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镍钛合金对根管锉循环疲劳抗力的影响

The Influence of NiTi Alloy on the Cyclic Fatigue Resistance of Endodontic Files.

作者信息

Ruiz-Sánchez Celia, Faus-Llácer Vicente, Faus-Matoses Ignacio, Zubizarreta-Macho Álvaro, Sauro Salvatore, Faus-Matoses Vicente

机构信息

Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain.

Department of Endodontics, Faculty of Health Sciences, Alfonso X El Sabio University, 28691 Madrid, Spain.

出版信息

J Clin Med. 2020 Nov 21;9(11):3755. doi: 10.3390/jcm9113755.

DOI:10.3390/jcm9113755
PMID:33233442
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7700305/
Abstract

BACKGROUND

The aim of this study was to analyze the influence of NiTi alloy in endodontic rotary instruments on cyclic fatigue resistance.

METHODS

One hundred and sixty-four (164) sterile endodontic rotary files were selected and distributed into the following study groups: A: 25.08 F2 ProTaper Universal (PTU) ( = 41); B: 25.06 X2 ProTaper Next (PTN) ( = 41); C: 25.08 F2 ProTaper Gold (PTG) ( = 41), and D: 25.06 ProFile Vortex Blue (PVB) ( = 41). A cyclic fatigue device was designed to conduct the static cyclic fatigue tests with stainless steel artificial root canals systems with 250 µm apical diameter, 60° curvature angle, 5 mm radius of curvature, 20 mm length, and 6% (25.06) and 8% taper (25.08). Failure of the endodontic rotary instrument was detected by a single operator through direct observation and was also filmed to allow measurement of the exact time to failure. Results were analyzed using the ANOVA test and Weibull statistical analysis.

RESULTS

All pairwise comparisons presented statistically significant differences between the time to failure for the NiTi alloy study groups ( < 0.001), except between the PTN and PVB study groups ( = 0.379). In addition, statistically significant differences between the number of cycles to failure for the NiTi alloy study groups ( < 0.001) were also observed.

CONCLUSIONS

The NiTi CM-Gold wire alloy of the ProTaper Gold endodontic rotary files resulted in greater resistance to cyclic fatigue than ProFile Vortex Blue, ProTaper Next, and ProTaper Universal endodontic rotary files.

摘要

背景

本研究的目的是分析镍钛合金在根管旋转器械中对循环疲劳抗力的影响。

方法

选择164支无菌根管旋转锉，并将其分为以下研究组：A组：25.08 F2 ProTaper Universal（PTU）（n = 41）；B组：25.06 X2 ProTaper Next（PTN）（n = 41）；C组：25.08 F2 ProTaper Gold（PTG）（n = 41）；D组：25.06 ProFile Vortex Blue（PVB）（n = 41）。设计了一种循环疲劳装置，用于对具有250 µm根尖直径、60°弯曲角度、5 mm弯曲半径、20 mm长度以及6%（25.06）和8%锥度（25.08）的不锈钢人工根管系统进行静态循环疲劳试验。由一名操作人员通过直接观察检测根管旋转器械的失效情况，并进行拍摄以测量确切的失效时间。使用方差分析和威布尔统计分析对结果进行分析。

结果

除PTN和PVB研究组之间外（P = 0.379），镍钛合金研究组之间的失效时间所有成对比较均呈现出统计学显著差异（P < 0.001）。此外，还观察到镍钛合金研究组之间的失效循环次数存在统计学显著差异（P < 0.001）。

结论

ProTaper Gold根管旋转锉的镍钛CM - Gold丝合金比ProFile Vortex Blue、ProTaper Next和ProTaper Universal根管旋转锉具有更强的抗循环疲劳能力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/042c/7700305/adeb17ea45c3/jcm-09-03755-g014.jpg
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