Abstract: A fixing device (1; 20) for orthodontic devices comprising; a screw (2; 44) complete with an operating head (3; 42) with longitudinal slots (4; 45) for the insertion of orthodontic devices and a threaded shank (5) designed to be screwed inside the patient's oral cavity; means for fixing orthodontic devices contained inside the operating head (3; 42). The fixing means comprise a shaped body (6) engaging inside a recess (7; 47) in the operating head (3; 42) and revolvable inside the recess (7; 47). The shaped body (6) has a through opening (8) for the insertion of the orthodontic device and opposing means that anchor the orthodontic device to the operating head (3; 42) when the shaped body (6) is rotated inside the recess (7; 47) after the orthodontic device has been inserted in the through opening (8) and in the longitudinal slots (4; 45).

Abstract: The invention relates to an orthodontic screw with a self-ligating fixing system for orthodontic apparatuses with a filiform part comprising a head equipped with at least one longitudinal slot for the insertion of said filiform part, a threaded shank to be applied to the bone of the mouth and a stop means to reversibly block said filiform part. The stop means is a fork comprising at least two teeth and the head features at least one through hole made in one of the walls which delimit the slot, and said hole has a corresponding second through or not through hole in the opposite wall delimiting the slot and in which the axis that runs through both holes is located above the filiform part insertable in said slot. In addition, the invention regards a related system and an orthodontic kit comprising said screw.