Too often subjected to teasing at school, children are more and more sensitive about their smile. Orthodontic treatment reinforces confidence and sefl-esteem. Early orthodontics from ages 6 to 10, for medical reasons or for prevention, is perfectly adapted to their age and allows a shorter treatment time than teenagers experience. (18 months rather than 24 to 30). For teenagers, their teeth and their smile are of the utmost importance as they become more outgoing. Orthodontics for these young adults reconciles therapeutic requirements and the feelings of the young patients.