Pelsoczi-Kovács István, Kutsán György, Rauscher Adám, Fazekas András
Szegedi Tudományegyetem Altalános Orvostudományi Kar, Fogászati és Szájsebészeti Klinika.
Fogorv Sz. 2005 Dec;98(6):251-5.
The electrochemical behavior of titanium and dental casting alloys in modelling oral conditions With applying dental implants in the oral cavity the direct contact of various metals (titanium and other casting alloys) is unavoidable. Considering the electrolyte characteristic of the saliva, the chances are given that electrochemical processes might occur under such circumstances. The aim of this study was to investigate the electrochemical behavior of titanium and other dental alloys being in direct contact with the oral environment. Nickel-chromium, cobalt-chromium, high palladium content and gold alloys as well as CP grade I titanium cast samples respectively were involved in the study. Test models were made from these metals. As an electrolyte solution (set to pH 4) artificial saliva and 0.9 % NaCl solution were used. The type and the rate of corrosion were assessed with laboratory immersion test and electrochemical polarization method. In case of polarization method a three-electrode measuring-cell was applied. Laboratory exposure tests revealed that titanium resisted corrosion; there was no sign of corrosion at all. The high palladium content alloy and gold alloy behaved similarly. The nickel-chromium and cobalt-chromium alloys showed some signs of corrosion, especially in sites with damaged surface or inhomogeneities on the surface. Results of the laboratory electrochemical experiments correlated with immersion studies graphically illustrated in the paper.
在模拟口腔环境中钛及牙科铸造合金的电化学行为 随着口腔种植体在口腔中的应用，各种金属（钛和其他铸造合金）的直接接触不可避免。考虑到唾液的电解质特性，在这种情况下有可能发生电化学过程。本研究的目的是调查钛和其他牙科合金与口腔环境直接接触时的电化学行为。本研究分别涉及镍铬合金、钴铬合金、高钯含量合金和金合金以及I级纯钛铸造样品。用这些金属制作测试模型。作为电解质溶液（设定pH值为4），使用人工唾液和0.9%氯化钠溶液。通过实验室浸泡试验和电化学极化法评估腐蚀类型和速率。在极化法中，使用三电极测量池。实验室暴露试验表明钛具有抗腐蚀性；完全没有腐蚀迹象。高钯含量合金和金合金表现相似。镍铬合金和钴铬合金显示出一些腐蚀迹象，特别是在表面受损或表面不均匀的部位。实验室电化学实验结果与本文中以图形方式说明的浸泡研究结果相关。
