1. Department of Restorative Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
2. Department of Orthodontics, Uningá University Center, Maringá, Paraná, Brazil
3. Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil
4. Department of Orthodontics, Faculty of Dentistry, University of Toronto, Toronto, Canada