A kit comprising: a first bracket for attachment to a first tooth, a second bracket for attachment to a second tooth, a third bracket for attachment to a third tooth, wherein the first, second and third brackets comprise an archwire slot and wings surrounding the archwire slot, and an orthodontic device (10; 20, 30; 40; 50) configured to be fitted around the first, second and third brackets and to pull the first, the second and the third tooth closer together, wherein the orthodontic device (10; 20; 30; 40; 50) comprises a first opening (11; 21; 31; 41) for receiving the wings of the first bracket, a second opening (12; 22; 32; 42) for receiving the wings of the second bracket, and a third opening (13; 23; 33; 43) for receiving the wings of the third bracket, and an intermediate structure connecting the first, second and third openings (11-13; 21-23; 31-33; 41-43), wherein the first, second and third openings (11-13; 21-23; 31-33; 41-43) are aligned along a longitudinal axis of the orthodontic device, the longitudinal axis of the orthodontic device extending between one end and the opposite end of the orthodontic device, characterised in that the orthodontic device (10; 20; 30; 40; 50) is made from a superelastic metallic material. a first bracket for attachment to a first tooth, a second bracket for attachment to a second tooth, a third bracket for attachment to a third tooth, wherein the first, second and third brackets comprise an archwire slot and wings surrounding the archwire slot, and an orthodontic device (10; 20, 30; 40; 50) configured to be fitted around the first, second and third brackets and to pull the first, the second and the third tooth closer together, wherein the orthodontic device (10; 20; 30; 40; 50) comprises a first opening (11; 21; 31; 41) for receiving the wings of the first bracket, a second opening (12; 22; 32; 42) for receiving the wings of the second bracket, and a third opening (13; 23; 33; 43) for receiving the wings of the third bracket, and an intermediate structure connecting the first, second and third openings (11-13; 21-23; 31-33; 41-43), wherein the first, second and third openings (11-13; 21-23; 31-33; 41-43) are aligned along a longitudinal axis of the orthodontic device, the longitudinal axis of the orthodontic device extending between one end and the opposite end of the orthodontic device, characterised in that the orthodontic device (10; 20; 30; 40; 50) is made from a superelastic metallic material. a first opening (11; 21; 31; 41) for receiving the wings of the first bracket, a second opening (12; 22; 32; 42) for receiving the wings of the second bracket, and a third opening (13; 23; 33; 43) for receiving the wings of the third bracket, and an intermediate structure connecting the first, second and third openings (11-13; 21-23; 31-33; 41-43), wherein the first, second and third openings (11-13; 21-23; 31-33; 41-43) are aligned along a longitudinal axis of the orthodontic device, the longitudinal axis of the orthodontic device extending between one end and the opposite end of the orthodontic device, characterised in that the orthodontic device (10; 20; 30; 40; 50) is made from a superelastic metallic material.