期刊
JOURNAL OF BIOMECHANICS
卷 41, 期 12, 页码 2633-2638出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jbiomech.2008.06.027
关键词
knee; finite elements; dynamic radiography
资金
- NIH [AR43860]
Little is known about in vivo menisci loads and displacements in the knee during strenuous activities. A new method that combines high-speed kinematics measured with biplane dynamic Roentgen stereogram metric analysis (DRSA) and a subject-specific finite element (FE) model for studying in vivo meniscal behavior is presented here. Further model calibration in a very controlled uniaxial low and high-rate compression loading condition is presented by comparing the model behavior against the measured high-accuracy menisci DRSA kinematics and direct tibio-femoral pressure measurement from a K-scan sensor. It is apparent that certain model aspects such as removing of the pressure sensor from the model can result in relatively large errors (14%) in contact parameters that are not reflected in the change of the measured meniscal kinematics. Changing mesh size to 1 mm by I mm elements increased the magnitude of all but one of the contact variables by up to 45%. This local validation using accurate localized patient-specific geometry and meniscal kinematics was needed to enhance model fidelity at the level of contact between menisci and cartilage. (c) 2008 Elsevier Ltd. All rights reserved.
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