Centering and Shaping abilities of three different cross-section rotary systems in curved canals using CBCT

Abstract

The aim of the study was to examine the centering and shaping abilities of the E3 Azure, T Blue, and XPRS rotary devices in severely curved root canals utilizing CBCT. 51 mesial roots were used in this study, then distributed into three groups of 17 mesial canals each according to the instrumentation technique: T-Blue, E3 Azure, and XPS. The final apical size of instrumentation was 30/0.04 for all groups. At 2 mm, all pairwise comparisons were statistically significant, with Azure showing the highest transportation, followed by T-Blue, and XPS showing the least (p<0.001). At 4 mm and 6 mm, Azure and T-Blue showed significantly higher transportation than XPS (p<0.001). For XP-Shaper files, centering ratios followed a descending order from 6 mm to 4 mm and were lowest at 2 mm, with all pairwise comparisons being statistically significant (p<0.001). It was concluded that XPS showed lesser transportation and better centering ability.