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Department of Orthopaedic Surgery, Frederiksberg Hospital, Department of Orthopaedic Surgery, Rigshospitalet, University of Copenhagen (Denmark)
Background. Total knee arthroplasty is being used increasingly for the treatment of advanced knee joint disease. However the incidence of total knee replacement operations performed in Denmark has not been previously reported. The incidence of total knee replacement was studied in Copenhagen during a 17 year period from 1979 to 1995.
Methods. During a period of 17 years (January 1979-December 1995) all patients operated with a total knee replacement at Frederiksberg University Hospital were recorded.
Results. A total of 618 primary total knee replacements were performed (468 in women and 150 in men). The mean age was 72 years (range 35-89 years). The underlying disease among patients who underwent total knee arthroplasty was osteoarthritis in 574 cases, rheumatoid arthritis in 26 cases and various other conditions in 18 cases. The overall incidence was 41.3/100,000 inhabitants/year. The incidence for the population aged over 50 years was 103/100,000. The incidence increased from 15.9 per 100,000 persons in 1979 to 76.1 per 100,000 in 1995.
Conclusions. The incidence of primary total knee arthroplasty was similar to the incidence found in Finland and Sweden but somewhat lower than reported in the USA.