Comparative evaluation of mechanical properties and shaping performance of heat-treated nickel titanium rotary instruments used in the single-length technique
Comparative evaluation of mechanical properties and shaping performance of heat-treated nickel titanium rotary instruments used in the single-length technique
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DOI：
10.4012/dmj.2020-255
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发表时间：
2021-06-01
影响因子：
2.5
通讯作者：
Okiji, Takashi
中科院分区：
文献类型：
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作者：
Nakatsukasa, Taro;Ebihara, Arata;Okiji, Takashi
本研究旨在评价用于单长度技术的当代热处理镍钛（NiTi）旋转工具[ProTaper Next（PTN）、HyFlex EDM（EDM）和JIZAI（JZ）]的机械性能。评价了三种手术工具和一种几何结构与JZ（nJZ）相同的未经热处理的实验性NiTi手术工具的弯曲载荷、循环疲劳抗力、扭矩/力值和髓腔居中比。与nJZ和PTN相比，EDM和JZ表现出显著更低的弯曲载荷和更多的失效循环（p
This study aimed to evaluate the mechanical properties of contemporary heat-treated nickel-titanium (NiTi) rotary instruments used in the single-length technique [ProTaper Next (PTN), HyFlex EDM (EDM), and JIZAI (JZ)]. Bending loads, cyclic fatigue resistance, torque/force values and canal-centering ratios were evaluated for the three instruments and a non-heat-treated experimental NiTi instrument with the same geometry as JZ (nJZ). EDM and JZ exhibited significantly lower bending load and more cycles to failure compared with nJZ and PTN (p