Comparison of the shaping ability of Mtwo and S5 NiTi rotary files in simulated canals

Abstract

OBJECTIVE: The aim of this study was to compare the shaping ability of Mtwo and S5 nickel-titanium rotary instruments during the preparation of simulated curved canals. MATERIALS and METHOD: Forty simulated canals were randomly assigned to two groups (n=20). Canals were prepared to apical size 30 by using Mtwo or S5 files. Preoperative and postoperative images of the canals were obtained by using a digital camera, images were superimposed and aberrations were recorded. Material removal was measured at 5 different points. Statistical analysis was performed using Kolmogorov-Smirnov test, independent t-test and chi-square test at a significance level of 0.05. RESULTS: The mean total width of the canals in the Mtwo group was significantly greater than the S5 group except the apical end-point of the preparation (p0.05). CONCLUSION: Mtwo produced wider canal shape. S5 provided more centered apical preparation and maintained the original canal shape well.