Abstract：
The aim of the present systematic review was to perform a qualitative synthesis of in vitro studies that assess the cyclic fatigue resistance of rotary glide path (GP) files of endodontic applications. Systematic electronic searches were performed in the Medline, Embase, Scopus, SciELO, and Web of Science databases on 15 February 2022, and were last updated on 1 April In vitro studies that evaluated and compared the cyclic fatigue resistance of at least one rotary GP file system with another rotary GP file system were included. A total of 25 studies were included in the qualitative synthesis. All studies assessing the difference in the cyclic fatigue resistance between continuous and reciprocating rotation in rotary glide path files found that the latter resulted in a significantly higher cyclic fatigue resistance, as evidenced by a higher number of cycles until fracture and/or time until fracture. Within the limitations of this review and the in vitro nature of the included studies, the results indicate that the cyclic fatigue resistance of rotary GP files may be influenced by several intrinsic factors of the files, such as their taper, cross-sectional design, alloy properties, kinematics, and external factors, such as the curvature and radius at which the file is activated, the irrigation or lubricant used, and the temperature.
摘要：
本系统综述的目的是对体外研究进行定性综合，以评估牙髓应用的旋转滑行道（GP）文件的循环疲劳抗性。在Medline进行了系统的电子搜索，Embase,Scopus,SciELO,和WebofScience数据库于2022年2月15日更新，最后一次更新于4月1日。包括体外研究，这些研究评估并比较了至少一个旋转GP文件系统与另一个旋转GP文件系统的循环疲劳抗性。共有25项研究被纳入定性综合。所有评估旋转滑翔路径文件中连续旋转和往复旋转之间循环疲劳阻力差异的研究发现，后者导致明显更高的循环疲劳阻力。如更高的循环次数直到断裂和/或直到断裂的时间所证明的。在这篇综述的局限性和所纳入研究的体外性质内，结果表明，旋转GP文件的循环疲劳阻力可能受文件的几个内在因素的影响，比如它们的锥度，横截面设计，合金性能，运动学,和外部因素，例如激活文件的曲率和半径，使用的灌溉或润滑剂，和温度。
