Implantable bone fixations apparatus comprising a pair of plates (1 and 1′) provided with holes (11, 12, 13) for receiving compression and/or locking screws and with longitudinal slots (15), characterized by a union element (3) disposed between the plates (1, 1′) such as to bridge the bone parts that need to be united, the union element (3) comprising rods that cooperate with the longitudinal slots (15) of the plates (1, 1′).
