Cyclic fatigue resistance of ProTaper Next nickel-titanium rotary files
Cyclic fatigue resistance of ProTaper Next nickel-titanium rotary files
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DOI：
10.1111/iej.12244
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发表时间：
2014-11-01
影响因子：
5
通讯作者：
Elnaghy, A. M.
中科院分区：
文献类型：
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作者：
Elnaghy, A. M.
目的比较ProTaper Next锉的循环疲劳抗力（PTN; Dentsply Maillefer，Ballaigues，Switzerland）with Twisted Files（TF; SybronEndo，橙子，CA，USA），HyFlex CM（HF; ColteneEndo/Whaledent，Inc，凯霍加瀑布，OH，USA）和ProTaper Universal（PT;方法将PTN X2、TF、HF的25号.06锥度和PT F1的20号.07锥度在模拟根管内旋转直至失效，并记录失效循环次数（NCF）以评价其循环疲劳抗力。扫描电子显微镜被用来表征断裂文件的断裂表面的形貌特征。使用单因素方差分析和Tukey事后检验对NCF和片段长度值的数据进行统计学分析。统计学显著性水平设定为PHF>PT。所有品牌的骨折横截面显示出相似的断口特征，包括裂纹起源，疲劳区和过载快速fracture zone.ConclusionsThe新的ProTaper下有更大的抗循环疲劳相比，ProTaper和HyFlex CM，但不是扭曲文件。
AimTo compare the cyclic fatigue resistance of ProTaper Next files (PTN; Dentsply Maillefer, Ballaigues, Switzerland) with Twisted Files (TF; SybronEndo, Orange, CA, USA), HyFlex CM (HF; ColteneEndo/Whaledent, Inc, Cuyahoga Falls, OH, USA) and ProTaper Universal (PT; Dentsply Maillefer).MethodologySize 25, .06 taper for PTN X2, TF, HF and PT F1 size 20, .07 taper were rotated in simulated canals until failure, and the number of cycles to failure (NCF) was recorded to evaluate their cyclic fatigue resistance. A scanning electron microscope was used to characterize the topographic features of the fracture surfaces of broken files. The data of the NCF and fragment length values were analysed statistically using one-way analysis of variance and Tukey post hoc tests. Statistical significance level was set at PHF>PT. The fracture cross-sections of all brands revealed similar fractographic features, including crack origins, fatigue zone and an overload fast fracture zone.ConclusionsThe new ProTaper Next had greater resistance to cyclic fatigue compared with ProTaper and HyFlex CM but not the Twisted Files.