Transportation and shaping ability of 3 canal anatomy-friendly systems in curved root canals

Abstract

Aim: In this study, we aimed to compare the shaping efficacy of the TruNatomy (TRN), XP-endo Shaper (XPS), and 2Shape (TS) NiTi rotary systems in terms of canal transportation, centering ratio, and removed dentin volume using cone beam computed tomography (CBCT).Material and Methods: Sixty mesial root canals of mandibular first molar teeth with a curvature angle of 20-40 & DEG; and curvature radius of 4-6 mm were allocated to three groups (n=20). Instrumentation was performed in compliance with the manufacturer's instructions. CBCT images were taken in the same position before and after instrumentation. Canal transportation and the centering ratio were calculated at 3, 6, and 9-mm distances from the apex. Data were statistically analyzed.Results: TS group had significantly higher transportation (P<0.05) and there was no significant difference between the TRN and XPS groups. In terms of centering ability, no significant difference was detected between the groups (P>0.05). The volume of removed dentin was significantly lower in the TRN group (P<0.05) and there was no significant difference between the XPS and TS groups. Discussion: XPS and TRN groups showed less transportation than TS, whereas the centering ability was similar for all groups. In addition, the TRN group removed significantly less dentine, supporting the minimally invasive endodontic approach.