Abstract
Introduction
This study was conducted to investigate cyclic flexural fatigue resistance of GT series
X rotary files made from the newly developed M-wire nickel-titanium alloy compared
with GT and Profile nickel-titanium files made from a conventional nickel-titanium
alloy.
Methods
Fifteen files, size 30/0.04, of each type were used to evaluate the cyclic flexural
fatigue resistance. A simple device was specifically constructed to measure the time
each file type required to fail under cyclic flexural fatigue testing.
Results
The results of this experiment indicated that the GT series X files had superior cyclic
flexural fatigue resistance than the other 2 file types made from a conventional nickel-titanium
alloy (P = .004). On the other hand, the difference between the Profile and the GT files was
not statistically significant.
Conclusions
The findings of this study suggest that size 30/0.04 nickel-titanium rotary files
made from the newly developed M-wire alloy have better cyclic flexural fatigue resistance
than files of similar design and size made from the conventional nickel-titanium alloy.
Key Words
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Article info
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Copyright
© 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
