[Replacement of loose cemented total prosthesis of the hip by cementless prosthesis of the madreporic type (author's transl)].

The authors have inserted 77 cementless prosthesis of the madreporic type in cases of loosening of previously-inserted cemented prosthesis. 66 p. 100 of satisfactory results have been obtained with a follow up of one to six years. The analysis have shown that those with good results achieved stability in the course of time. The technique is fully described. In some cases bone grafting was necessary. In five cases a fracture of the femur was done during the operation. The possibility of a flare-up of infection is discussed. The authors consider that the absence of cement diminishes the liability to septic complications.