Amine Meriem, Merdma Wiam, El Boussiri Khalid
Fixed Prosthodontics Department, Faculty of Dentistry of Casablanca, Hassan II University of Casablanca, Casablanca, Morocco.
Faculty of Dentistry of Casablanca, Hassan II University of Casablanca, Casablanca, Morocco.
Int J Dent. 2022 Aug 5;2022:4575416. doi: 10.1155/2022/4575416. eCollection 2022.
The objective of this work is to study galvanic corrosion of different couples of prosthetic and implant alloys through the realization of a systematic review.
An electronic search was performed on Pubmed, Google Scholar, Scopus, ScienceDirect, EbscoHost, and Web of Science for published studies related to electrogalvanism in oral implantology. The keywords used were "dental implants" and "galvanic corrosion." Two independent readers read the scientific articles.
From 65 articles initially identified, only 19 articles met the eligibility criteria. The evaluation of the selected articles allowed us to determine the parameters compared, such as the resistance to galvanic corrosion, the influence of fluorine and pH on the electrochemical behavior, and the release of metal ions and their cytotoxicity. Indeed, Ti6Al4V and precious alloys coupled to titanium were found to be the most resistant to galvanic corrosion, followed by cobalt-chromium alloys and nickel-chromium alloys which were least resistant. This resistance decreases with increasing fluorine concentration and with decreasing pH of the environment. . The implant-prosthetic system's galvanic resistance is influenced by many intrinsic factors: alloy composition and surface condition, as well as extrinsic factors such as pH variations and amount of fluorine. The effects of oral electrogalvanism are essentially the result of two main criteria: effects due to electric currents generated by corrosion and effects due to the release of metal ions by corrosion.
To avoid this phenomenon, it is wise to follow the proposed recommendations such as the use of the minimum of distinct metals as much as possible, favoring the commercially pure titanium implant of Ti6Al4V, opting for the choice of couples, titanium/titanium, favoring daily mouthwashes of 227 ppm of fluoride, and avoiding fluorinated acid solutions.
本研究旨在通过系统评价，研究不同组合的修复合金与种植合金之间的电偶腐蚀。
在PubMed、谷歌学术、Scopus、ScienceDirect、EBSCOhost和科学网等数据库中进行电子检索，查找与口腔种植学中电偶现象相关的已发表研究。使用的关键词为“牙种植体”和“电偶腐蚀”。两名独立的读者阅读了这些科学文章。
在最初识别出的65篇文章中，只有19篇符合纳入标准。对所选文章的评估使我们能够确定所比较的参数，如电偶腐蚀抗性、氟和pH对电化学行为的影响，以及金属离子的释放及其细胞毒性。事实上，发现Ti6Al4V合金以及与钛耦合的贵金属合金对电偶腐蚀的抗性最强，其次是钴铬合金和镍铬合金，它们的抗性最弱。这种抗性会随着氟浓度的增加和环境pH值的降低而降低。种植-修复系统的电偶电阻受许多内在因素影响：合金成分和表面状况，以及外在因素，如pH值变化和氟含量。口腔电偶现象的影响主要源于两个主要标准：腐蚀产生的电流效应和腐蚀释放金属离子的效应。
为避免这种现象，明智的做法是遵循所提出的建议，例如尽可能少使用不同的金属，优先选择商业纯钛种植体或Ti6Al4V合金，选择钛/钛组合，优先使用含227 ppm氟化物的日常漱口水，并避免使用含氟酸性溶液。
