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Updated: Mar 17, 2026
07:57
An Experimental and Finite Element Protocol to Investigate the Transport of Neutral and Charged Solutes across Articular Cartilage
Published on: April 23, 2017
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A multi-scale elasto-plastic model of articular cartilage.
Malek Adouni1, Yasin Y Dhaher2
1Northwestern University, Physical Medicine and Rehabilitation Department, 345 East Superior Street, Chicago, IL 60611, USA; Rehabilitation Institute of Chicago, Sensory Motor Performance Program, 345 East Superior Street, Chicago, IL 60611, USA.
Journal of Biomechanics
|July 21, 2016
Summary
This study introduces a multiscale model to link microscale collagen damage to macroscale cartilage function in osteoarthritis (OA). The model simulates damage progression based on collagen cross-link density, offering insights into OA
Area of Science:
- Biomedical Engineering
- Computational Biology
- Materials Science
Background:
- Collagen damage is an early indicator of cartilage degeneration and osteoarthritis (OA).
- The relationship between microscale collagen damage and macroscale cartilage function remains unclear.
- Understanding this link is crucial for developing effective OA treatments.
Purpose of the Study:
- To elucidate the biochemical and mechanical underpinnings of OA.
- To connect microscale defects in collagen fibrils to macroscopic cartilage mechanics using a multiscale model.
- To investigate damage initiation and propagation in cartilage as a function of cross-link density.
Main Methods:
- Development and application of a multiscale fibril reinforced hyperelastoplastic (MFRHEP) model.
- The model accounts for the structural architecture from tropocollagen molecules to the entire cartilage tissue.
- Model validation using experimental data from unconfined compression and indentation tests on cartilage.
Main Results:
- The MFRHEP model accurately described the transient response of articular cartilage under various loading conditions.
- The model successfully simulated collagen damage initiation and propagation.
- Cartilage damage was realistically simulated in relation to cross-link density at the microfibril level.
Conclusions:
- The multiscale model provides a realistic simulation of cartilage damage in osteoarthritis.
- This study is the first to express aggregate cartilage damage in terms of microfibril cross-link density.
- The findings offer a novel approach to understanding and potentially treating OA by targeting collagen structure.
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