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首页> 外文期刊>Journal of Biomechanics >Repeated application of incremental landing impact loads to intact knee joints induces anterior cruciate ligament failure and tibiofemoral cartilage deformation and damage: A preliminary cadaveric investigation.
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Repeated application of incremental landing impact loads to intact knee joints induces anterior cruciate ligament failure and tibiofemoral cartilage deformation and damage: A preliminary cadaveric investigation.

机译：在完整的膝关节上反复施加增量着陆冲击载荷会导致前十字韧带衰竭以及胫股软骨变形和损伤：尸体初步研究。

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摘要

Anterior cruciate ligament (ACL) injury is a major problem worldwide and prevails during high-impact activities. It is not well-understood how the extent and distribution of cartilage damage will arise from repetitive landing impact loads that can lead to ACL failure. This study seeks to investigate the sole effect of repetitive incremental landing impact loads on the induction of ACL failure, and extent and distribution of tibiofemoral cartilage damage in cadaveric knees. Five cadaveric knees were mounted onto a material testing system at 70 degrees flexion to simulate landing posture. A motion-capture system was used to track rotational and translational motions of the tibia and femur, respectively. Each specimen was compressed at a single 10Hz haversine to simulate landing impact. The compression trial was successively repeated with increasing actuator displacement till a significant compressive force drop was observed. All specimens underwent ACL failure, which was confirmed via magnetic resonance scans and dissection. Volume analysis, thickness measurement and histological techniques were employed to assess cartilage lesion status. For each specimen, the highest peak compressive force (1.9-7.8kN) was at the final trial in which ACL failure occurred; corresponding posterior femoral displacement (7.6-18.0mm) and internal tibial rotation (0.6 degrees -4.7 degrees ) were observed. Significant compressive force drop (79.8-90.9%) was noted upon ACL failure. Considerable cartilage deformation and damage were found in exterior, posterior and interior femoral regions with substantial volume reduction in lateral compartments. Repeated application of incremental landing impact loads can induce both ACL failure and cartilage damage, which may accelerate the risk of developing osteoarthritis.
机译：前交叉韧带（ACL）损伤是世界范围内的主要问题，在高影响力活动中普遍存在。反复的着陆冲击载荷会导致ACL失效，从而导致软骨损伤的程度和分布如何尚不为人所知。这项研究旨在调查重复的增量着陆冲击负荷对ACL失败的诱发以及尸体膝盖中胫股软骨损伤的程度和分布的唯一影响。将五个尸体膝盖以70度屈曲度安装到材料测试系统上，以模拟着陆姿势。使用运动捕捉系统分别跟踪胫骨和股骨的旋转和平移运动。每个标本在一个10Hz的hasversine上压缩以模拟着陆冲击。随着执行机构位移的增加，依次重复进行压缩试验，直到观察到明显的压缩力下降为止。所有标本均经历了ACL失败，这已通过磁共振扫描和解剖证实。使用体积分析，厚度测量和组织学技术评估软骨病变状态。对于每个标本，最大的峰值压缩力（1.9-7.8kN）是在发生ACL失败的最终试验中。观察到相应的股骨后移位（7.6-18.0mm）和胫骨内旋转（0.6度-4.7度）。在ACL失效后，压缩力显着下降（79.8-90.9％）。在外侧，后部和内部股骨区域发现了相当大的软骨变形和损伤，并且在外侧隔室中体积明显减小。反复施加递增的着陆冲击载荷会同时导致ACL失败和软骨损伤，从而加速发生骨关节炎的风险。

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