Silveira, L.F.M., Bosembecker, J.K., Martos, J. and Ferrer-Luque, C.M. 2011. The quality of apical preparation in curved root canals using hand and rotary instrumentation techniques. Archives of Oral Research. 7, 3 (Nov. 2011). DOI:https://doi.org/10.7213/aor.v7i3.23090.