Niavarzi S, Ghabraei S, Malekpour F. Mandibular Second Premolar with Four Canals: A Case Report: Root canal treatment considerations of mandibular second premolar with four canals. Iran Endod J [Internet]. 2022 Oct. 1 [cited 2024 Apr. 26];17(4):209-11. Available from: https://journals.sbmu.ac.ir/iej/article/view/38604