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Mechanical Properties of Tendon in Compression

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  • Mechanical Properties of Tendon in Compression

    Hi all,

    I have been trying to find information about the mechanical
    properties of tendon in compression but thus far have been
    unsuccessful. There is a lot information on tension but
    nothing on compression. I have tried searching the normal
    databases and the list archives. Does anyone know of any
    literature that has defined the mechanical properties of
    tendon in compression?

    The reason I ask this question is that I am interested in
    trying to measure the forces/pressure caused by the fixation
    of hamstring grafts against the bone tunnel wall during ACL
    reconstruction. Interference screws are a widely used form
    of fixation device particularly in the tibia as the bone
    mineral density is reduced compared to the distal femur.
    Normally the tendon graft is sized and then a bone tunnel
    the same diameter as the graft is drilled then the tendon is
    inserted into the bone tunnel and then an interference screw
    the same size as the tunnel is inserted in to the tunnel.
    As I am sure you can imagine this is a pretty tight fit.
    Depending on the particular surgeons preference the screw
    can range from +1mm to -2mm compared to the graft size.
    However we have no idea of the forces/pressure that these
    fixation devices apply to the tendon and bone tunnel wall,
    how the force/pressure is affected by varying the diameter
    of the interference screw or how changing the
    forces/pressure affects the healing/ingrowth of the tendon
    and bone.

    Any information you could provide would be welcomed and
    appreciated. I will post a summary once all replies are

    Have a merry christmas and a happy and safe new year.

    Mark Watts BScAppHMS(Ex-Sc) Hons, MPhil, PhD Candidate

    Room 706 O Block
    Gardens Point Campus
    School of Engineering Systems
    Queensland University of Technology
    GPO Box 2434
    QLD 4001

    Phone: +61 7 3864 9043
    Fax: +61 7 3864 1037
    Mobile: +61 0411 665 198

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