The surgery that replaces the knee joint rose by 66% in American age 65-84 from 1997 to 2007. And in Americans age 45-64, the rate tripled in that time. The technology has improved and more surgeons are willing to perform this operation in younger people and the public has a greater familiarity with the procedure and its results.
We don't know if more patients age 45-64 are getting
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