An orthodontic arch wire stop (20, 170.290.300 300 350 350 400) for attachment to a wire arch (50 202), the wire arch stop (20,250,300, 300, 30, 30,940, 400) comprising : A body (26, 174, 208, 306, 326, 343, 402) made of a material selected from the group consisting of a super-elastic metallic alloy, cold-worked beta-III titanium, and treated beta-III titanium dioxide thermal in solution and aged； the body (26, 174, 208, 306, 326, 343, 402) has a first and a second arm which are separated (40,42,178,180,220,222) and connected to each other； the first arm (40,178,220) includes a first jaw section (44,226,350) with a first inner surface intended for fastening the wire arch (78,268,346)； the second arm (42,180,222) includes a second jaw section (46,230,352) with a second inner surface intended for fastening the wire arch (80,270,348)； Both inner clamping surfaces (78,80,268,270,346,348) are facing and separated by a space, the space between the first and second inner clamping surface (78,80,268,270,346,348) delimits a receptacle (48,232,342) intended to receive the wire arc ( 50,202), at least part of the receptacle for the wire arc (48,232,342) is smaller than said arc (50,202)； The body (26,174,208,306,326,343,402) also includes an entrance (70,252) limited between the first and second arm (40,42,178,180,220,222), the entrance (70,252) gives access to the wire arch of the receptacle (48,232, 342)； The first and second arms (40,42,178,180,220,222) are externally elastic and deflectable from each other when the wire arch (50,202) is introduced through the inlet (70,252) into the wire arch of the receptacle (48,232,342)； The first and second inner clamping surface (78,80,268,270,346,348) are attached to the wire arc (50,202) and is applied opposing the clamping forces against the wire arc (50,202) thus substantially preventing it from moving from the top of the arc of wire (20,170,200,300,320,340,400) in relation to the wire arc (50,202) at least one mesial or distal di
