The tensile and stress relaxation responses of human patellar tendon varies with specimen cross-sectional area
The tensile and stress relaxation responses of human patellar tendon varies with specimen cross-sectional area
复制标题
DOI：
10.1016/s0021-9290(99)00089-5
复制
发表时间：
1999-09-01
影响因子：
2.4
通讯作者：
Haut, RC
中科院分区：
文献类型：
--
作者：
Atkinson, TS;Ewers, BJ;Haut, RC
为了深入了解肌腱中胶原束结构的力学响应，对顺序切片的人类髌骨肌腱标本（方案1）和小（类似于1mm(2)）和大（类似于20mm(2)）横截面积的标本（方案2）进行了一系列恒定应变速率和恒定位移应力松弛力学试验。这些数据描述了应力松弛和恒应变速率拉伸响应是横截面积和含水量的函数。实验数据表明，与同一肌腱相同位置的较大样本相比，肌腱的小部分表现出更高的拉伸模量，更慢的松弛速率和更低的松弛量。随着截面面积的减小，松弛响应的减小和拉伸模量的增加是非线性的。这些数据表明，可能存在肌束下以外的结构，如表筋膜和其他结缔组织成分，影响肌腱的拉伸和应力松弛反应。1999爱思唯尔科学有限公司版权所有。
In order to provide insight into the mechanical response of the collagen fascicle structures in tendon, a series of constant strain rate and constant displacement, stress relaxation mechanical tests were performed on sequentially sectioned human patellar tendon specimens (protocol 1) and specimens with both small ( similar to 1 mm(2)) and large ( similar to 20 mm(2)) cross-sectional areas (protocol 2). These data described the stress relaxation and constant strain rate tensile responses as a function of cross-sectional area and water content. The experimental data suggested that small portions of tendon exhibit a higher tensile modulus, a slower rate of relaxation and a lower amount of relaxation in comparison to larger specimens from the same location in the same tendon. The decrease in relaxation response and the increase in tensile modulus with decreasing cross-sectional area was nonlinear. These data suggest that there may be structures other than the subfascicle, such as the epitenon and other connective tissue components, which influence the tensile and stress relaxation responses in tendon. (C) 1999 Elsevier Science Ltd. All rights reserved.