Abstract

This case report presented the use of ISW (improved super-elastic Ti-Ni alloy wire, developed by Tokyo Medical and Dental University) in orthodontic treatment for a 34- year-old female patient who has skeletal Class I malocclusion combined with crowded upper anterior teeth, anterior crossbite, a missing maxillary canine and slight concave profile. In this case, mechanism including the use of reverse curve of ISW for dental crossbite correction, elastic chain for space closure, intermaxillary elastics for a better interdigitation, and substitution of maxillary first premolar for a missing canine were discussed. The total treatment time took 1 year and 7 months. Finally, after orthodontic treatment, an attractive profile was obtained, and the patient was satisfied with the treatment outcome.