Aminsobhani Mohsen, Meraji Naghmeh, Azizlou Elaheh, Sadri Ehsan
Department of Endodontics, School of Dentistry, AJA University of Medical Sciences, Tehran, Iran.
Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Iran Endod J. 2022 Spring;17(2):57-61. doi: 10.22037/iej.v17i2.35174.
The aim of this study was to examine the cyclic fatigue resistances #16 ProGlider, #15.02 Scout RaCe, #15.03 NeoNiTi GPS, One G and Path-File NiTi glide path files in S-shaped artificial canals.
Twenty files from each group were tested. An artificial groove simulating double (S-shaped) curved canal measuring 1.5 mm in width at the top level decreasing towards the apical reaching 0.3 mm at the tip having a 0.06 taper, 18 mm in length, and 1.5 in depth machined in a stainless steel block was used in this study. Resistance to cyclic fatigue was determined by counting the numbers of cycles to failure (NCF). Furthermore, the fragment length of the fractured tips and angle and radius of curvature formed by each file in each trajectory were evaluated. The data were analyzed using the one-way analysis of variance and Tukey's HSD test and the level of significance was set at 5%.
NeoNiti GPS and Scout RaCe glide path files showed significantly higher NCF values compared to other evaluated glide path files (<0.001) but no significant difference when compared with each other (=0.67).
Based on this study NeoNiti GPS and Scout RaCe glide path files had the highest cyclic fatigue resistance in simulated double (S-shaped) curved artificial canals among the evaluated path finding files. Therefore, it seems that they can be used with more confidence in endodontic treatment of S-shaped canals clinically.
本研究的目的是检测16号ProGlider、15.02号Scout RaCe、15.03号NeoNiTi GPS、One G和Path-File镍钛引导通路锉在S形人工根管中的抗循环疲劳性能。
每组测试20根锉。本研究使用在不锈钢块中加工出的人工凹槽，该凹槽模拟双（S形）弯曲根管，顶部宽度为1.5毫米，向根尖逐渐变窄，尖端为0.3毫米，锥度为0.06，长度为18毫米，深度为1.5毫米。通过计算失效循环次数（NCF）来确定抗循环疲劳性能。此外，还评估了折断尖端的碎片长度以及每个锉在每个轨迹中形成的角度和曲率半径。数据采用单因素方差分析和Tukey's HSD检验进行分析，显著性水平设定为5%。
与其他评估的引导通路锉相比，NeoNiti GPS和Scout RaCe引导通路锉显示出显著更高的NCF值（<0.001），但彼此之间无显著差异（=0.67）。
基于本研究，在评估的根管探查锉中，NeoNiti GPS和Scout RaCe引导通路锉在模拟双（S形）弯曲人工根管中具有最高的抗循环疲劳性能。因此，在临床上对S形根管进行根管治疗时，似乎可以更放心地使用它们。
