Ventura G, Lagorio L, Giuria R, Bandelloni R, Andrei E
Istituto di Clinica Odontoiatrica, Università degli Studi, Genova.
Minerva Stomatol. 1995 Jun;44(6):273-83.
Scanning electron microscope (SEM) connected with X-ray microanalysis (EDX) was used to study surface alterations of gold-coated brass dental pins (Dentatus), taken out after some years from restored teeth due to necessity for repeating a restorative therapy. The study method led to establish that: --the gold coating of the base material, constituted of copper alloy, absolutely insufficient to prevent corrosion attack; --the observed morphological alterations are the consequence of a localized corrosion attack, produced by anaerobic bacteria, which origin is confirmed by the presence of S on the most attacked points; --finally the corrosive phenomenon does not cause a periapical pathology, but the process is contrary, or rather, it is the pathology that leads to the favourable conditions to create corrosion.
采用与X射线微分析（能谱仪）相连的扫描电子显微镜（SEM），研究了因重复进行修复治疗而从修复牙齿中取出的镀金黄铜牙钉（Dentatus）数年之后的表面变化。该研究方法得出以下结论：——由铜合金构成的基材表面的金涂层，绝对不足以防止腐蚀侵蚀；——观察到的形态变化是由厌氧菌产生的局部腐蚀侵蚀的结果，最受侵蚀点上存在硫证实了其来源；——最后，腐蚀现象不会引起根尖周病变，而是相反，是病变导致了产生腐蚀的有利条件。
