During hip surgery, patients often ask how long the replacement will last. A 2019 study published in The Lancet combined registry data to answer this question for total hip replacement patients with osteoarthritis. She analyzed the survival of prostheses in patients who had already undergone surgery or were deciding on it. A major limitation of the study is that many patients had older prostheses, which may not last as long as modern implants. The commentary highlights the reassuring survival results of modern hip replacements.