STRAIN IN THE ANTEROMEDIAL BUNDLE OF THE ANTERIOR CRUCIATE LIGAMENT UNDER COMBINATION LOADING
STRAIN IN THE ANTEROMEDIAL BUNDLE OF THE ANTERIOR CRUCIATE LIGAMENT UNDER COMBINATION LOADING
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DOI：
10.1002/jor.1100100203
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发表时间：
1992-03-01
影响因子：
2.8
通讯作者：
PATTERSON, HA
中科院分区：
文献类型：
--
作者：
BERNS, GS;HULL, ML;PATTERSON, HA
为了确定最可能引起损伤的外部负荷组合，我们测量了13例人类膝关节标本中前交叉韧带（ACL）前内侧束（AMB）内的应变。在固定屈曲角度的情况下，使用允许5df的负载应用系统，在0度、15度、30度三个屈曲角度上施加纯前/后力、内/外侧力、内/外翻扭矩和内/外轴向扭矩。组合载荷在两个弯曲角度：0度和30度成对施加。采用液态汞应变计测量前交叉韧带应变。胫骨前力是前内侧束应变的主要决定因素。该应变在30度屈曲明显大于0度屈曲。内力对上肢的应变敏感性约为纯前力的一半。当联合应用时，前侧和内侧力的作用是加性的。纯轴向扭矩和纯内翻/外翻扭矩均未观察到在任何弯曲角度下AMB的显著应变。然而，外翻扭矩联合前向力导致的应变明显大于单纯前向力。内轴向扭矩联合前向力也比单纯前向力产生更大的应变。
Strain within the anteromedial bundle (AMB) of the anterior cruciate ligament (ACL) was measured in 13 human knee specimens in order to determine the combination of external loads most likely to cause injury. Using a load application system that allowed 5 df with the flexion angle being fixed, pure loads of anterior/posterior force, medial/lateral force, varus/valgus torque, and internal/external axial torque were applied at three flexion angles: 0-degrees, 15-degrees, 30-degrees. Combined loads were applied in pairs at two flexion angles: 0-degrees and 30-degrees. Liquid mercury strain gauges were used to measure strain in the ACL. Anterior tibial force was the primary determinant of strain in the anteromedial bundle. This strain was significantly larger at 30-degrees flexion than at 0-degrees. The strain sensitivity of the AMB to medial force was approximately one-half that to pure anterior force. The effect of anterior and medial forces was additive when applied in combination. Neither pure axial torque nor pure varus/valgus torque was observed to strain significantly the AMB at any of the flexion angles investigated. However, valgus torque in combination with anterior force resulted in a significantly larger strain than pure anterior force. Internal axial torque in combination with anterior force also resulted in a larger strain than pure anterior force.