Epexegesis to the Norwegian Orthopaedic Register

National orthopaedic registries compile databases regarding the procedures and outcomes. Registers while used in policy development, projecting future trends and resource allocation also provide a means to monitor patient care, implant performance, support evidence-based practices and a scale in which to assess quality improvement in orthopaedic surgery. These databases can also facilitate shared decision-making between patients and surgeons. Since international databases exist on joint prostheses that can be used to generate a comparative analysis between different countries. By standardizing data collection among countries, one can compare various geographical and demographic factors that may play a role in data variation. In this paper, data from the “Norwegian National Network for Arthroplasty and Hip Fracture” registry was collected, and statistical analysis performed to identify differences and trends in the Norwegian data. The focus of this paper is on knee arthroplasties and, more specifically, the reasons for primary arthroplasty, revision surgery, and reoperation surgery. We compared the Norwegian data with Sweden, Switzerland, England, and Australian registries, however, due to reporting inconsistencies, no comparison was generated. Thus, this paper adds an epexegesis to the Norwegian National Registry on reasons for revisions data and constitutes a part of course work in Experimental Orthopaedic Engineering (BME 7220).