Effects of knee flexion on the structural properties of the rabbit femur-anterior cruciate ligament-tibia complex (FATC).
Effects of knee flexion on the structural properties of the rabbit femur-anterior cruciate ligament-tibia complex (FATC).
复制标题
膝关节屈曲对兔股骨-前交叉韧带-胫骨复合体（FATC）结构特性的影响。
DOI：
10.1016/0021-9290(87)90277-6
复制
发表时间：
1987
影响因子：
2.4
通讯作者：
Akeson,WH
中科院分区：
文献类型：
--
作者：
Woo,SL;Hollis,JM;Roux,RD;Gomez,MA;Inoue,M;Kleiner,JB;Akeson,WH
许多研究都是为了确定前交叉韧带（ACL）的生物力学特性。股骨- acl -胫骨复合体（FATC）试样的夹持方法、施加的应变速率、膝关节屈曲角度和施加载荷的方向对结果有重要影响。我们认为韧带的拉伸性能和强度应该通过沿韧带轴线施加拉伸力来测量。设计了一种多功能夹具来实现这一目的。57个兔膝关节标本在0°、30°和90°的屈曲角度下进行了测试。此外，对25对兔腿进行了比较研究，其中沿韧带或沿胫骨轴加载。测定了循环迟滞、极限载荷、能量吸收和刚度。沿胫骨轴加载的FATC的极限载荷值随着膝关节屈曲的增加而降低，而沿韧带轴加载的FATC没有发现这种变化。测量的其他结构特性也遵循类似的趋势。综上所述，沿韧带轴方向加载时，兔FATC的结构特性随膝关节屈曲（从0°到90°）变化最小，但沿胫骨轴方向加载时，其结构特性显著降低。因此，只有在加载方向相对于ACL相似的情况下，本研究领域获得的数据才能进行比较。
Many studies have been conducted to determine the biomechanical properties of the anterior cruciate ligament (ACL). The method of holding the femur-ACL-tibia complex (FATC) test specimen, the strain rate applied, the angle of knee flexion and the direction of the applied loads have an important effect on the outcome. It is felt that the tensile properties and strength of the ligament should be measured by applying the tensile force along the axis of the ligament. A versatile clamp was designed to accomplish this purpose. Fifty-seven rabbit knee specimens were tested at angles of flexion of 0°, 30° or 90°. In addition, a comparative study of 25 pairs of rabbit legs were performed, whereby loading was either along the ligament or along the tibial axis. Cyclic hysteresis, ultimate load, energy absorbed, and stiffness were determined.The ultimate load values for the FATC decreased with increased knee flexion for those loaded along the tibial axis, while no such change was detected for FATC tested along the ligament axis. Other structural properties measured followed similar trends. It is concluded that the structural properties of the rabbit FATC change minimally with knee flexion (from 0 to 90°) when loaded along the ligament axis, but decrease significantly with knee flexion when loaded along the axis of the tibia. Therefore, the data obtained in this field of study can be compared only if the direction of loading with respect to the ACL is similar.