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The Swedish Knee Arthroplasty Project

25 years ago, members of the Swedish Orthopedic Society, at a meeting in Uppsala, initiated a nationwide multicenter study which should monitor endoprosthetic knee surgery prospectively. The project evolved into the creation of a database, later known as the Swedish Knee Arthroplasty Register (SKAR), the oldest national arthroplasty register. It was a success and comprised more than 65,000 primary knee arthroplasties, with their revisions, at the end of 1999.