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Knee replacement surgery — also known as knee arthroplasty (ARTH-row-plas-tee) — can help relieve pain and restore function in severely diseased knee joints. During knee replacement, a surgeon cuts away damaged bone and cartilage from your thighbone, shinbone and kneecap and replaces it with an artificial joint made of metal alloys, high-grade plastics and polymers.
The first artificial knees were little more than crude hinges. Now, you and your doctor can choose from a variety of designs that take into account your age, weight, activity level and overall health. Most knee replacement joints attempt to act like your knee, with its ability to roll and glide as it bends.
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