5 种不同单丝往复锉在体外和实验室研究中的机械性能和冶金特性比较。
Mechanical Performance and Metallurgical Characteristics of 5 Different Single-file Reciprocating Instruments: A Comparative In Vitro and Laboratory Study.
机构信息
Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, Rome, Italy.
Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, Rome, Italy.
出版信息
J Endod. 2022 Aug;48(8):1073-1080. doi: 10.1016/j.joen.2022.05.009. Epub 2022 Jun 3.
INTRODUCTION
Because there are no data regarding an instrument recently introduced on the market (OneRECI; Coltene MicroMega, Besançon, France), the aim of this study was to assess its mechanical and metallurgical properties comparing them with the following widespread reciprocating instruments: Reciproc (VDW, Munich, Germany), Reciproc Blue (VDW), EdgeOne Fire (EdgeEndo, Albuquerque, NM), and WaveOne Gold (Dentsply Maillefer, Ballaigues, Switzerland).
METHODS
A total of 65 nickel-titanium files from 5 different reciprocating systems (OneRECI, Reciproc, Reciproc Blue, EdgeOne Fire, and WaveOne Gold) were evaluated throughout a combined mechanical and metallurgical method. Mechanical performances of the selected file were examined by subjecting each specimen to cyclic fatigue and torsional and bending resistance tests, whereas their metallurgical properties were assessed by analyzing the nickel-titanium alloy composition and the phase transformation temperatures through energy-dispersive X-ray spectroscopy and differential scanning calorimetry, respectively. One-way analysis of variance and the post hoc Tukey test were performed with the significance level set to a 95% confidence level.
RESULTS
Energy-dispersive X-ray spectroscopy showed a similar alloy composition for all of the tested files, with a nickel percentage of about 52%-53% and a corresponding percentage of titanium of 47%-48%, whereas the differential scanning calorimetry analysis, although it indicated martensitic characteristics for all files, showed differences in terms of phase transformation temperatures. Overall, OneRECI showed the best mechanical performances in terms of cyclic fatigue and torsional resistance (32.95 ± 2.33 seconds and 0.76 ± 0.03 Ncm, respectively) and flexibility (48.4 ± 4.1 g), with statistically significant differences for all tests (P < .05). The Reciproc files showed the worst flexibility and cyclic fatigue resistance (157.2 ± 8.3 g and 9.27 ± 1.18 seconds, respectively), whereas the EdgeOne Fire showed the lowest torsional resistance (0.39 ± 0.12 Ncm), with statistically significant differences (P < .05).
CONCLUSIONS
Within the limitations of this study, the recently introduced OneRECI file showed the best mechanical performance in comparison to the tested instruments, with an equiatomic composition of the nickel-titanium alloy and a martensitic behavior.
简介
由于市场上最近推出的一种器械（OneRECI；Coltene MicroMega，Besançon，法国）没有相关数据，本研究旨在通过比较以下广泛使用的往复式器械来评估其机械和冶金性能：Reciproc（VDW，慕尼黑，德国）、Reciproc Blue（VDW）、EdgeOne Fire（EdgeEndo，阿尔伯克基，新墨西哥州）和 WaveOne Gold（Dentsply Maillefer，Ballaigues，瑞士）。
方法
通过综合机械和冶金方法评估了来自 5 种不同往复式系统（OneRECI、Reciproc、Reciproc Blue、EdgeOne Fire 和 WaveOne Gold）的 65 个镍钛锉。通过对每个样本进行循环疲劳、扭转和弯曲阻力测试，评估所选锉的机械性能，而通过能量色散 X 射线光谱法分析镍钛合金成分和通过差示扫描量热法分析相变温度，评估其冶金性能。使用单向方差分析和事后 Tukey 检验，置信水平设为 95%。
结果
能量色散 X 射线光谱法显示所有测试锉的合金成分相似，镍含量约为 52%-53%，钛含量相应为 47%-48%，而差示扫描量热法分析虽然显示所有锉均具有马氏体特征，但在相变温度方面存在差异。总体而言，OneRECI 在循环疲劳和扭转阻力（分别为 32.95±2.33 秒和 0.76±0.03 Ncm）和柔韧性（48.4±4.1 g）方面表现出最佳的机械性能，所有测试均具有统计学显著差异（P<.05）。Reciproc 锉表现出最差的柔韧性和循环疲劳阻力（157.2±8.3 g 和 9.27±1.18 秒），而 EdgeOne Fire 表现出最低的扭转阻力（0.39±0.12 Ncm），具有统计学显著差异（P<.05）。
结论
在本研究的限制范围内，与测试器械相比，最近推出的 OneRECI 锉显示出最佳的机械性能，具有镍钛合金的等原子组成和马氏体行为。
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