The Swedish Knee Arthroplasty Register and the Swedish Hip Arthroplasty Register sponsored the 4th International Congress of Arthroplasty Registries last week in Gothenburg, Sweden. Domestic and international registry representatives presented on hip and knee arthroplasty in addition to shoulder and trauma issues. The American Joint Replacement Registry (AJRR), Function and Outcomes Research for Comparative Effectiveness in Total Joint Replacement (FORCE-TJR), Harris Orthopaedic Laboratory, Hospital for Special Surgery, Kaiser Permanente, Michigan Arthroplasty Registry Collaborative Quality Initiative (MARCQI), Mayo Clinic, and the Western Slope Study Group were among the U.S. participants. Learn more about the International Society of Arthroplasty Registers.