Affiliation: | 1. Postgraduate Program in Dentistry, Federal University of Maranh?o, S?o Luís, Maranh?o, Brazil;2. Postgraduate Program in Public Health, Federal University of Maranh?o, S?o Luís, Maranh?o, Brazil;3. Dentistry Course, CEUMA University, S?o Luís, Maranh?o, Brazil;4. Graduate Program of Medicine, Federal University of Maranh?o, S?o Luís, Maranh?o, Brazil |