Comparative evaluation of smear layer removal with Ultra-X device and XP-Endo Finisher file system: an ex-vivo study: Smear removal on using various activation devices. G Ital Endodon [Internet]. 2023 Sep. 13 [cited 2025 Oct. 10];37(2). Available from: https://www.giornaleitalianoendodonzia.it/gie/article/view/419