Cutting ability of nickel-titanium rotary systems ProTaper, Mtwo and K3

Resumo

Nickel-titanium rotatory systems should remove dentin
during the root canal preparation to promote the enlargement
and tapered shape with continuously narrowing towards the apex.
Objective: The aim of this study was to analyze the cutting ability
of three NiTi rotatory systems (n = 12): ProTaper (group 1), Mtwo
(group 2), and K3 (group 3). Material and methods: Thirty six
maxillary molar teeth were weighted on an analytical balance before
and after the rotatory preparation of the mesio-buccal root canal.
Data was statistically analyzed by ANOVA and Tukey’s test with a
significance level of 5%. Results: The results revealed the following
mass differences (g) before and after the root canal preparation:
ProTaper (group 1 – 0.0159 ± 0.004), Mtwo (group 2 – 0.0125 ±
0.002), and K3 (group 3 – 0.007 ± 0.003). Conclusion: ProTaper
showed the highest cutting ability among the three tested nickeltitanium rotatory systems followed by Mtwo and K3.