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  • boardwalk97 boardwalk97 Apr 2, 2013 10:42 AM Flag

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    Millions of americans suffers from osteoarthritis of the knee. Their cartilage has worn down, their knees are swollen and painful. Many patients with osteoarthritis of the knee can be managed with oral medications, injectable medications such as Synvisc or Orthovisc, physical therapy and activity modification. These methods work for many… for a while. Then you notice you fail to respond as well. Then the injection works for only a brief period of time. What next? Your surgeon might mention that you are a candidate for a knee replacement ust like age-defying baby boomers, older folks have seen a surge in knee replacement surgeries, driven partly by a desire to stay active and by joint-damaging obesity.

    The findings are in a study of more than 3 million Medicare patients, aged 65 and older, who got artificial knees from 1991 through 2010. Almost 10 percent of the operations were redos - replacing worn-out artificial joints.

    The number of initial knee-replacement surgeries each year on these older patients more than doubled during that time, rising to nearly 244,000 in 2010. Patients were in their mid-70s on average when they had surgery; that age edged up slightly during the study.

    The aging population and rising numbers of Medicare enrollees contributed to the increase. But the per capita rate also increased, from about 3 surgeries per 10,000 enrollees in 1991 to 5 per 10,000 in 2010.

    "There's a huge percentage of older adults who are living longer and want to be active," and knee replacement surgery is very effective, said lead author Dr. Peter Cram, an associate professor of internal medicine at the University of Iowa.

    The study appears in Wednesday's Journal of the American Medical Association.

    The pace of growth slowed in more recent years - possibly because increasing numbers of younger adults have also been getting artificial knees, which typically last 15 to 20 years. The troubled economy may also have slowed demand for an operation that costs ab

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