Journal
MULTIBODY SYSTEM DYNAMICS
Volume 20, Issue 4, Pages 287-306Publisher
SPRINGER
DOI: 10.1007/s11044-008-9120-8
Keywords
bone; flexible multibody dynamics; tibia; locomotion; strain estimation; MRI
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Funding
- Academy of Finland [114925]
- Academy of Finland (AKA) [114925, 114925] Funding Source: Academy of Finland (AKA)
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Bone is known to adapt to the prevalent strain environment while the variation in strains, e.g., due to mechanical loading, modulates bone remodeling, and modeling. Dynamic strains rather than static strains provide the primary stimulus of bone functional adaptation. The finite element method can be generally used for estimating bone strains, but it may be limited to the static analysis of bone strains since the dynamic analysis requires expensive computation. Direct in vivo strain measurement, in turn, is an invasive procedure, limited to certain superficial bone sites, and requires surgical implementation of strain gauges and thus involves risks (e.g., infection). Therefore, to overcome difficulties associated with the finite element method and the in vivo strain measurements, the flexible multibody simulation approach has been recently introduced as a feasible method to estimate dynamic bone strains during physical activity. The purpose of the present study is to further strengthen the idea of using the flexible multibody approach for the analysis of dynamic bone strains. Besides discussing the background theory, magnetic resonance imaging is integrated into the flexible multibody approach framework so that the actual bone geometry could be better accounted for and the accuracy of prediction improved.
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