1. School of Dentistry; Faculdade Integral Diferencial - Devry/Facid; Teresina PI Brazil
2. Department of Pediatric Dentistry and Orthodontics; School of Dentistry; Federal University of Minas Gerais; Belo Horizonte MG Brazil
3. Department of Pathology and Dentistry Clinic; School of Dentistry; Federal University of Piauí; Teresina PI Brazil