Comparative analysis of the diameter of MTwo® system gutta-percha points in relation to their corresponding instruments

Resumo

This study aimed to compare the diameter of sizes 25/.06,
30/.05, 35/.04, 40/.04 and 25/.07 main gutta-percha point of MTwo®
system in relation to their corresponding nickel-titanium instruments.
Material and methods: For this purpose, the measurements of both
the main gutta-percha points and their corresponding instruments
were obtained with the aid of a caliper at the positions D1, D3 and
D11. Twenty points and six instruments of each size were used.
Results: Data were subjected to student t test, with a significance
level of 5%. It could be observed that there was a variation in the
diameter of the gutta-percha points in relation to the diameter of
the instruments. At D1 and D3, size 25/.07 points had diameters
significantly higher than their respective instruments. At D11, sizes
25/.06, 25/.07, 30/.05 and 35/.04 points also had significantly higher
diameters. For size 40/.04 point, there were no statistically significant
differences between the point and instrument diameters. Conclusion:
Most of the main gutta-percha points of MTwo® system analyzed
in this study showed significantly greater diameters than those of
their corresponding instruments. Only the size 40/.04 points did
not present significant differences in diameter compared with their
corresponding instrument.