Complex posttraumatic conditions in the proximal femur can be difficult to treat because of severe bone loss. A possible solution to this problem is the Wagner prosthesis. The results of 23 replacements in 22 patients are described. They were satisfactory in most cases for the given preoperative status. Using the Merle d'Aubigné scoring system, 17 results were good, while 6 were fair or poor, mostly related to problems in immediate mobilization due to the general condition of the patient.