The study’s findings seemed to support his concerns: The number of revision surgeries increased 133% during the study period, particularly among younger patients. “We had some theoretical concerns about how young is too young,” says lead study author Jacob Drew, MD, of the Medical University of South Carolina in Charleston. The younger you are when you have the surgery and the longer you live, the more likely it is you will need revision surgery. Studies have found that 85% of knees last 20 years, and the AAOS estimates 10% of patients will need a revision at some point. Revisions are long and complex, require special surgical skills and are rarely as successful as the first operation at restoring function and range of motion. But many entail removing and replacing the entire implant device, the ends of which are affixed to the thigh and shin bones. Some revision surgeries are relatively minor - for instance, when one component of the implant is exchanged for another.
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