An extended discrete element method for the estimation of contact pressure at the ankle joint during stance phase
An extended discrete element method for the estimation of contact pressure at the ankle joint during stance phase
复制标题
站立相踝关节接触压力估计的扩展离散元法
DOI：
10.1177/0954411920905434
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Lingzhong Guo
中科院分区：
文献类型：
--
作者：
Ivan Benemerito;L. Modenese;E. Montefiori;C. Mazzà;M. Viceconti;D. Lacroix;Lingzhong Guo
踝关节接触压力异常与骨关节炎的发病有关。在体内测量是不可能的，目前可用的技术，所以计算方法，如有限元分析（FEA）经常被用来代替。离散元法（DEM）是一种计算效率高的替代费时的有限元分析方法，也被用于预测关节接触压力。它将关节软骨描述为一个独立的弹簧床，假设线性弹性行为和骨骼之间没有相对运动。在这项研究中，我们提出了扩展DEM (EDEM)，它能够跟踪距骨随时间的运动。该方法与受试者特定肌肉骨骼模型的输入数据一起用于预测步态期间踝关节的接触压力。EDEM的结果还与传统DEM的结果进行了比较。EDEM的接触面积预测值大于DEM（分别为4.67和4.18 cm2）。接触压力峰值为：EDEM为7.3 MPa， DEM为6.92 MPa。从EDEM预测的值落在文献报道的范围内。总的来说，距骨的运动对压力分布的延伸和形状的影响大于对压力大小的影响。结果表明，EDEM是预测日常活动中踝关节接触压力的有效方法。
Abnormalities in the ankle contact pressure are related to the onset of osteoarthritis. In vivo measurements are not possible with currently available techniques, so computational methods such as the finite element analysis (FEA) are often used instead. The discrete element method (DEM), a computationally efficient alternative to time-consuming FEA, has also been used to predict the joint contact pressure. It describes the articular cartilage as a bed of independent springs, assuming a linearly elastic behaviour and absence of relative motion between the bones. In this study, we present the extended DEM (EDEM) which is able to track the motion of talus over time. The method was used, with input data from a subject-specific musculoskeletal model, to predict the contact pressure in the ankle joint during gait. Results from EDEM were also compared with outputs from conventional DEM. Predicted values of contact area were larger in EDEM than they were in DEM (4.67 and 4.18 cm2, respectively). Peak values of contact pressure, attained at the toe-off, were 7.3 MPa for EDEM and 6.92 MPa for DEM. Values predicted from EDEM fell well within the ranges reported in the literature. Overall, the motion of the talus had more effect on the extension and shape of the pressure distribution than it had on the magnitude of the pressure. The results indicated that EDEM is a valid methodology for the prediction of ankle contact pressure during daily activities.
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DOI：
10.1115/1.2953472
发表时间：
2008-10
期刊：
Journal of biomechanical engineering
影响因子：
--
作者：
Anderson AE;Ellis BJ;Maas SA;Peters CL;Weiss JA
通讯作者：
Weiss JA
影响因子：
2.4
作者：
Genda, E;Iwasaki, N;Chao, EYS
通讯作者：
Chao, EYS
离散元分析是计算髋臼骨折前后髋关节接触应力的有效方法。
影响因子：
2.4
作者：
Townsend,KevinC;Thomas-Aitken,HollyD;Rudert,MJames;Kern,AndrewM;Willey,MichaelC;Anderson,DonaldD;Goetz,JessicaE
通讯作者：
Goetz,JessicaE
影响因子：
2.4
作者：
Siegler, S;Udupa, JK;Roach, N
通讯作者：
Roach, N
DOI：
--
发表时间：
2007
期刊：
Molecular & cellular biomechanics : MCB
影响因子：
--
作者：
Volokh,KY;Chao,EYS;Armand,M
通讯作者：
Armand,M