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A library of orthopaedic prosthetic components?

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  • A library of orthopaedic prosthetic components?

    Messages like to one here below are common on BIOMCH-L. As responsible for
    the Standardised Femur Program I also frequently receive requests for
    computer models of joint prostheses for research purposes.

    Unfortunately, the prosthetic CAD models we use are commonly obtained
    directly from the manufacturers with a non-disclosure clause. Thus we are
    not allowed to re-distribute them. While this situation is understandable
    for the prosthetic designs currently on the market, but I believe we could
    do much better for those designs that are not used anymore, but for which a
    large clinical history is available.

    It would be great if the CAD 3D model of components such as the Howmedica
    PCA or the original Charnley low-friction hip prostheses were made
    available to the research community. The same applies to designs
    considered unsuccessful such as the 3M Capital hip prosthesis.

    The problem is that I have no idea of how to get them. Why should the
    companies expose their historical designs? Which advantage would they
    obtain? I know there are some colleagues working in orthopaedic companies
    on the BIOMCH-L list. Could they please express their point of view on the

    In theory we could also consider to recover a sample and then try some
    reverse engineering. However, we would be never sure it the right design
    and it is a lot of work anyway. Last, I am not sure you can put on the
    public domain such reversed model without infringing any law.

    I would really appreciate any feedback on this matter, which in my opinion
    could boost the effectiveness of biomechanical studies on the clinical



    >From: "Andrew W. (Drew) Smith, PhD"
    >Subject: A 3-D model of the femoral component
    >Dear friends!
    >Does anyone arrange me to get where I can find a 3-D model of the femoral
    >component of TKR (total knee replacement) prosthesis in .DXF, .OBJ, 3DS,
    >.T3D, .3MF, or .B3D format?
    >I need these files for FE analysis of stress shielding and remodelling of
    >trabecular bone around the femoral component. We are trying to approach
    >differently for this phenomena using "Voxel meshing program".
    >Any help would be greatly appreciated.
    >Ye-Yeon, Won., M.D., Ph.D.

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    Istituti Ortopedici Rizzoli fax. 39-051-6366863
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