Dislocation of an artificial knee component due to extraordinary function.
A rare complication, namely dislocation of a knee component without fracture of the prosthesis and not caused by a trauma, is described in a patient who was treated for osteosarcoma of the femur. Probably the dislocation, which occurred 2 years postoperatively, was caused by an extraordinary function of this prosthesis. A partial revision of the prosthesis was performed. The newly designed knee component, which prevents dislocation, is described.
D002648:Child; D004868:Equipment Failure; D005266:Femoral Neoplasms / Q000601:surgery; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D007720:Knee Prosthesis / Q000009:adverse effects*; D008297:Male; D009068:Movement; D012516:Osteosarcoma / Q000601:surgery; D011859:Radiography