Division of Endodontics, Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudia Arabia.
J Endod. 2010 Feb;36(2):305-7. doi: 10.1016/j.joen.2009.10.032.
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.
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.
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.
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.
本研究旨在比较新型 M 型丝镍钛合金制造的 GT 系列 X 型旋转锉和传统镍钛合金制造的 GT 和 Profile 镍钛锉的循环弯曲疲劳性能。
使用 15 支每种规格为 30/0.04 的锉来评估循环弯曲疲劳性能。专门制作了一个简单的装置来测量每种锉在循环弯曲疲劳试验中失效所需的时间。
实验结果表明，GT 系列 X 锉的循环弯曲疲劳性能优于其他两种传统镍钛合金制造的锉（P =.004）。另一方面，Profile 锉和 GT 锉之间的差异没有统计学意义。
本研究结果表明，新型 M 型丝镍钛合金制造的 30/0.04 号镍钛旋转锉的循环弯曲疲劳性能优于类似设计和尺寸的传统镍钛合金锉。
