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Comparitive evaluation of canal shaping ability of three nickel titanium instrument systems using cone beam computed tomography: An in vitro study

Aim: The aim of the study is to evaluate the canal transportation and canal centering ability of WaveOne, ProTaper, and F6 SkyTaper nickel-titanium instrument systems using cone beam computed tomography (CBCT). Materials and Methods: A total of 45 mandibular first molars with a curvature angle ranging from 20° to 40° of the mesiobuccal canal were included and randomly divided into three groups with 15 specimens each according to the rotary systems used: in Group 1, specimens were prepared with WaveOne system, in Group 2, specimens were prepared with ProTaper rotary system, and in Group 3, specimens were prepared with F6 SkyTaper rotary system. CBCT was used as a diagnostic method to evaluate centering ratio and canal transportation at 1, 3, 5, 7 mm from apical foramen. Statistical Analysis: To evaluate canal centering ratio and canal transportation between file systems, one-way analysis of variance and post hoc Tukey tests were used. Results: Statistically, significant differences are well-established between the different files though all the files conserved the aboriginal canal curvature. WaveOne files exhibited lesser transportation and stayed better centered in the root canal system than F6 SkyTaper and Rotary ProTaper files. Conclusions: WaveOne files showed slighter transportation and better centering ability than F6 SkyTaper and ProTaper.