenn R
机构信息
Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611-6250, USA.
出版信息
Spine (Phila Pa 1976). 2003 Dec 15;28(24):2648-50; discussion 2651. doi: 10.1097/01.BRS.0000099387.37393.3F.
STUDY DESIGN
An in vitro biomechanical study using a simulated anterior cervical discectomy and interbody fusion model to compare the load sharing properties of two semiconstrained cervical (Premier and Zephir) plates.
OBJECTIVES
To determine the percent load transmission through these plates and grafts under simple axial compression.
SUMMARY OF BACKGROUND DATA
No published data exist as to the load transmission through these semiconstrained plates.
METHODS
Cadaveric calf spines were subjected to axial compression loading while instrumented with an interbody graft and with the graft plus one of the plates. Load transmission was computed through an analysis of the load-displacement data.
RESULTS
A mean load transmission of 23% was shared by the Premier plate. The Zephir, a more constrained plate but still semiconstrained, shared a mean of 32% of the load.
CONCLUSIONS
The semiconstrained plates tested allow more graft loading than some previously tested constrained plates. However, there are differences between the research methods used in these studies that provide a less than satisfactory comparison.
研究设计
一项体外生物力学研究，使用模拟的颈椎前路椎间盘切除和椎间融合模型来比较两种半限制性颈椎板（Premier和Zephir）的负荷分担特性。
目的
确定在简单轴向压缩下通过这些钢板和移植物的负荷传递百分比。
背景资料总结
关于通过这些半限制性钢板的负荷传递，尚无已发表的数据。
方法
对尸体小牛脊柱施加轴向压缩负荷，同时植入椎间移植物以及移植物加其中一种钢板。通过分析负荷-位移数据计算负荷传递。
结果
Premier钢板分担的平均负荷传递为23%。Zephir钢板是一种限制程度更高但仍为半限制性的钢板，平均分担32%的负荷。
结论
所测试的半限制性钢板比一些先前测试的限制性钢板允许更多的移植物负荷。然而，这些研究中使用的研究方法存在差异，导致比较结果不尽人意。
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