View Full Version : A library of orthopaedic prosthetic components?

09-10-2000, 06:24 PM
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.

MARCO VICECONTI, PhD (viceconti@tecno.ior.it)
Laboratorio di Tecnologia Medica tel. 39-051-6366865
Istituti Ortopedici Rizzoli fax. 39-051-6366863
via di barbiano 1/10, 40136 - Bologna, Italy

Tiger! Tiger! Burning bright in the forest of the night,
what immortal hand or eye could frame thy fearful symmetry?
Opinions expressed here do not necessarly reflect those of my employer

To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l