Abstract: A bone fracture fixation device according to the present invention includes an intramedullary nail and an intramedullary nail head. The intramedullary nail head can be set and fixed on the proximal end of the intramedullary nail and has at least one bore which extends transversely to the central axis of the intramedullary nail for form-fittingly receiving at a stable angle a bone fastener. At least one threaded bore is provided between the distal end and the proximal end of the intramedullary nail.

Abstract: The intramedullary nail for treating a fracture of a long bone according to the present invention has the shape of a helically twisted blade with a flattened cross section extending partially or totally along the longitudinal axis of the nail. The nail is provided with a hole at its distal end for receiving a bone fixation means to be inserted transversely through the hole and at least one cortex of the long bone. The nail is made long and thin with the smallest dimension of the cross section being much smaller than the largest dimension, so that it is flexible along the longitudinal axis of the nail.