Amre R., Atmeh2024-10-022024-10-022024304-2024.15https://repository.mbru.ac.ae/handle/1/1526Abstract: This study aimed to compare apical debris extrusion and canal preparation time with ProTaper Gold (PTG) and ProTaper Ultimate (PTU) files at different temperatures. Mesio-buccal roots of 60 mandibular first molars were distributed into six groups depending on the file type (PTG, PTU) and irrigation solution temperature (20, 37, 45°C). During instrumentation, extruded debris were collected and weighed to measure the mass in milligrams. The canal preparation time was recorded in seconds. ANOVA followed by Bonferroni post-hoc tests were used for analysis. The amount of debris extrusion was significantly higher in PTU, which was affected by the irrigation solution temperature (p <0.05). The difference in canal preparation time was not significant between the two file systems, however, it was significant between the different temperatures (p=0.001). Both file systems had shorter canal preparation times at 20°C. The irrigation solution temperature could influence the debris extrusion and time of canal preparation.Apical debris extrusionHeating irrigationProTaper GoldProTaper UltimateBook