Journal of Applied Oral Science v.20 n.4 2012 Journal of applied oral science Universidade de São Paulo (USP) instacron:USP Journal of Applied Oral Science, Volume: 20, Issue: 4, Pages: 472-477, Published: AUG 2012 Journal of Applied Oral Science, Vol 20, Iss 4, Pp 472-477 (2012) Journal of Applied Oral Science