“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”, G Ital Endodon, vol. 36, no. 1, Apr. 2022, doi: 10.32067/GIE.2021.35.02.56.