Department of Endodontics, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey.
Department of Endodontics, Faculty of Dentistry, Istanbul Medeniyet University, Istanbul, Turkey.
Odontology. 2019 Apr;107(2):190-195. doi: 10.1007/s10266-018-0388-8. Epub 2018 Sep 12.
The aim of the present study was to compare the effect of etidronic acid (HEBP), NaOCl, and EDTA solutions and their combinations on cyclic fatigue resistance of NiTi RPC Blue (RPC Blue), HyFlex EDM (HEDM), and WaveOne Gold (WOG) instruments having different metallurgic characteristics at the body temperature (37 °C). 100 WOG, 100 RPC Blue, and 100 HEDM NiTi files were randomly divided into 5 groups and immersed in the following solutions: group 1, distilled water; group 2, 6% NaOCl; group 3, 17% EDTA; group 4, 18% HEBP; group 5, 6% NaOCl and 18% HEBP. Then the instruments were rotated in an artificial canal until fracture occurred and the number of cycles to fracture was calculated. A univariate analysis of variance and post hoc Tukey tests were then performed for comparisons using SPSS 21.0 software with the significance level set at P < .05. In all the conditions, there was no difference between the cyclic fatigue resistance of WOG and RPC Blue files (P > .05). In the intragroup comparison, WOG, RPC Blue, and HEDM files showed significantly low cyclic fatigue resistance in group 5 compared to other groups (P < .05). Among the groups, there was no statistically significant difference in the fracture lengths (P > .05). EDTA, NaOCl and HEBP solutions did not affect the cyclic fatigue resistance of the tested files when used without combination. However, the combination of NaOCl and HEBP solutions significantly reduced the cyclic fatigue resistance of the tested files.
本研究旨在比较依替膦酸（HEBP）、次氯酸钠（NaOCl）和乙二胺四乙酸（EDTA）溶液及其组合在体温（37°C）下对具有不同金属特性的镍钛 RPC Blue（RPC Blue）、HyFlex EDM（HEDM）和 WaveOne Gold（WOG）器械的循环疲劳阻力的影响。将 100 根 WOG、100 根 RPC Blue 和 100 根 HEDM 镍钛锉随机分为 5 组，分别浸泡在以下溶液中：第 1 组，蒸馏水；第 2 组，6% NaOCl；第 3 组，17% EDTA；第 4 组，18% HEBP；第 5 组，6% NaOCl 和 18% HEBP。然后，器械在人工根管中旋转直至断裂，并计算断裂的循环次数。使用 SPSS 21.0 软件进行单因素方差分析和事后 Tukey 检验，并设置 P<0.05 为显著性水平。在所有条件下，WOG 和 RPC Blue 锉的循环疲劳阻力之间没有差异（P>0.05）。在组内比较中，与其他组相比，WOG、RPC Blue 和 HEDM 锉在第 5 组的循环疲劳阻力明显较低（P<0.05）。在各组之间，断裂长度无统计学差异（P>0.05）。EDTA、NaOCl 和 HEBP 溶液单独使用时不会影响测试文件的循环疲劳阻力。然而，NaOCl 和 HEBP 溶液的组合显著降低了测试文件的循环疲劳阻力。
