Kazemipoor, M., Azad, S. and Farahat, F. 2017. Concurrent Effects of Bleaching Materials and the Size of Root Canal Preparation on Cervical Dentin Microhardness. Iranian Endodontic Journal. 12, 3 (Jul. 2017), 298–302. DOI:https://doi.org/10.22037/iej.v12i3.15774.