[1] Univ Fed Rio Grande do Sul, Grad Program Dent Sci, Porto Alegre, RS, Brazil
[2] Univ Fed Santa Maria, Grad Program Dent Sci, Santa Maria, RS, Brazil
[3] Univ Fed Santa Maria, Dept Restorat Dent, Santa Maria, RS, Brazil
[4] Univ Fed Santa Maria, Dept Stomatol, Rua Marechal Floriano Peixoto 1184, BR-97015270 Santa Maria, RS, Brazil