In this study, a model of femur which resembles bone natural structure has been developed. The model initially consists of a solid shell representing cortical bone encompassing a cubical network of interconnected rods with circular cross-sections representing trabecular bone part. A computational efficient program has been developed which iteratively changes the structure of trabecular bone by keeping the local stress in the structure within a defined stress range. The stress is controlled by either enhancing existing beam elements or removing beams from the initial trabecular frame structure. Trabecular bone structure is obtained for two load cases: walking and stair climbing. The results show that as the magnitude of the loads increase, the internal structure gets denser in critical zones. The higher density is achieved using loading associated with the stair climbing. Walking which is considered as the routine daily activity, results in the less internal density in different regions of the bone. The results show that the converged bone architecture consisting of rods and plates are consistent with the natural bone morphology of femur. Furthermore, the bone volume fraction at the critical regions of the converged structure is in a good agreement with previously measured data obtained from combinations of Dual X-ray Absorptiometry (DXA) and Computed Tomography (CT).
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ASME 2014 International Mechanical Engineering Congress and Exposition
November 14–20, 2014
Montreal, Quebec, Canada
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4646-9
PROCEEDINGS PAPER
Adaptive Bone Remodeling to Capture the Trabecular Bone Morphology of the Proximal Femur
S. Mohammad Ali Banijamali,
S. Mohammad Ali Banijamali
Northeastern University, Boston, MA
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Ramin Oftadeh,
Ramin Oftadeh
Northeastern University, Boston, MA
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Ashkan Vaziri,
Ashkan Vaziri
Northeastern University, Boston, MA
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Hamid Nayeb-Hashemi
Hamid Nayeb-Hashemi
Northeastern University, Boston, MA
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S. Mohammad Ali Banijamali
Northeastern University, Boston, MA
Ramin Oftadeh
Northeastern University, Boston, MA
Ashkan Vaziri
Northeastern University, Boston, MA
Hamid Nayeb-Hashemi
Northeastern University, Boston, MA
Paper No:
IMECE2014-40089, V003T03A048; 7 pages
Published Online:
March 13, 2015
Citation
Banijamali, SMA, Oftadeh, R, Vaziri, A, & Nayeb-Hashemi, H. "Adaptive Bone Remodeling to Capture the Trabecular Bone Morphology of the Proximal Femur." Proceedings of the ASME 2014 International Mechanical Engineering Congress and Exposition. Volume 3: Biomedical and Biotechnology Engineering. Montreal, Quebec, Canada. November 14–20, 2014. V003T03A048. ASME. https://doi.org/10.1115/IMECE2014-40089
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