Affiliation: | a Postgraduate student, Department of Orthodontics, School of Dentistry, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil b Assistant professor, Department of Orthodontics, School of Dentistry, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil c Assistant professor, Department of Oral Radiology, School of Dentistry, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil d Associate professor, Department of Pediatrics, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil |