Objectives The aim of the current study was to evaluate the canal transportation and centering ability of Neoniti and WaveOne in curved canals in three levels (apical, middle and coronal) using cone beam computed tomography (CBCT).
Methodology Thirty mandibular first and second molars were collected then access cavity was prepared in each tooth. Only teeth with mesiobuccal canals with angle of curvature ranged between 25- 40° according to Schneider's method were selected then the samples were divided into two equal groups; Group A, Neoniti and Group B, WaveOne. Canal transportation and centric ability of each group were evaluated after instrumentation using CBCT at the three cross-section planes (apical, middle and coronal). Comparisons between the cross-sections and the two instruments were carried out using Oneway-ANOVA, student's t-test and comparison between Categorical data were done by chi square test or fisher exact, p≤0.05.
Results There was no statistically significant difference between the two single file systems regarding canal transportation in all cross-sections (p≥0.05) and both instruments were able to remain centered in the canal with different degrees
Conclusion canal transportation and centering ability of Neoniti with full rotation motion did not significantly differ from that of WaveOne with reciprocation motion, other factors than the motion pattern may affect the canal transportation and centering ability of the single-file.