Niavarzi, Soheil, Sholeh Ghabraei, and Fatemeh Malekpour. 2022. “Mandibular Second Premolar With Four Canals: A Case Report: Root Canal Treatment Considerations of Mandibular Second Premolar With Four Canals”. Iranian Endodontic Journal 17 (4):209-11. https://doi.org/10.22037/iej.v17i4.38604.