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The Journal of Bone and Joint Surgery, Vol 64, Issue 2 258-264, Copyright © 1982 by Journal of Bone and Joint Surgery, Inc
An in vitro biomechanical evaluation of anterior-posterior motion of the knee. Tibial displacement, rotation, and torque
T Fukubayashi, PA Torzilli, MF Sherman and RF Warren
We tested the anterior-posterior motion of nine normal cadaver knees in
zero to 90 degrees of flexion using a specially designed apparatus. This
apparatus applied a dynamic anterior-posterior force to each knee and
measured the resulting tibial displacement, rotation, and torque. In the
intact knee, an anterior force produced an internal tibial torque and
internal tibial rotation, while a posterior force produced an external
torque and external rotation. Anterior-posterior displacement increased by
30 per cent when the tibia was allowed to rotate freely about its neutral
rotation position. Isolated section of the anterior cruciate ligament
produced more than double the amount of anterior displacement without
affecting posterior displacement. Isolated section of the posterior
cruciate ligament produced almost triple the amount of posterior
displacement without affecting anterior displacement. After cutting either
the anterior or the posterior cruciate ligament, the resulting internal or
external secondary tibial rotation disappeared. It appears, therefore, that
the anterior and posterior cruciate ligaments are the primary restraints to
motion in the anterior and posterior directions as well as the causes of
internal and external tibial rotation during anterior and posterior motion.

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T.D. Rosenberg and G.L. Rasmussen
The function of the anterior cruciate ligament during anterior drawer and Lachman's testing: An in vivo analysis in normal knees
Am. J. Sports Med.,
July 1, 1984;
12(4):
318 - 322.
[Abstract]
[PDF]
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