Strain distribution in the anterior cruciate ligament in response to anterior drawer force to the knee
Strain distribution in the anterior cruciate ligament in response to anterior drawer force to the knee
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DOI：
10.1299/jbse.16-00582
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发表时间：
2017-02
影响因子：
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通讯作者：
S. Yamakawa;R. Debski;H. Fujie
中科院分区：
文献类型：
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作者：
S. Yamakawa;R. Debski;H. Fujie
在本研究中，使用图像相关方法来确定猪前十字韧带（ACL）中的位点依赖性应变。特别是，当八个膝盖承受使用 6-DOF 机器人系统施加的最大 50 N 前胫骨负载时，对股骨和胫骨附着区域的 ACL 应变进行了量化。内侧、中间和外侧层的前束、中央束和后束中的 ACL 应变被确定为所施加的前部负载的函数。另外，在无负载条件下使用光学显微镜观察ACL的表面。结果显示，ACL 内侧层的应变随着中质区域前部负荷的增加而逐渐增加，几乎呈线性增加。相比之下，ACL内侧层股骨和胫骨附着区域的应变在前载荷开始时迅速增加，此后逐渐增加，在前束和后束中发现应变-前载荷曲线的斜率存在显着差异。响应50 N前力的最大应变出现在内侧和中层的胫骨附着区域，而最大应变出现在外侧层的股骨附着区域。显微镜观察表明，股骨和胫骨附着区的卷曲结构比中部物质更清晰。 ACL 的这些微观结构特征可能归因于在附着区域观察到的较高且与负载相关的非线性应变。我们的研究表明，完全伸展时 ACL 中的应变在股骨和胫骨附着区域以非线性方式与部位和负载相关。
In the present study, an image correlation method was used to determine the site-dependent strain in the porcine anterior cruciate ligament (ACL). In particular, the strain of the ACL in the femoral and tibial attachment areas was quantified when the eight knees were subjected to a maximum of 50 N anterior tibial load that was applied using a 6-DOF robotic system. The ACL strains in the anterior, central, and posterior bundles of the medial, middle and lateral layers were determined as a function of the applied anterior load. In addition, the surface of the ACL was observed using a light microscope under no loading condition. Results revealed that the strain in the medial layer of the ACL increased gradually and almost linearly with the increase of anterior load in the midsubstance area. In contrast, the strain in the femoral and tibial attachment areas of the medial layer of the ACL increased rapidly at the beginning of anterior loading and gradually thereafter with significant differences in slope of strain-anterior load curve found in the anterior and posterior bundles. The largest strain in response to 50 N of anterior force was found in the tibial attachment area in medial and middle layers, while the maximum strain was found in the femoral attachment area in the lateral layer. Microscopic observation indicated that crimp structure was more clearly observed in the femoral and tibial attachment areas than in the mid-substance. These microstructural features of the ACL were may be attributable to the higher and load-dependent, nonlinear strain observed in the attachment areas. Our study suggested that the strain in the ACL at full extension is siteand load-dependent in a non-linear manner at the femoral and tibial attachment areas.