In Figure 1-9, at which position does the weight produce the greatest distractive on the knee joint?
a. A
b. B
c. C
d. D
ANS: A
When the line of force is parallel with the moving segment, it will create either a distractive or
compressive force between the two boney segments. Distraction occurs when there is a pull or
movement of one bony segment away from another. Because the weight would be moving the tibia
away from the femur, it will create a distractive force.
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