Simultaneous estimation of the path, magnitude and orientation of the femorotibial contact forces using bone geometry constraints: an exploratory numerical study for the stance phase of gait
- 220 Downloads
The present study introduced a new method to simultaneously optimize the path, magnitude and orientation of medial and lateral femorotibial contact forces using bone geometry constraints. The new method will be numerically compared to the known contact point method while estimating the muscle and contact forces for the stance phase of a single gait trial.
A single generic lower extremity model was modified to allow knee flexion with an instantaneous rotation center. The contact point method simulated medial and lateral contact forces with no limited magnitude and with predefined one-dimensional paths and orientations. The new contact zone method simulated contact forces with a limited magnitude and with two-dimensional paths and orientations constrained by the geometry of the bones. A high and low limit was used to study the effect of limiting the contact force magnitude on the predicted forces.
The paths of the contact forces for the contact zone method showed a difference up to 25.5 mm with respect to the contact point model. The contact zone method also allowed for more shear contact forces and for some modulation of the external frontal moment. Further limiting the contact force magnitude induced noticeable differences of muscle forces.
The contact zone method allows the path, magnitude and orientation of the femorotibial contact forces to be sensitive to knee bone geometries and to the amount of allowable joint contact force. Such a method is promising in characterizing the contact forces with modified gait, bone geometries and knee strength associated with pathological conditions such as osteoarthritic and ACL-deficiency.
KeywordsMusculoskeletal modelling Femorotibial joint Contact forces Bone geometry Gait
This work was founded by the Natural Sciences and Engineering Research Council of Canada (NSERC).
- 2.Gerus, P., Sartori, M., Besier, T.F., Fregly, B.J., Delp, S.L., Banks, S.A., Pandy, M.G., D’Lima, D.D., Lloyd, D.G.: Subject-specific knee joint geometry improves predictions of medial tibiofemoral contact forces. J. Biomech. 46(16), 2778–2786 (2013). doi: 10.1016/j.jbiomech.2013.09.005 CrossRefGoogle Scholar
- 4.Manal, K., Buchanan, T.S.: An electromyogram-driven musculoskeletal model of the knee to predict in vivo joint contact forces during normal and novel gait patterns. J. Biomech. Eng. 135(2) (2013). doi: 10.1115/1.4023457
- 14.Dendorfer, S., Tørholm, S.: Report on the development of a new lower extremity model. AnyBody Technology, Aalborg University, Aalborg, Denmark, pp. 45 (2008) Google Scholar
- 17.Buckland-Wright, J.C., Macfarlane, D.G., Lynch, J.A., Jasani, M.K., Bradshaw, C.R.: Joint space width measures cartilage thickness in osteoarthritis of the knee: high resolution plain film and double contrast macroradiographic investigation. Ann. Rheum. Dis. 54(4), 263–268 (1995) CrossRefGoogle Scholar
- 20.Rasmussen, J., Torholm, S., Damsgaard, M., De Zee, M.: The role of mechanics and optimization in ergonomics. In: 5th ASMO-UK/ISSMO Conference of Engineering Design Optimization. Stratford upon Avon, United Kingdom (2004) Google Scholar
- 23.Li, Q., Griffiths, J.G.: Least squares ellipsoid specific fitting. In: Proceedings of the Geometric Modeling and Processing, Beijing, China, April 13–15, 2004, pp. 335–340 (2004) Google Scholar
- 26.Hubley-Kozey, C.L., Hill, N.A., Rutherford, D.J., Dunbar, M.J., Stanish, W.D.: Co-activation differences in lower limb muscles between asymptomatic controls and those with varying degrees of knee osteoarthritis during walking. Clin. Biomech. 24(5), 407–414 (2009). doi: 10.1016/j.clinbiomech.2009.02.005 CrossRefGoogle Scholar
- 29.Lundberg, H.J., Knowlton, C., Wimmer, M.A.: Fine tuning total knee replacement contact force prediction algorithms using blinded model validation. J. Biomech. Eng. 135(2) (2013). doi: 10.1115/1.4023388
- 38.Asfour, S., Eltoukhy, M.: Development and validation of a three-dimensional biomechanical model of the lower extremity. In: Klika, V. (ed.) Theoretical Biomechanics, pp. 161–186. InTech, Austria (2011) Google Scholar