Dias Pedro de Souza, Kato Augusto Shoji, Bueno Carlos Eduardo da Silveira, Vivan Rodrigo Ricci, Duarte Marco Antonio Hungaro, Calefi Pedro Henrique Souza, Pelegrine Rina Andréa
Department of Endodontics, Faculdade São Leopoldo Mandic, Campinas, SP, Brazil.
Department of Endodontics, Universidade de São Paulo (USP), Bauru, SP, Brazil.
Restor Dent Endod. 2022 Dec 8;48(1):e4. doi: 10.5395/rde.2023.48.e4. eCollection 2023 Feb.
This study aimed to compare the torsional and cyclic fatigue resistance of ProGlider (PG), WaveOne Gold Glider (WGG), and TruNatomy Glider (TNG).
A total of 15 instruments of each glide path system ( = 15) were used for each test. A custom-made device simulating an angle of 90° and a radius of 5 millimeters was used to assess cyclic fatigue resistance, with calculation of number of cycles to failure. Torsional fatigue resistance was assessed by maximum torque and angle of rotation. Fractured instruments were examined by scanning electron microscopy (SEM). Data were analyzed with Shapiro-Wilk and Kruskal-Wallis tests, and the significance level was set at 5%.
The WGG group showed greater cyclic fatigue resistance than the PG and TNG groups ( < 0.05). In the torsional fatigue test, the TNG group showed a higher angle of rotation, followed by the PG and WGG groups ( < 0.05). The TNG group was superior to the PG group in torsional resistance ( < 0.05). SEM analysis revealed ductile morphology, typical of the 2 fracture modes: cyclic fatigue and torsional fatigue.
Reciprocating WGG instruments showed greater cyclic fatigue resistance, while TNG instruments were better in torsional fatigue resistance. The significance of these findings lies in the identification of the instruments' clinical applicability to guide the choice of the most appropriate instrument and enable the clinician to provide a more predictable glide path preparation.
本研究旨在比较ProGlider（PG）、WaveOne Gold Glider（WGG）和TruNatomy Glider（TNG）的抗扭转和循环疲劳性能。
每个滑行路径系统共使用15支器械（n = 15）进行每项测试。使用定制装置模拟90°角和5毫米半径来评估循环疲劳性能，并计算失效循环次数。通过最大扭矩和旋转角度评估抗扭转疲劳性能。对断裂的器械进行扫描电子显微镜（SEM）检查。数据采用Shapiro-Wilk和Kruskal-Wallis检验进行分析，显著性水平设定为5%。
WGG组的循环疲劳抗性高于PG组和TNG组（P < 0.05）。在抗扭转疲劳测试中，TNG组的旋转角度更高，其次是PG组和WGG组（P < 0.05）。TNG组在抗扭转性能方面优于PG组（P < 0.05）。SEM分析显示出韧性形态，这是两种断裂模式（循环疲劳和扭转疲劳）的典型特征。
往复式WGG器械表现出更强的循环疲劳抗性，而TNG器械在抗扭转疲劳方面表现更佳。这些发现的意义在于确定器械的临床适用性，以指导选择最合适的器械，并使临床医生能够提供更可预测的滑行路径预备。
