What the Knees Really Need

Some 300,000 arthritic Americans have arthroscopic knee surgery each year. It doesn't work

Of all the moving parts in the body, few take as much abuse as the knee. With the momentum of each step, your knee joint absorbs three times your body weight. Straighten up from a deep squat, and the pressure on the joint can reach nine times your weight. Throw in a few falls or sharp blows, and that knee of yours will eventually wear out--and, in due time, develop painful osteoarthritis. That's why last week's news about a popular form of surgery to relieve pain from arthritis of the knee was so devastating.

The operation is called arthroscopic knee surgery,...

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