If your knee is damaged by arthritis or injury, in some cases your doctor will want it replaced with artificial assets. He begins by making an S-shaped cut on your knee and moving the muscles and ligaments out of the way. He then cuts off all the damaged stuff and then takes three metal pieces to replace the three bone parts cut off. Once they are in place X-rays are taken to make sure they are in place correctly and then the incision is sewn back up. A drain is left into remove excess fluid.
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