Michelon, C., De Carlo Bello, M., Mastella Lang, P., Pillar, R. and Souza Bier, C.A. 2024. Efficacy of passive ultrasonic irrigation in removing residual root filling material during retreatment: <i>ex vivo</i> analyses by micro-CT and confocal laser scanning microscope. Giornale Italiano di Endodonzia. 35, (Jun. 2024). DOI:https://doi.org/10.32067/GIE.2024.38.01.08.