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[Comment] Total joint arthroplasty in younger patients: heading for trouble?

Total hip arthroplasty (THA) and total knee arthroplasty (TKA) are safe and effective surgical procedures for advanced degenerative osteoarthritis.1,2 Traditionally, the success of total hip and knee arthroplasty has been determined by the measurement of survival. In the Lancet, Lee Bayliss and colleagues3 now introduce the use of lifetime risk as a novel approach to illustrate the risk of revision surgery following joint replacement. Lifetime risk data, which describe the probability of an event occurring over the course of a lifetime, is useful to patients, clinicians, and other health-care professionals because it is easier to convey and understand than the commonly used survival rates.