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salmouahed34
11-05-2008, 03:52 AM
Dear all,



I am a Ph.D. student working on instrumented knee prosthesis.

I would like to ask a question related to the International Standard (ISO
14243-1, 2002)[1]: "The compressive load applied to the knee prosthesis is
offset 5mm medially from the tibial axis, as recommended in the ISO 14243
(2002) standard [1]". This offset corresponds to 0.07W+/-0.01W where: W is
the total width of the tibial component. In the study: W = 74 mm, then the
offset equals 5 mm.

I would like just to know, if possible, what is the reason of this offset
(0.07W) and how they defined this value of 0.07W?
Is there any study about the determination of this offset?


[1] ISO 14243-1, 2002. Implants for surgery-wear of total knee joint
prostheses. Part 1: Loading and displacement parameters for wear testing
machines with load control and corresponding environmental conditions for
test.



I would be so grateful for any information you could share with me.



Brest regards,
Shaban ALMOUAHED


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Shaban ALMOUAHED - Ph.D. Student
Department of Image and Information processing
TELECOM Bretagne / LATIM - INSERM U650