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Viscoelasticity of type II collagen in articular cartilage

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  • Viscoelasticity of type II collagen in articular cartilage

    Dear Colleagues,

    While some researchers believe that articular cartilage exhibits significant intrinsic viscoelastic behavior, others have not fully convinced by the relevant observations or modeling. As I understand from literature available to me at this time, I assume

    (1) that the intrinsic viscoelasticity (simply referred as viscoelasticity hereafter) of the proteoglycan matrix (excluding water) is negligible;
    (2) that the viscoelasticity of cartilage skeleton is mainly contributed by the collagen fibrillar matrix; and
    (3) that the fibrillar viscoelasticity is more significant when the fibrillar strain is larger.

    However, my literature search may be incomplete. For example, I might have missed some very important earlier publications which are not available from electronic database. Therefore I would appreciate
    i) all comments on any of my three assumptions, fors and cons. Please kindly provide me with reference citations whenever possible.
    ii) any observations on mechanical tests of type II collagen fibrils, or other types collagen fibrils if you think they are comparable in qualitative behavior. All information and publications (old or new, formal publications or informal presentations, reports) are welcome.

    Thank you very much for your attention and your input.

    Kind regards,

    Sincerely yours,
    LePing LI
    Faculty of Kinesiology
    University of Calgary
    2500 University Drive, N.W.
    Calgary, Alberta
    Canada T2N 1N4

    Tel. (403) 220 3449
    Fax. (403) 284 3553

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