Effect of fentanyl on the success of inferior alveolar nerve block for teeth with symptomatic irreversible pulpitis: a randomized clinical trial: Efficacy of Lidocaine combined with fentanyl for IANB. (2022). Giornale Italiano Di Endodonzia, 36(1). https://doi.org/10.32067/GIE.2021.35.02.56