The effects of a valgus collapse knee position on in vivo ACL elongation.
The effects of a valgus collapse knee position on in vivo ACL elongation.
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DOI：
10.1007/s10439-012-0629-x
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发表时间：
2013-01
影响因子：
3.8
通讯作者：
DeFrate, Louis E.
中科院分区：
文献类型：
--
作者：
Utturkar, G. M.;Irribarra, L. A.;Taylor, K. A.;Spritzer, C. E.;Taylor, D. C.;Garrett, W. E.;DeFrate, Louis E.
关键词：
关于哪些运动会增加前交叉韧带损伤的风险，有相互矛盾的数据。更具体地说，外翻塌陷姿势在前交叉韧带损伤中的机械作用仍然存在争议。我们的目标是在一个模拟膝关节运动的模型中评估前交叉韧带的延长，认为前交叉韧带损伤时会发生这种运动。8名健康男性受试者在三种静态膝关节姿势：完全伸展、屈曲30°和模仿文献中所描述的外翻塌陷姿势时，使用MR和双平面透视成像来测量ACL及其功能束在体内的伸长率。在本研究中，外翻塌陷位置包括膝关节屈曲30°、髋关节内旋和胫骨外旋10°。前交叉韧带长度由完全伸展(30.2±2.6 mm)减少到屈曲30°(27.1±2.2 mm)。外翻塌陷时前交叉韧带长度进一步缩短(25.6±2.4 mm)。前交叉韧带的两个功能束在三个位置中的每个位置都遵循类似的长度减少的趋势。由于劳损会遵循前交叉韧带长度的模式，在男性中，伸展膝盖着地可能是前交叉韧带损伤的一个更相关的风险因素，而不是外翻塌陷姿势。未来的研究应该评估动态运动模式对体内ACL菌株的影响。
There are conflicting data regarding what motions increase ACL injury risk. More specifically, the mechanical role of valgus collapse positions during ACL injury remains controversial. Our objective was to evaluate ACL elongation in a model that mimics knee movements thought to occur during ACL injury. Eight healthy male subjects were imaged using MR and biplanar fluoroscopy to measure the in vivo elongation of the ACL and its functional bundles during three static knee positions: full extension, 30° of flexion, and a position intended to mimic a valgus collapse position described in the literature. For this study, the valgus collapse position consisted of 30° of knee flexion, internal rotation of the hip, and 10° of external tibial rotation. ACL length decreased significantly from full extension (30.2 ± 2.6 mm) to 30° of flexion (27.1 ± 2.2 mm). ACL length further decreased in the valgus collapse position (25.6 ± 2.4 mm). Both functional bundles of the ACL followed similar trends with regards to decreases in length in each of the three positions. Since strain would follow patterns of ACL length, landing on an extended knee may be a more relevant risk factor for ACL injuries than the valgus collapse position in males. Future studies should evaluate the effects of dynamic motion patterns on in vivo ACL strains.
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影响因子：
2.8
作者：
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通讯作者：
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