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在子床准备过程中,端板的削弱会显著降低端板的负载能力

Anna-Katharina Calek¹, Frédéric Cornaz², Mauro Suter³

¹Department of Orthopedics, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland. anna-katharina.calek@balgrist.ch.

European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society

|May 11, 2024

概括

在后腰椎间体融合 (PLIF) 或跨腰椎间体融合 (TLIF) 植入之前,末端板的削弱显著降低了脊椎末端板的阻力. 这种削弱效应在PLIF子中更加明显,骨质直接影响故障负载.

科学领域:

脊柱外科手术脊柱外科手术
生物力学生物力学
整形外科的研究研究.

背景情况:

后腰椎间体融合 (PLIF) 和横腰椎间体融合 (TLIF) 是常见的脊柱融合程序.
端板的准备是子沉降和融合成功的关键步骤.
准备后脊椎末板的机械完整性尚未完全理解.

研究的目的:

在PLIF或TLIF子植入之前,评估端板减弱对抗失效的影响.
为了比较同一脊椎体内的削弱与完整的末端板的机械行为.
为了研究骨质量和端板抗性之间的关系.

主要方法:

22个人类的腰椎经历了拉坡到失败的测试.
每个脊椎的一个末端板被测试完好无损,另一个经过模拟削弱.
植入了PLIF或TLIF子,并施加轴向压缩,直到末板失效,通过CT (Hounsfield单位) 评估骨质量.

主要成果:

终端板的减弱使轴阻在TLIF中降低了15%,在PLIF中降低了36.6%.
较高的骨质量 (霍恩斯菲尔德单位) 与完整的和削弱的终端板的终端板故障增加的力线性相关.
在所有测试条件中,在骨质量和故障负载之间观察到强烈的正相关性.

结论:

在子准备过程中,终端板的削弱显著损害了脊椎终端板的完整性.
端板的承载能力大大降低,特别是随着PLIF子的放置.
骨质量是终端板故障阻力的关键决定因素,在体内融合的背景下.

关键词:

生物机械研究研究子子是一个子.背部融合是指背部的融合.终端板是指一个终端板.这就是PLIF PLIF.在此之前,我一直在研究Subsidence.一个TLIF就是一个TLIF.

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