Martins Jorge N R, Silva Emmanuel J N L, Marques Duarte, Pereira Mário Rito, Vieira Victor T L, Arantes-Oliveira Sofia, Martins Rui F, Braz Fernandes Francisco, Versiani Marco
Faculdade de Medicina Dentária, Universidade de Lisboa, 1600-277 Lisboa, Portugal.
Grupo de Investigação em Bioquimica e Biologia Oral, Unidade de Investigação em Ciências Orais e Biomédicas (UICOB), 1600-277 Lisboa, Portugal.
Materials (Basel). 2022 Jan 28;15(3):1009. doi: 10.3390/ma15031009.
The current study aimed to compare the F1 endodontic instruments from five different heat-treated rotary systems regarding their design, metallurgical properties, and mechanical performance. Five F1 root canal shaping instruments (ProTaper Gold [PTG], Premium Taper Gold, Go-Taper Flex, EdgeTaper Platinum, and Super Files Blue)-plus, a conventional ProTaper Universal (PTU)-which were evaluated regarding their design, nickel/titanium ratio, phase transformation temperatures, microhardness, cyclic fatigue, and torsional and bending strengths. Mood's median test was used for the statistical comparison with a significance set at 5%. The instruments were similar regarding the nickel/titanium ratio and overall design. Go-Taper Flex had the closest transformation temperatures to PTG. PTU and Go-Taper Flex had the highest microhardness (408.3 and 410.5 HVN). The time to fracture of Super Files Blue was three and seven times higher than PTG and PTU, respectively. No difference was observed in the maximum torque to fracture among PTG (1.30 N·cm) and the other systems, except for the Premium Taper Gold (1.05 N·cm) and Go-Taper Flex (1.10 N·cm). Significantly lower bending loads than PTG (269.2 gf) were observed for the EdgeTaper Platinum (158.3 gf) and Premium Taper Gold (103.5 gf) instruments. Super Files Blue outperformed PTG in the cyclic fatigue test, while EdgeTaper Platinum and Premium Taper Gold were more flexible. Premium Taper Gold and Go-Taper Flex showed lower torsional strength.
本研究旨在比较五种不同热处理旋转系统的F1根管器械在设计、冶金性能和机械性能方面的差异。对五种F1根管预备器械（ProTaper Gold [PTG]、Premium Taper Gold、Go-Taper Flex、EdgeTaper Platinum和Super Files Blue）以及一种传统的ProTaper Universal（PTU）进行了设计、镍/钛比例、相变温度、显微硬度、循环疲劳以及扭转和弯曲强度等方面的评估。采用Mood中位数检验进行统计学比较，显著性水平设定为5%。这些器械在镍/钛比例和整体设计方面相似。Go-Taper Flex的相变温度与PTG最为接近。PTU和Go-Taper Flex的显微硬度最高（分别为408.3和410.5 HVN）。Super Files Blue的断裂时间分别比PTG和PTU高出三倍和七倍。除了Premium Taper Gold（1.05 N·cm）和Go-Taper Flex（1.10 N·cm）外，PTG（1.30 N·cm）与其他系统在最大断裂扭矩方面未观察到差异。EdgeTaper Platinum（158.3 gf）和Premium Taper Gold（103.5 gf）器械的弯曲载荷明显低于PTG（269.2 gf）。Super Files Blue在循环疲劳测试中表现优于PTG，而EdgeTaper Platinum和Premium Taper Gold更具柔韧性。Premium Taper Gold和Go-Taper Flex的扭转强度较低。
