Knee adduction moment and medial contact force--facts about their correlation during gait.
Knee adduction moment and medial contact force--facts about their correlation during gait.
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DOI：
10.1371/journal.pone.0081036
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Bergmann G
中科院分区：
文献类型：
--
作者：
Kutzner I;Trepczynski A;Heller MO;Bergmann G
膝关节外收力矩被认为是内侧胫股接触力的替代指标，通常用于量化骨科干预的载荷降低效果。然而，关于内收力矩和内侧力之间的相关性，只有有限的和有争议的数据存在。本研究的目的是检查内收力矩是否确实是一个强有力的预测，通过确定它们在步态过程中的相关性的内侧力。使用带有遥测数据传输的膝关节植入物测量9名受试者的胫股接触力。步态分析同时进行联合负荷测量。在逆动力学方法中，使用skeleton运动学以及地面反作用力和惯性参数作为输入来计算膝关节外收力矩。采用线性回归分析方法，对整个站立期内收力矩与内侧力之间的相关性进行分析，并分别对站立早期和晚期内收力矩与内侧力之间的相关性进行分析。而只有中度之间的相关性内收力矩和内侧力，观察到在整个站姿阶段（R2 = 0.56），并在后期站姿阶段（R2 = 0.51），一个高度的相关性，观察到在早期站姿阶段（R2 = 0.76）。 此外，内收力矩高度相关的内侧力比在整个站立阶段（R2 = 0.75）。 这些结果表明，内收力矩是一个替代措施，非常适合于预测在整个站立阶段或在早期站立阶段的内侧力的内侧力比。然而，特别是在后期的立场阶段，中度相关性和高个体间的变化表明，内收时刻的预测价值是有限的。进一步的分析是必要的，以检查其他运动学，动力学或神经肌肉因素的组合是否可能导致更可靠的预测力的大小。
The external knee adduction moment is considered a surrogate measure for the medial tibiofemoral contact force and is commonly used to quantify the load reducing effect of orthopedic interventions. However, only limited and controversial data exist about the correlation between adduction moment and medial force. The objective of this study was to examine whether the adduction moment is indeed a strong predictor for the medial force by determining their correlation during gait. Instrumented knee implants with telemetric data transmission were used to measure tibiofemoral contact forces in nine subjects. Gait analyses were performed simultaneously to the joint load measurements. Skeletal kinematics, as well as the ground reaction forces and inertial parameters, were used as inputs in an inverse dynamics approach to calculate the external knee adduction moment. Linear regression analysis was used to analyze the correlation between adduction moment and medial force for the whole stance phase and separately for the early and late stance phase. Whereas only moderate correlations between adduction moment and medial force were observed throughout the whole stance phase (R2 = 0.56) and during the late stance phase (R2 = 0.51), a high correlation was observed at the early stance phase (R2 = 0.76). Furthermore, the adduction moment was highly correlated to the medial force ratio throughout the whole stance phase (R2 = 0.75). These results suggest that the adduction moment is a surrogate measure, well-suited to predicting the medial force ratio throughout the whole stance phase or medial force during the early stance phase. However, particularly during the late stance phase, moderate correlations and high inter-individual variations revealed that the predictive value of the adduction moment is limited. Further analyses are necessary to examine whether a combination of other kinematic, kinetic or neuromuscular factors may lead to a more reliable prediction of the force magnitude.
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影响因子：
3.8
作者：
Heijink, Andras;Gomoll, Andreas H.;Madry, Henning;Drobnic, Matej;Filardo, Giuseppe;Espregueira-Mendes, Joao;Van Dijk, C. Niek
通讯作者：
Van Dijk, C. Niek
DOI：
10.1080/10255842.2011.560841
发表时间：
2012-01-01
影响因子：
1.6
作者：
Bender, A.;Bergmann, G.
通讯作者：
Bergmann, G.
影响因子：
--
作者：
M端ndermann, A;Dyrby, CO;Andriacchi, TP
通讯作者：
Andriacchi, TP
影响因子：
2.4
作者：
Kaufman, KR;Hughes, C;An, KN
通讯作者：
An, KN
影响因子：
5.3
作者：
Halder, Andreas;Kutzner, Ines;Bergmann, Georg
通讯作者：
Bergmann, Georg