[1] Univ Sao Paulo, Sch Dent, Dept Periodont, Sao Paulo, SP, Brazil
[2] Univ Chile, Sch Dent, Dept Conservat Dent, Santiago, Chile
[3] Univ Sao Paulo, Sch Dent, Dept Community Dent, Sao Paulo, SP, Brazil
[4] Pontificia Univ Catolica Madre & Maestra, Sch Dent, Dept Periodontol, Santo Domingo, Dominican Rep
[5] Univ Peruana Cayetano Heredia, Acad Dept Clin Stomatol, Lima, Peru
[6] Univ Fed Rio Grande Sul UFRGS, Fac Dent, Dept Periodontol, Porto Alegre, RS, Brazil
[7] CES Univ, Sch Dent, Dept Periodont, Medellin, Colombia
[8] Pontificia Univ Catolica Rio De Janeiro PUCRS, Sch Dent, Dept Periodont, Rio De Janeiro, RJ, Brazil
[9] Latin Amer Oral Hlth Assoc LAOHA, Sao Paulo, SP, Brazil
[10] Colgate Palmol Co, Colgate Technol Ctr, Piscataway, NJ USA