@article{article3ac981d9,
title   = {Comparative In Vitro study of apically extruded material after four different root canal instrumentation techniques},
author = {Vansan, Luiz Pascoal and Pécora, Jesus Djalma and Costa, Wanderley Ferreira da and Silva, Ricardo Gariba and Savioli, Ricardo Novak},
year = {1997},
journal   = {Brazilian Dental Journal}
}