Tibio-femoral joint constraints for bone pose estimation during movement using multi-body optimization

被引:29
作者
Bergamini, E. [1 ,2 ]
Pillet, H. [2 ]
Hausselle, J. [2 ]
Thoreux, P. [2 ,3 ]
Guerard, S. [2 ]
Camomilla, V. [1 ]
Cappozzo, A. [1 ]
Skalli, W. [2 ]
机构
[1] Univ Rome Foro Italico, Locomotor Apparat Bioengn Lab, Dept Human Movement & Sport Sci, I-00135 Rome, Italy
[2] Arts & Metiers ParisTech, Lab Biomecan, F-75013 Paris, France
[3] Univ Paris 13, Hop Avicenne, Serv Chirurg Orthoped & Traumatol, F-93009 Bobigny, France
关键词
Knee ligament length; Joint constraints; Soft tissue artefact; Global optimization; Biomechanics; ANTERIOR CRUCIATE LIGAMENT; IN-VIVO ELONGATION; COLLATERAL LIGAMENTS; GLOBAL OPTIMIZATION; KNEE FLEXION; MARKERS; SYSTEMS; MOTION;
D O I
10.1016/j.gaitpost.2011.03.006
中图分类号
Q189 [神经科学];
学科分类号
071006 [神经生物学];
摘要
When using skin markers and stereophotogrammetry for movement analysis, bone pose estimation may be performed using multi-body optimization with the intent of reducing the effect of soft tissue artefacts. When the joint of interest is the knee, improvement of this approach requires defining subject-specific relevant kinematic constraints. The aim of this work was to provide these constraints in the form of plausible values for the distances between origin and insertion of the main ligaments (ligament lengths), during loaded healthy knee flexion, taking into account the indeterminacies associated with landmark identification during anatomical calibration. Ligament attachment sites were identified through virtual palpation on digital bone templates. Attachments sites were estimated for six knee specimens by matching the femur and tibia templates to low-dose stereoradiography images. Movement data were obtained using stereophotogrammetry and pin markers. Relevant ligament lengths for the anterior and posterior cruciate, lateral collateral, and deep and superficial bundles of the medial collateral ligaments (ACL, PCL, LCL, MCLdeep, MCLsup) were calculated. The effect of landmark identification variability was evaluated performing a Monte Carlo simulation on the coordinates of the origin-insertion centroids. The ACL and LCL lengths were found to decrease, and the MCLdeep length to increase significantly during flexion, while variations in PCL and MCLsup length was concealed by the experimental indeterminacy. An analytical model is given that provides subject-specific plausible ligament length variations as functions of the knee flexion angle and that can be incorporated in a multi-body optimization procedure. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:706 / 711
页数:6
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