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两种不同热处理（FireWire™ 和 Gold）的类似根管旋转器械的力学性能和冶金特性。

Mechanical properties and metallurgical features of two similar endodontic rotary instruments with different heat treatments (FireWire™ and Gold).

机构信息

Department of Oral and Maxillo-Facial Sciences, 9311Sapienza University of Rome, via Caserta 6, 00161 Rome, Italy.

Department of Chemical Engineering, Materials, Environment DICMA, 9311La Sapienza University of Rome, via Scarpa, 00161 Rome, Italy.

出版信息

Sci Prog. 2022 Apr-Jun;105(2):368504221103763. doi: 10.1177/00368504221103763.

DOI:10.1177/00368504221103763
PMID:35656775
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10364944/
Abstract

The aim of this study was to explain the mechanical differences between EdgeTaper Platinum (ETP) and ProTaper Gold (PTG) determining the transition temperatures and the composition of the alloy of ETP, since no data are present in literature. A total of 130 instruments were selected: 65 ETP F2 and 65 PTG F2. 20 instruments per type were submitted to each mechanical tests. The cyclic fatigue and torsional tests were performed at a pre-set temperature of 35 °C ± 1 °C. During the cyclic fatigue test, Time to fracture, number of cycles to fracture (NCF) and the fragment length (FL) were recorded. During the static torsional, Torque to Fracture (TtF) and FL were recorded. The fracture surface of 5 randomly selected fragments from each test was examined through a Scanning Electron Microscopy (SEM) and an EDX analysis was performed. 20 instruments per type were submitted to a bending test The force generated (grams) to bend each was recorded. Recorded data of mechanical and metallurgical tests were statistically analyzed using a one-way analysis of variance (ANOVA) test with significance set to a 95% confidence level. ETP F2 showed a higher cyclic fatigue resistance and bending ability than PTG F2, with a statistically significant difference (p < 0.05). PTG showed a higher torsional resistance with a statistically significant difference (p < 0.05). DSC analysis of 5 samples for each instrument type pointed out that the austenite finish temperature of PTG was higher than the ETP, respectively of 49.99 ± 3.31 (°C) and 38.92 ± 1.75 (°C). EDX analysis confirmed the near-equiatomic composition of the Ni-Ti alloys, with a presence of a third component recognized as rubidium in the ETP samples. ETP showed higher flexibility in comparison with PTG, despite the latter is characterized by a more martensitic characterization. since its Af temperature is higher than the ETP.

摘要

本研究旨在解释 EdgeTaper Platinum（ETP）和 ProTaper Gold（PTG）之间的机械差异，确定 ETP 的相变温度和合金成分，因为目前文献中尚无相关数据。共选择了 130 根器械：65 根 ETP F2 和 65 根 PTG F2。每种类型的器械各进行 20 次机械测试。循环疲劳和扭转测试在设定温度为 35°C±1°C 下进行。在循环疲劳测试中，记录断裂时间、断裂循环次数（NCF）和片段长度（FL）。在静态扭转测试中，记录断裂扭矩（TtF）和 FL。从每个测试中随机选择 5 个片段的断裂表面，通过扫描电子显微镜（SEM）进行检查，并进行 EDX 分析。每种类型的器械各进行 20 次弯曲测试，记录弯曲时产生的力（克）。使用单向方差分析（ANOVA）对机械和冶金测试的记录数据进行统计分析，置信水平为 95%。与 PTG F2 相比，ETP F2 具有更高的循环疲劳阻力和弯曲能力，差异具有统计学意义（p<0.05）。PTG 表现出更高的扭转阻力，差异具有统计学意义（p<0.05）。对每种器械类型的 5 个样本进行 DSC 分析表明，PTG 的奥氏体终了温度高于 ETP，分别为 49.99±3.31（°C）和 38.92±1.75（°C）。EDX 分析证实了 Ni-Ti 合金的近等原子组成，在 ETP 样品中发现了一种被确认为铷的第三元素。与 PTG 相比，ETP 表现出更高的柔韧性，尽管后者的马氏体特征更明显，因为其 Af 温度高于 ETP。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/0c7a6112a472/10.1177_00368504221103763-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/79faa52421f8/10.1177_00368504221103763-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/d34fb036c28b/10.1177_00368504221103763-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/43a47519550e/10.1177_00368504221103763-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/9dd95171aeb1/10.1177_00368504221103763-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/d155de366ac0/10.1177_00368504221103763-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/39e37d9d2f72/10.1177_00368504221103763-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/0c7a6112a472/10.1177_00368504221103763-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/79faa52421f8/10.1177_00368504221103763-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/d34fb036c28b/10.1177_00368504221103763-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/43a47519550e/10.1177_00368504221103763-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/9dd95171aeb1/10.1177_00368504221103763-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/d155de366ac0/10.1177_00368504221103763-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/39e37d9d2f72/10.1177_00368504221103763-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cba/10364944/0c7a6112a472/10.1177_00368504221103763-fig7.jpg

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