Affiliation: | 1. Department of Orthodontics and Pediatric Dentistry, School of Dentistry;2. Assistant Professor, Department of Orthodontics and Pediatric Dentistry;3. Department of Oral Pathology, Special Care Dentistry Center, School of Dentistry;4. Chairman, Department of Oral Pathology, Special Care Dentistry Center, School of Dentistry, University of S?o Paulo, S?o Paulo, Brazil. |