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A normal knee
Joint disease or trauma may result in stiffness, swelling and pain in
your knee. This causes difficulty with you doing the simplest things, such
as walking or getting out of a chair. A joint replacement may help you
resume your activities with greater ease.
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Sitting,
standing and walking depend on the bending and straightening of the leg at
the knee. This hinge-like movement of the joint depends on smooth
cartilage and strong muscles to move.