Khandagale Pooja D, Shetty Prashant P, Makandar Saleem D, Bapna Pradeep A, Karobari Mohmed Isaqali, Marya Anand, Messina Pietro, Scardina Giuseppe Alessandro
Department of Conservative Dentistry and Endodontics, Pacific Dental College and Hospital, Udaipur, Rajasthan, India.
Department of Conservative Dentistry and Endodontics, Pacific Dental College, Debari, Udaipur 313024, India.
Int J Dent. 2021 Jul 29;2021:7402658. doi: 10.1155/2021/7402658. eCollection 2021.
The main aims of root canal instrumentation are to provide an environment that will lead to healing and to provide a root canal shape that is comfortable to clean and seal. When working with rotary endodontic instruments, the most significant concerns are that the instrument might fracture in the root canal, thus affecting the treatment outcome. Hence, it is of immense importance to know which file systems have more cyclic fatigue resistance. . This study evaluated the effect of the curved segment length of the artificial canal (the arch), and the number of cycles necessary in fracture of Hyflex EDM, Twisted files, and ProTaper Gold were recorded. Sixty NiTi rotary instruments of 25 mm length (Hyflex EDM (20), Twisted files (20), and ProTaper Gold (20)) were tested in a metal block with simulated canal having 90° angle of curvature. The study was performed with a specific radius and degree of curvature, i.e., 8 mm radius and 90⁰ angle of curvature, and data obtained were subsequently subjected to statistical evaluation using one-way analysis of variance and Tukey's post hoc test.
The Hyflex EDM (774.29) exhibited the maximum cyclic fatigue resistance compared to Twisted files (654.875) and ProTaper Gold (375.575). A statistically significant difference was observed between the tested groups.
The Hyflex EDM files showed the highest cyclic fatigue resistance, followed by Twisted files and ProTaper Gold files.
根管预备的主要目的是营造一个利于愈合的环境，并提供一个便于清洁和封闭的根管形态。使用旋转式牙髓器械时，最主要的担忧是器械可能会在根管内折断，从而影响治疗效果。因此，了解哪种锉系统具有更强的抗循环疲劳能力至关重要。本研究评估了人工根管弯曲段长度（牙弓）的影响，并记录了Hyflex EDM锉、Twisted锉和ProTaper Gold锉折断所需的循环次数。将60根长度为25毫米的镍钛旋转器械（Hyflex EDM锉20根、Twisted锉20根、ProTaper Gold锉20根）在带有模拟90°弯曲角度根管的金属块中进行测试。该研究在特定半径和弯曲度下进行，即半径8毫米和弯曲角度90°，随后使用单因素方差分析和Tukey事后检验对获得的数据进行统计评估。
与Twisted锉（654.875）和ProTaper Gold锉（375.575）相比，Hyflex EDM锉（774.29）表现出最大的抗循环疲劳能力。在测试组之间观察到具有统计学意义的差异。
Hyflex EDM锉显示出最高的抗循环疲劳能力，其次是Twisted锉和ProTaper Gold锉。
