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Orthodontic management of a buccally blocked-out canine requires a substantial amount of bodily movement, which is difficult to perform because of its long and bulbous root. Even when orthodontic forces are applied in a desired direction, large hyalinized areas are created which impede the root movement. Palatal root torque is needed for the canine to increase the buccal bone thickness, decrease the risk of bone dehiscence and gingival recession. Closing loops generate a distal force along with an extrusive component which retracts the canine into the extraction space but lacks control on the torque of the canine. To overcome this limitation, this simultaneous torquing, aligning, and retraction spring was designed. It can be easily fabricated, activated at chairside for either simultaneous or sequential controlled three-dimensional tooth movements

Simultaneous torquing, aligning and retraction spring: A three-dimensional approach for blocked out canines