Combined Use of Retraction and Torque Arch with Mini-Screws: A Cephalometric Study

Özet

Objective: Our objective was to investigate and quantify the treatment of micro-implant-aided retraction and torque (R&T) arch ondentofacial structures.Methods: Twelve patients (mean age 21.2 years) who required orthodontic camouflage treatment were included in the study. Fol-lowing the canine distalization, mini-screws were placed between maxillary first molars and second premolars, and R&T arch wasapplied for the retraction of incisors. The vertical retraction arms of the arch were adjusted between the apex of the lateral incisor andthe alveolar bone so that the retraction force passed through the center of resistance of four incisors and forced the incisors to bodilyretraction. Closed coil-springs applying 150 gr of force were used to retract the incisors. The retraction period lasted for 217±34 days.Results: SNA and NV-A decreased (p 0.05).Conclusion: A combined use of R&T arch with mini-screws is an effective method to retract the incisors without anchorage loss. Thetype of movement is nearly parallel.