Abstract: The device includes a medullary rod that is locked to a bone of a patient and that has at least one threaded hole with an axis parallel to the femoral neck of the bone, at least one self-drilling, self-tapping screw designed to pass through the hole in the rod and to engage the femoral neck of the bone, at least one sleeve designed to fit around a proximal end of the screw and to be threaded into the hole in the rod, and a shoulder on the sleeve for immobilizing the sleeve relative to the rod. According to the invention, the proximal end of the screw has a circular cross section which is formed to slide within a bore in the sleeve. Each sleeve has a threaded exterior portion which engages the threaded hole, and a proximal end portion shaped to allow the sleeve to be threaded into the hole in the rod. The shoulder on the sleeve bears against the rod to immobilize the sleeve relative to the rod when the sleeve has been fully threaded into the hole.

Abstract: A locking device has a metal locking part in which channels are provided to accommodate the upper ends of elongate pins. The lock preferably has a shape that is trapezoidal in longitudinal transverse section, has channels each having one blocked end to accommodate a pin, and is designed to be introduced into a recess of matching shape provided in the bone to be locked thereto. The ends of the pins, opposite the ends where the lock is located, are recurved to immobilize the pins relative to the bone both along their longitudinal axes and rotationally. The upper ends of pins are cut at the required length and introduced into the channels so that the upper blocked end of each of the channels of the lock opposes the upward and vertical forces transmitted by each of the pins.