Bueno Carlos Roberto Emerenciano, Cury Marina Tolomei Sandoval, Vasques Ana Maria Veiga, Sivieri-Araújo Gustavo, Jacinto Rogério Castilho, Gomes-Filho João Eduardo, Cintra Luciano Tavares Angelo, Dezan-Júnior Eloi
Universidade Estadual Paulista- UNESP, Araçatuba School of Dentistry, Department of Endodontics, Araçatuba, SP, Brazil.
Braz Oral Res. 2019;33:e028. doi: 10.1590/1807-3107bor-2019.vol33.0028. Epub 2019 Apr 11.
This study aimed to assess the cyclic fatigue resistance of Genius and EdgeFile X1 reciprocating instruments compared with WaveOne Gold Primary. Twenty Genius (Ultradent) 25.04, 20 Genius 30.04, 20 EdgeFile X1 (EdgeEndo) and 20 WaveOne Gold Primary (Dentsply Maillefer) instruments were included in this study and tested in a static cyclic fatigue testing device, which has an artificial stainless steel canal with a 60° angle of curvature and a 5-mm radius of curvature. All instruments were operated in reciprocation mode until fracture occurred. The number of cycles to failure (NCF) was calculated and time to fracture (TF) was recorded in seconds using a digital chronometer. The mean and standard deviations of NCF and TF were calculated for each reciprocating system and the data were subjected to Kruskal-Wallis one-way analysis of variance and to Dunn's test (p < .05) using SigmaPlot software (Systat software, CA, USA). The fractured surfaces of five instruments from each brand were randomly examined and microphotographed by a low-vacuum environmental scanning electron microscopy - SEM (Tabletop Microscope TM3030, Hitachi, Japan) to confirm the cyclic fatigue fracture. EdgeFile exhibited the highest cyclic fatigue resistance, followed by both Genius files (p < .05). Within the limitations of this in vitro study, EdgeFile X1 instruments had significantly higher cyclic fatigue resistance than did Genius and WaveOne Gold Primary instruments. The cyclic fatigue resistance of both Genius files was higher than that of WaveOne Gold Primary.
本研究旨在评估Genius和EdgeFile X1往复式器械与WaveOne Gold Primary相比的循环疲劳抗性。本研究纳入了20支Genius（Ultradent）25.04、20支Genius 30.04、20支EdgeFile X1（EdgeEndo）和20支WaveOne Gold Primary（登士柏迈福）器械，并在静态循环疲劳测试装置中进行测试，该装置有一个曲率为60°、曲率半径为5毫米的人工不锈钢根管。所有器械均以往复模式操作，直至发生折断。计算折断时的循环次数（NCF），并用数字计时器记录折断时间（TF），以秒为单位。计算每个往复系统的NCF和TF的平均值及标准差，并使用SigmaPlot软件（美国加利福尼亚州Systat软件公司）对数据进行Kruskal-Wallis单向方差分析和邓恩检验（p<0.05）。随机检查每个品牌五支器械的折断表面，并用低真空环境扫描电子显微镜-SEM（日本日立的桌面显微镜TM3030）进行显微拍照，以确认循环疲劳折断。EdgeFile表现出最高的循环疲劳抗性，其次是两种Genius锉（p<0.05）。在本体外研究的局限性内，EdgeFile X1器械的循环疲劳抗性显著高于Genius和WaveOne Gold Primary器械。两种Genius锉的循环疲劳抗性均高于WaveOne Gold Primary。
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