Zoghbi André El, Klein Lorena, Frateur Isabelle
62 bis, boulevard du Maréchal Joffre, 92340 Bourg-la-Reine, France.
Orthod Fr. 2013 Dec;84(4):367-81. doi: 10.1051/orthodfr/2013063. Epub 2013 Nov 27.
The objective of this paper is to study the corrosion resistance of orthodontic wires made of different alloys (stainless steel, chrome-cobalt, nickel-titanium and β-titanium) and for the same alloy from different vendors (GAC(®), RMO(®), 3M(®) and ORMCO(®)). Different electrochemical techniques (corrosion potential monitoring as a function of immersion time, current-potential curves, electrochemical impedance spectroscopy (EIS)) were used. The wires' resistance to corrosion was measured and compared with the surface condition, assessed by scanning electron microscopy (SEM). Using the recorded data, a rating system based on the corrosion resistance of orthodontic wires was developed. The comparison of these data with the results of SEM shows that the surface chemical composition plays a primary role in the electrochemical behavior of the orthodontic wires and, unlike surface defects, is a key parameter for the corrosion resistance of the alloy.
本文的目的是研究由不同合金（不锈钢、铬钴合金、镍钛合金和β钛合金）制成的正畸丝以及来自不同供应商（GAC(®)、RMO(®)、3M(®)和ORMCO(®)）的同一合金的正畸丝的耐腐蚀性。使用了不同的电化学技术（作为浸泡时间函数的腐蚀电位监测、电流-电位曲线、电化学阻抗谱（EIS））。测量了正畸丝的耐腐蚀性能，并与通过扫描电子显微镜（SEM）评估的表面状况进行比较。利用记录的数据，开发了一种基于正畸丝耐腐蚀性的评级系统。将这些数据与SEM结果进行比较表明，表面化学成分在正畸丝的电化学行为中起主要作用，并且与表面缺陷不同，是合金耐腐蚀性的关键参数。
