#$%^&*AU2010226866B220120405.pdf#####-20 ABSTRACT 5 Intramedullary nail (10) suitable for insertion in a fractured elongate bone (12), comprising a stem (14) extending along a determined axis between a proximal end (16) and a distal end (18), a plurality of elements (20) which are made of at least a shape-memory material, and a plurality of seats (19) formed in the stem (14) for housing said elements (20), wherein said 10 elements (20) are suitable to take a first shape wherein they are retractably housed in the respective seats (19), and a second shape wherein they project from the respective seats (19), wherein the nail comprises a tubular jacket (40) for sheathing the stem (14), having the function of retaining the shape-memory elements (20) in the first shape, i.e. in the close retractable 15 position in the seats (19), the jacket (40) comprising a side wall (41), and a plurality of transversal elongate holes (42), made on the side wall (41), wherein the jacket (40) and the stem (14) can be shifted with respect to each other along the axis of the stem from a first operative position wherein the side wall (41) of the jacket (40) retains the shape-memory 20 elements (20) in the first retractable shape in the seats (19), and a second operative position wherein the transversal holes (42) of the jacket (40) are aligned to the seats (19) of the stem (14), so as to allow the arrangement of the elements (20) projecting from the respective seats (19), characterised in that it comprises a control screw (45), suitable to be rigidly 25 connected to a head portion (14a) of the stem (14) for controlling, by means of rotation around its own axis, an axial shift of the stem (14) with respect to the jacket (40),
