Osteosynthetic device for treating subtrochanteric and pertrochanteric fractures and fractures of the neck of the femur

The invention relates to an osteosynthesis aids (10) for supplying subtrochanteric, pertrochanterer and femoral neck fractures with a proximal into the medullary canal of a femur (11) insertable locking nail (12) having a distal portion (15) and a proximal portion (14) having an oblique passage opening (16). Due to the oblique passage opening (16) therethrough is from laterally into the neck (17) and femoral head (18) has a neck portion (19) inserted. The neck part (19) has at its outer, the Fermurkopf (18) facing away from the end of a radially projecting shoulder, in particular a circumferentially extending collar (33) on which the lateral introduction of the neck part (19) into the oblique passage opening (16 ) of the locking nail (12) is limited.