Pereira, K.F.S. et al. 2024. Comparing the Efficiency of Single versus Dual Ultrasonic Devices for Metallic Post Removal in Endodontic Retreatment: A Clinical Study. Iranian Endodontic Journal. 19, 3 (Jun. 2024), 189–192. DOI:https://doi.org/10.22037/iej.v19i3.41817.