Department of Endodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
Samsun Oral and Dental Health, Samsun, Turkey.
J Endod. 2018 Jun;44(6):1033-1037. doi: 10.1016/j.joen.2018.03.004. Epub 2018 Apr 18.
The purpose of this article was to compare the cyclic fatigue resistance of Reciproc and Reciproc Blue files (VDW GmbH, Munich, Germany) that were used to prepare root canals of mandibular molar teeth with or without a glide path.
Sixty Reciproc R25 and 60 Reciproc Blue R25 files were used. The Reciproc and Reciproc Blue groups were divided into 3 subgroups (ie, as received condition, used without a glide path, and used with a glide path). All the instruments were rotated in a stainless steel artificial canal with an inner diameter of 1.5 mm, a 60° angle of curvature, and a radius of curvature of 5 mm until fracture occurred. The number of cycle to fracture was calculated, and the length of the fractured segments was measured. The Kruskal-Wallis test was performed to statistically analyze the data using SPSS 21.0 software (IBM Corp, Armonk, NY) at a 5% significance level.
The cyclic fatigue resistance of as received condition Reciproc Blue files was found to be higher than as received condition Reciproc files (P < .05). Reciproc Blue files used for root canal preparation showed higher cyclic fatigue resistance than Reciproc files used for root canal preparation (P < .05). There was no statistically significant difference between Reciproc and Reciproc Blue files used with a glide path and without a glide path (P > .05). There was no statistically significant difference in the mean length of the fractured fragments of the instruments (P > .05).
Within the limitations of this in vitro study, it was concluded that creating a glide path using ProGlider files had no effect on the cyclic fatigue resistance of RPC and RPC Blue files.
本文的目的是比较 Reciproc 和 Reciproc Blue 锉（VDW GmbH，德国慕尼黑）在预备下颌磨牙根管时有无预弯锉道的抗疲劳循环性能。
共使用 60 根 Reciproc R25 和 60 根 Reciproc Blue R25 锉。将 Reciproc 和 Reciproc Blue 组分为 3 个亚组（即，原始状态、无预弯锉道使用和有预弯锉道使用）。所有器械在不锈钢人工根管内旋转，内直径为 1.5mm，弯曲角度为 60°，弯曲半径为 5mm，直到发生断裂。计算断裂的循环次数，并测量断裂段的长度。使用 SPSS 21.0 软件（IBM Corp，Armonk，NY）的 Kruskal-Wallis 检验对数据进行统计学分析，显著性水平为 5%。
发现原始状态的 Reciproc Blue 锉的抗疲劳循环性能高于原始状态的 Reciproc 锉（P<.05）。预备根管用 Reciproc Blue 锉的抗疲劳循环性能高于预备根管用 Reciproc 锉（P<.05）。有预弯锉道和无预弯锉道的 Reciproc 和 Reciproc Blue 锉之间无统计学差异（P>.05）。器械断裂片段的平均长度无统计学差异（P>.05）。
在本体外研究的限制范围内，使用 ProGlider 锉制作预弯锉道对 Reciproc 和 Reciproc Blue 锉的抗疲劳循环性能没有影响。
