Affiliation: | 1.Departamento de Estomatologia, Faculdade de Odontologia da Universidade Federal de Santa Maria, Cidade Universitária-26F, Av. Roraima, 1000, Santa Maria, Rio Grande do Sul, 97015-372, Brazil ;2.Department of Pediatric Dentistry and Orthodontics, School of Dentistry, University of S?o Paulo, S?o Paulo, S?o Paulo State, Brazil ;3.College of Dentistry, University of Saskatchewan, Saskatoon, SK, Canada ; |