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首页> 外文期刊>Journal of orthopaedic research >Decreased posterior cruciate and altered collateral ligament loading following ACL transection: A longitudinal study in the ovine model
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Decreased posterior cruciate and altered collateral ligament loading following ACL transection: A longitudinal study in the ovine model

机译：ACL横断后后交叉韧带减少和副韧带负荷改变：绵羊模型的纵向研究

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Although ACL deficiency is shown to lead to joint degeneration, few quantitative data are reported on its effect on soft tissue structures surrounding the knee joint, specifically, the posterior cruciate and collateral ligaments. The kinematics of the stifle joint of sheep (N = 5) were measured during "normal" gait, as well as 4 and 20 weeks after ACL transection. These motions were reproduced using a unique robotic manipulator and the loads borne by PCL, MCL, and LCL during gait were determined. Our results demonstrated a significant decrease in mean PCL loads 20 weeks post-ACL injury, at hoof-strike (0% of gait, p = 0.034), hoof-off (66% of gait, p = 0.006), peak-swing (85% of gait, p = 0.026), and extension-before-hoof-strike (95% of gait, p = 0.028). Mean MCL loads did not significantly increase following ACL transection, maybe due to large between-animal variation. Finally, mean LCL loads indicated a significant decrease (p < 0.047) at 20 weeks across the entire gait cycle. From a clinical perspective, the load redistributions observed in cruciate and collateral ligaments following ACL injury indicate that these tissues can carry/adapt to the altered mechanical environment of the joint. The considerable variability in the magnitudes of change following ACL injury among animals also simulates clinical variability in humans after trauma.
机译：尽管显示ACL缺乏会导致关节退行性变，但很少有定量数据报道其对膝关节周围的软组织结构的影响，特别是后交叉韧带和侧副韧带。在“正常”步态期间以及ACL横断后4周和20周，测量绵羊的窒息关节的运动学（N = 5）。这些运动是使用独特的机械手进行再现的，并确定了步态中PCL，MCL和LCL所承受的负荷。我们的研究结果表明，ACL损伤后20周平均PCL负荷显着降低，在蹄击（0％步态，p = 0.034），蹄脱（66％步态，p = 0.006），高峰摆动（ 85％的步态，p = 0.026）和前腿伸展运动（95％的步态，p = 0.028）。 ACL横切后平均MCL负荷没有显着增加，这可能是由于动物之间的较大差异所致。最后，在整个步态周期中，平均LCL负荷显示20周时显着降低（p <0.047）。从临床角度来看，ACL损伤后在十字韧带和侧副韧带中观察到的负荷重新分布表明，这些组织可以携带/适应关节机械环境的改变。动物中ACL损伤后变化幅度的显着变化也模拟了创伤后人类的临床变化。

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