A cleaver way to have torque and intrusion in segemntated orthodontics
Columbus Spring NEGATIVE TORQUE
Columbus Spring Negative Torque is an innovative device designed to provide movements on the canines when they are buccal translated and a radicolo-bucal torque is required. The technique, which aims to extend the length between the engagement points and to reduce the friction of its components, requires a second buccal arch (auxiliary arch ) at which one or more devices are connected, and once activated, they transfer the movements to the teeth. Unlike conventional methods that stress with heavy forces the adjacent teeth and have wire-brackets playing disadvantages, the columbus technique, is able to align the elements easly, thanks to a better force control on the whole tooth.
Columbus Spring with its unique design, combined with high elesticity TMA wires , uses gentile and constant forces with a very low load-deflection ratio.
Step 1
Place the auxiliary arch in the molar gingival tubes, slide the front Columbus device until it meets the vertical slot on the buccal treanslated canine that requires the torque movements, and crimp it.
Step 2
Place the hooks on the wire and crimp them 2mm away from the molar tubes and tie them back with a ligature. It’s important that the arch is bilaterally tied up using the hooks to avoid them to disingage during the treatment.
In accordance with the treatment plan bend the device vertical wire to 20 degrees from the tooth axis to provide torque forces.
Step 3
Fix the front device on the anterior bracket with ligatures. In this position Columbus Spring transmits the root-buccal forces as shown in the picture.
