1 Department of Endodontics, Bahia School of Medicine and Public Health, Avenida Dom João VI, 275, Salvador, BA, 40290-000, Brazil.
2 Clinical Department, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Avenida Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil.
3 Department of Stomatology, School of Dentistry, Federal University of Santa Maria, Rua Marechal Floriano Peixoto, 1184, Santa Maria, RS, 97015-372, Brazil. remorgental@hotmail.com.
4 Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Porto Alegre, RS, 90035-004, Brazil.
Figures 2 and 3 in the published version of this article contained a mistake. CCP and DCP should have been FEG and NFEG. Correct figures are presented here.