Effect of heat treatment on K3, K3XF and MTwo endodontic files F. M. Braz Fernandes, J. P. Oliveira, A. M. Machado, A. R. Alves and N. Schell MATEC Web of Conferences, 33 (2015) 03016 Published online: 07 December 2015 DOI: 10.1051/matecconf/20153303016