A review of the hip replacement operations performed by the department of orthopaedics of the University Hospital of Freiburg follows. The operation brought "very good" results for 14.4% of those operated upon, "good" results for 50.6% and satisfactory results for 29.7%. The results of the operation were unsatisfactory for 5.6% of the patients. In view of the possible complications, the results will be discussed.