Also the authors' Department shares SPIER's opinion, according to which the ideal treatment of the proximal femur fractures is the osteosynthesis, with the greatest stability. The aim of surgical treatment of the fracture is the motion-stable and possibly loading-stable osteosynthesis. Since proximal femur fractures occur mostly in aged patients, the survival is considerably augmented by early and efficacious mobilization. If the general state of the patient is suitable, after consultation with the anaesthesiologist and the internist the surgical intervention is carried out. AO-condyle-plate yields further possibility to the loading-stable osteosynthesis of the pertrochanteric fractures.