Stabile Kathryne J, Pfaeffle Jamie, Weiss Jeffrey A, Fischer Kenneth, Tomaino Matthew M
Department of Orthopaedic Surgery, Musculoskeletal Research Center, University of Pittsburgh, Pennsylvania, P.O. Box 71199, Pittsburgh, PA 151213, USA.
J Orthop Res. 2004 May;22(3):607-12. doi: 10.1016/j.orthres.2003.05.002.
Interest in reconstruction of the interosseous ligament (IOL) of the forearm in the setting of longitudinal radio-ulnar dissociation has increased in recent years with hopes of improving clinical outcomes. This increased interest has been accompanied by research on biomechanics of the IOL. However, little is known about stress and strain in the IOL under externally applied forearm loads. This information is needed to help guide reconstruction. Mechanical properties of the IOL are needed to properly model the IOL for analyses such as finite element models. The objective of this study was to document the bi-directional mechanical properties along the fiber direction (longitudinal) and perpendicular to the fiber direction (transverse). Twenty specimens were mounted in a materials testing machine to perform preconditioning and a load to failure tensile test in each direction. Strain markers on the surface of the specimens were tracked with a video system. Data analysis provided stress-strain curves for each specimen. The elastic moduli of longitudinal and transverse specimens were 515+/-277 and 1.82+/-2.93 MPa, respectively. The tensile strength and ultimate strain of longitudinal and transverse specimens were 54.1+/-25.2 and 0.18+/-0.20 and 16+/-5% and 34+/-32%, respectively. The bi-directional mechanical properties of the IOL compared well with those published for the medial collateral ligament of the knee. The mechanical properties in the longitudinal direction were much greater than those in the transverse direction, which is indicative of the IOL's role in resisting longitudinal loading. The results of this study can be used to generate mathematical models of stress and strain in the IOL.
近年来，随着人们希望改善临床结果，在前臂纵向桡尺关节分离的情况下，对重建前臂骨间韧带（IOL）的兴趣有所增加。这种兴趣的增加伴随着对IOL生物力学的研究。然而，对于在外加前臂负荷下IOL中的应力和应变知之甚少。需要这些信息来指导重建。为了进行诸如有限元模型等分析，需要IOL的力学性能来正确模拟IOL。本研究的目的是记录沿纤维方向（纵向）和垂直于纤维方向（横向）的双向力学性能。将20个标本安装在材料试验机中，在每个方向上进行预处理和破坏拉伸试验。用视频系统跟踪标本表面的应变标记。数据分析提供了每个标本的应力-应变曲线。纵向和横向标本的弹性模量分别为515±277和1.82±2.93MPa。纵向和横向标本的拉伸强度和极限应变分别为54.1±25.2和0.18±0.20以及16±5%和34±32%。IOL的双向力学性能与已发表的膝关节内侧副韧带的力学性能相比良好。纵向的力学性能远大于横向的力学性能，这表明IOL在抵抗纵向负荷中的作用。本研究结果可用于生成IOL中应力和应变的数学模型。
