P. Aguilar, T. Samerpark, B. . Nopphachatsatid, and K. Krathong, “Comparison of Debris Extrusion, Completeness of Removal and Operation Time in Different Rotational Speed of Root Canal Filling Removal by XP-endo Finisher R File ”, Khon Kaen Dent J, vol. 23, no. 2, pp. 57–65, Aug. 2020.