[Clinical study of Twin-wires on anchorage on canine retraction].

PURPOSE: The purpose of the study was to evaluate the effects of anchorage by Twin-wires on canine retraction. METHODS: A sample of 15 patients with severe anterior crowding was selected (6 males, 9 females, age average: 13.7 years). All patients underwent removal of the four first premolars during orthodontic treatment. Retraction of canine was achieved by using 0.018 stainless steel wire and NiTi wire. Anchorage reinforcement as a result of this movement was evaluated. The length and width of the dental arch models were measured. Self-control t test was used for data analysis. RESULTS: The length and width of the dental arches, the canine and molar relationships remained unchanged after orthodontic treatment. CONCLUSION: Application of Twin-wires leads to canine retraction and sufficient anchorage consolidation.