Pullout strength of suture anchors: Effect of mechanical properties of trabecular bone
Pullout strength of suture anchors: Effect of mechanical properties of trabecular bone
复制标题
DOI：
10.1016/j.jbiomech.2009.12.007
复制
发表时间：
2010-04-19
影响因子：
2.4
通讯作者：
Gall, Ken
中科院分区：
文献类型：
--
作者：
Poukalova, Mariya;Yakacki, Christopher M.;Gall, Ken
本研究探讨了骨小梁微观结构与弹性模量、抗压强度和缝合锚拉强度之间的关系。12个新鲜冷冻肱骨进行力学测试，然后进行微计算机断层扫描（mu CT）。在合成锯骨或肱骨的特定位置（如大结节、小结节和肱骨头）进行圆柱形骨样本的压缩试验或使用Arthrex 5mm开瓶器进行拔出试验。合成锯骨进行了相同的力学测试和mu CT分析。将骨体积分数（BVF）、结构模型指数（SMI）、骨小梁厚度（TbTh）、骨小梁间距（TbSp）、骨小梁数（TbN）和连通性密度与两种材料的模量、抗压强度和拉拔强度进行比较。在尸体骨中，模量与所有微观结构特性相关，而抗压和抗拉强度仅与BVF、SMI和TbSp相关。合成骨的微观结构与尸体骨不同，SMI和TbTh在密度测试中几乎没有变化。因此，SMI和TbTh是仅有的与合成骨的力学性能测试没有相关性的微观结构特性。该研究有助于确定尸体骨和合成骨的关键微观结构-性能关系，并说明尸体骨和合成骨作为生物力学测试材料之间的异同。(C) 2010 Elsevier Ltd.版权所有。
This study investigated the relationships between trabecular microstructure and elastic modulus, compressive strength, and suture anchor pullout strength. Twelve fresh-frozen humeri underwent mechanical testing followed by micro-computed tomography (mu CT). Either compression testing of cylindrical bone samples or pullout testing using an Arthrex 5 mm Corkscrew was performed in synthetic sawbone or at specific locations in the humerus such as the greater tuberosity, lesser tuberosity, and humeral head. Synthetic sawbone underwent identical mechanical testing and mu CT analysis. Bone volume fraction (BVF), structural model index (SMI), trabecular thickness (TbTh), trabecular spacing (TbSp), trabecular number (TbN), and connectivity density were compared against modulus, compressive strength, and pullout strength in both materials. In cadaveric bone, modulus showed correlations to all of the microstructural properties, while compressive and pullout strength were only correlated to BVF, SMI, and TbSp. The microstructure of synthetic bone differed from cadaveric bone as SMI and TbTh showed little variation across the densities tested. Therefore, SMI and TbTh were the only microstructural properties that did not show correlations to the mechanical properties tested in synthetic bone. This study helps identify key microstructure-property relationships in cadaveric and synthetic bone as well as illustrate the similarities and differences between cadaveric and synthetic bone as biomechanical test materials. (C) 2010 Elsevier Ltd. All rights reserved.