title: Letter to the editor.
authors.affiliation: Department of Community and Preventive Dentistry, School of Dentistry, Rio de Janeiro State University, Boulevard 28 de Setembro, 157 2° andar, Vila Isabel, Rio de Janeiro, RJ 20551-030, Brazil. Electronic address: ana.paulapires@uol.com.br.
authors.forename: Ana Paula Pires
authors.initials: AP
authors.lastname: dos Santos
authors.affiliation: Department of Community and Preventive Dentistry, School of Dentistry, Rio de Janeiro State University, Boulevard 28 de Setembro, 157 2° andar, Vila Isabel, Rio de Janeiro, RJ 20551-030, Brazil.
authors.forename: Branca Heloisa
authors.initials: BH
authors.lastname: de Oliveira
authors.affiliation: Department of Epidemiology, Institute of Social Medicine, Rio de Janeiro State University, Rio de Janeiro, Brazil.
authors.forename: Paulo
authors.initials: P
authors.lastname: Nadanovsky
mesh_terms: D002327:Cariostatic Agents / Q000008:administration & dosage*; D003731:Dental Caries / Q000517:prevention & control*; D005459:Fluorides / Q000008:administration & dosage*; D009050:Fluorosis, Dental / Q000517:prevention & control*; D006801:Humans; D014100:Toothpastes / Q000627:therapeutic use*
chemical_list: D002327:Cariostatic Agents; D014100:Toothpastes; D005459:Fluorides