Exploring the Potential of Segmental T-loop in Two Different Clinical Situations


  • All India Institute of Medical Sciences, New Delhi, Division of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, 110029, India


This report describes the successful orthodontic treatment of two cases of highly placed canine with different clinical situations using segmental T-loop. The objective of this study was to evaluate the modification in T-loop on differently angulated canine. Orthodontic treatment of highly placed canine is justified as its aberrant position may damage the roots of adjacent teeth. In addition to it, functional occlusion and esthetic balance are achieved after orthodontic treatment. Malocclusion with severe crowding is difficult to treat without extraction as it compromises the patient's profile. Cases were managed with extraction of both maxillary and mandibular first premolars followed by Canine retraction with 0.017 in. × 0.025 in. TMA wire segmented T-loop spring using 0.022 in. × 0.028 in. (edgewise appliance). Different moments were applied for canine retraction at different axial inclinations. After treatment, satisfactory improvements in facial profile and lip competency with normal overjet and overbite without marked gingival recession and anchorage loss were observed.


Highly placed canine, Segmental T loop, Severe crowding

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