Journal of Applied Oral Science, Vol 20, Iss 1, Pp 38-44 (2012) Journal of Applied Oral Science v.20 n.1 2012 Journal of applied oral science Universidade de São Paulo (USP) instacron:USP Journal of Applied Oral Science, Volume: 20, Issue: 1, Pages: 38-44, Published: FEB 2012 Journal of Applied Oral Science