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Although hip and knee replacements can be life-changing, some patients eventually require revisions of their implants. In this study, U.K. researchers evaluated lifetime risk for revision surgery, based on patient age at the time of the initial procedure.
More than 63,000 hip replacements and 54,000 knee replacements performed between 1991 and 2011 in patients older than 50 (mean age, 69.6; ≈15% were 50–59) were identified. For hip replacements, 10-year implant survival was 96%, and 20-year implant survival was 85%; for knee replacements, survival rates were 96% and 90%, respectively. Lifetime risk for revision increased with decreasing age. In younger men, (age range, 50–54), lifetime risk for revision was 20% for hip replacement and 35% fo…