Azevedo, K.C.M., Pereira, A.G., Oliveira, M.A.V.C. de, Raposo, L.H.A., Sousa-Neto, M.D., Pécora, J.D. and Biffi, J.C.G. 2016. Micro-computed tomographic evaluation of removal and extrusion of root filling material during canal retreatment . Bioscience Journal . 32, 4 (Jul. 2016), 1110–1117. DOI:https://doi.org/10.14393/BJ-v32n4a2016-33193.