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Abstract
In addition to its therapeutic benefits, continuous passive motion has recently found
a novel application in inducing vibration of the patella which is a function of the
surface characteristics of the patellofemoral articular cartilage. In order to simplify
the interpretation of this vibration, it is important to maintain the relative motion
of the two surfaces at a constant velocity. It has been found that, despite the highly
complex geometry and kinematics of the knee joint, this condition may be satisfied
by simply translating the heel from the buttocks at a constant linear velocity, due
to the linear functions relating both knee angle and patellar displacement to heel
translation.
Keywords
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© 1994 Published by Elsevier Inc.
