Segmental arch mechanics in Angle’s Class I malocclusion with crowding: A case report

An 18-year-old male presented with ectopically erupted upper and lower canines and Class I molar relation. First premolar extraction was planned to correct ectopic position of canines. Segmental 0.017 × 0.025" titanium molybdenum alloy (TMA) T-loop was used to retract the canines into an ideal position in the upper arch. After treatment, ectopically erupted canines were corrected, bilateral Class I molar connection was maintained, and incisor inclination was improved. At the end of treatment, the patient showed an improved smile.
 

Keywords: Segmental arch, T loop, Differential closure