Akhlaghi, N.M., Delvarani, A., Norouzi, V., Mohebbi, P. and Meraji, N. 2018. Incidence of Dentinal Crack Formation Using ProTaper Universal and WaveOne Systems in Straight and Curved Root Canals. Iranian Endodontic Journal. 13, 4 (Oct. 2018), 549–553. DOI:https://doi.org/10.22037/iej.v13i4.21114.