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人工唾液改性对Remanium型正畸弓丝点蚀和力学性能的影响

Effect of Artificial Saliva Modification on Pitting Corrosion and Mechanical Properties of the Remanium-Type Orthodontic Archwire.

作者信息

Łosiewicz Bożena, Osak Patrycja, Górka-Kulikowska Karolina, Goryczka Tomasz, Dworak Michał, Maszybrocka Joanna, Aniołek Krzysztof

机构信息

Institute of Materials Engineering, Faculty of Science and Technology, University of Silesia in Katowice, 41-500 Chorzow, Poland.

Department of Biomaterials and Experimental Dentistry, Poznan University of Medical Sciences, 60-812 Poznan, Poland.

出版信息

Materials (Basel). 2023 Oct 20;16(20):6791. doi: 10.3390/ma16206791.

DOI:10.3390/ma16206791
PMID:37895772
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10608180/
Abstract

The pitting corrosion of orthodontic apparatus elements in the oral environment is an interest of both clinicians and scientists dealing with the assessment of the biocompatibility of medical materials. This work presents a study on the effect of ready-to-use Listerine and Meridol mouthwashes and sodium fluoride on the resistance of the commercial Remanium-type orthodontic archwire to pitting corrosion in artificial saliva at 37 °C. XRD, SEM, EDS, mechanical properties, and microhardness measurements were used to characterize the archwire. The in vitro corrosion resistance of the archwire was examined using the open-circuit potential method, electrochemical impedance spectroscopy, and anodic polarization curves. The physicochemical characteristics confirmed the presence of a bi-phase alloy with a mixed austenite/ferrite structure containing Fe 74.4(7) at.%, Cr 18.4(4) at.%, and Ni 7.2(4) at.%. The Fe-Cr-Ni alloy was characterized by high tensile strength and Vickers microhardness. EIS revealed the capacitive behavior with high corrosion resistance. It was found that the kinetics of pitting corrosion in the artificial saliva decreased in the presence of NaF and mouthwashes. The potentiodynamic characteristics confirmed the decrease in susceptibility to pitting corrosion after the modification of artificial saliva. The pitting corrosion mechanism of the self-passive oxide layer on the surface of the Fe-Cr-Ni electrode in the biological environment containing chloride ions was discussed in detail. Mechanical properties after corrosion tests were weakened.

摘要

口腔环境中正畸器械元件的点蚀是临床医生和从事医用材料生物相容性评估的科学家们都感兴趣的问题。这项工作展示了一项关于即用型李施德林漱口水、美利诺漱口水和氟化钠对市售Remanium型正畸弓丝在37℃人工唾液中点蚀抗性影响的研究。使用X射线衍射（XRD）、扫描电子显微镜（SEM）、能谱仪（EDS）、力学性能测试和显微硬度测量来表征弓丝。采用开路电位法、电化学阻抗谱和阳极极化曲线来检测弓丝的体外耐腐蚀性能。物理化学特性证实存在一种具有奥氏体/铁素体混合结构的双相合金，其中铁（Fe）含量为74.4(7)原子百分比，铬（Cr）含量为18.4(4)原子百分比，镍（Ni）含量为7.2(4)原子百分比。该铁 - 铬 - 镍合金具有高拉伸强度和维氏显微硬度。电化学阻抗谱显示其具有高耐腐蚀性的电容行为。研究发现，在氟化钠和漱口水存在的情况下，人工唾液中点蚀腐蚀的动力学降低。动电位特性证实了人工唾液改性后点蚀敏感性的降低。详细讨论了含氯离子生物环境中铁 - 铬 - 镍电极表面自钝化氧化层的点蚀腐蚀机制。腐蚀试验后的力学性能有所减弱。

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