Comparison of monozygotic twins who received orthodontic treatment with self-ligated and conventional brackets: Case report

This study objectived to compare the performance of different brackets, conventional and self-ligated, under similar conditions, in monozygotic twins patients with severe tooth crowding. It was evaluated the rapidness of treatment, chair time, quality of finalization, comfort and hygiene of the patients. The treatments had a duration of 24 months in both cases, however, with the conventional appliance, less time was required for performing alignment and leveling. Whereas, treatment with the self-ligated appliance required fewer appointments, and chair time was reduced about 20%. Both patients had satisfactory hygiene, and did not complain of discomfort during the treatment. The self-ligated appliance was not superior, as both cases presented similar results and were concluded at the same time.