两种往复式镍钛引导锉的循环抗疲劳性能及弯曲性能比较
Comparison of cyclic fatigue resistance and bending properties of two reciprocating nickel-titanium glide path files.
作者信息
Özyürek T, Uslu G, Gündoğar M, Yılmaz K, Grande N M, Plotino G
机构信息
Department of Endodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
Private Practice, Dental Clinic, Çanakkale, Turkey.
出版信息
Int Endod J. 2018 Sep;51(9):1047-1052. doi: 10.1111/iej.12911. Epub 2018 Mar 13.
AIM
To compare the cyclic fatigue resistance and bending properties of R-Pilot and WaveOne Gold (WOG) Glider files, at intracanal temperature (35°C).
METHODOLOGY
Forty R-Pilot and 40 WOG Glider files were subjected to a cyclic fatigue resistance test (n = 20), calculating the time to fracture (TTF) in an artificial stainless steel canal. The length of the fractured file tips (FL) was also measured. The fracture surface of fragments was examined with a scanning electron microscope, and the cross-sectional area of the fractured surfaces was measured. Flexibility of the tested files (n = 20) was determined using 45° bending test. Data were analysed statistically using the Mann-Whitney U-test at 5% significance level.
RESULTS
Time to fracture was significantly higher in the R-Pilot group compared to the WOG Glider (P < 0.05). There was no significant difference between groups for fracture length. The bending resistance of R-Pilot files was significantly greater than WOG Glider files (P < 0.05).
CONCLUSIONS
A significant greater cyclic fatigue resistance was observed for R-Pilot files compared to WOG Glider instruments, although the bending resistance of WOG Glider files was lower.
目的
比较R-Pilot和WaveOne Gold（WOG）根管锉在根管内温度（35°C）下的抗循环疲劳性能和弯曲性能。
方法
对40根R-Pilot根管锉和40根WOG根管锉进行抗循环疲劳试验（n = 20），计算在人工不锈钢根管中折断的时间（TTF）。还测量了折断锉尖的长度（FL）。用扫描电子显微镜检查碎片的断裂表面，并测量断裂表面的横截面积。使用45°弯曲试验确定受试根管锉（n = 20）的柔韧性。数据采用Mann-Whitney U检验进行统计学分析，显著性水平为5%。
结果
与WOG根管锉相比，R-Pilot组的折断时间显著更长（P < 0.05）。两组之间的折断长度无显著差异。R-Pilot根管锉的抗弯曲能力显著大于WOG根管锉（P < 0.05）。
结论
与WOG根管器械相比，R-Pilot根管锉的抗循环疲劳能力显著更强，尽管WOG根管锉的抗弯曲能力较低。
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