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The popularity of knee and hip replacement surgeries is growing quickly in the U.S., The Washington Post noted last month. Total knee replacement is the sole option for effectively treating some chronic knee problems, MedPageToday stated last week, and more people are opting for it because of population growth, the obesity epidemic and expanding health insurance eligibility. But it isn’t a trivial procedure: Surgeons remove the ends of two bones, swapping them for metal and ....