Samiei, M., Torab, A., Hosseini, O., Abbasi, T., Abdollahi, A.A. and Divband, B. 2018. Antibacterial Effect of Two Nano Zinc Oxide Gel Preparations Compared to Calcium Hydroxide and Chlorhexidine Mixture. Iranian Endodontic Journal. 13, 3 (Jul. 2018), 305–311. DOI:https://doi.org/10.22037/iej.v13i3.19866.