[1] State Univ Campinas UNICAMP, Fac Odontol Piracicaba UNI CAMP, Dept Odontol Restauradora, Piracicaba Dent Sch, BR-13414903 Sao Paulo, Brazil
[2] State Univ Campinas UNICAMP, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, BR-13414903 Sao Paulo, Brazil
[3] Pontif Catholic Univ Rio Grande do Sul PUCRS, Dept Restorat Dent, Porto Alegre, RS, Brazil
[4] Univ Passo Fundo UPF, Dept Restorat Dent, Fac Dent, Passo Fundo, RS, Brazil