磁性附着体衔铁的耐腐蚀性研究

Corrosion resistance of magnetic attachment keepers

背景:磁性附着体的衔铁长期暴露于口腔复杂的环境中易受各种因素的影响而发生缓慢腐蚀。目的:就衔铁耐腐蚀性能研究方法及影响因素的研究进展作一综述。方法:由第一作者检索Ovid、Science Direct数据库2001-01/2011-12及中国期刊网全文数据库2003-01/2011-12有关磁性附着体及衔铁耐腐蚀性、牙科金属耐腐蚀性的文章,英文检索词为"magnetic attachment或keeper或dentalmetal"and"corrosion或anticorrosion",中文检索词为"磁性附着体,衔铁,牙科合金,腐蚀"。排除重复性研究及Meta分析,共保留30篇文献进行综述。结果与结论:腐蚀电化学实验及表面形貌研究是是目前普遍的研究方法,腐蚀凝胶法作为一种新的简便易行的检测方法,可用于横向比较研究,微电极技术及Kelvin探针技术不失为一种研究细微局部腐蚀情况的新方法。衔铁应用形式、衔铁本身的合金成分及衔接的根帽合金种类、制作加工工艺、是否加有防护涂层以及患者的口腔情况等都会影响衔铁在口腔内的腐蚀情况。但是目前针对衔铁耐腐蚀性的研究还比较欠缺,主要着重于衔铁本身,而对衔铁根帽等复合结构耐腐蚀性影响的研究还是一片空白,需进一步研究探索。

BACKGROUND：After long-term exposure to oral complex environments,magnetic attachment keepers may corrode slowly,affected by various factors.OBJECTIVE：To review the research methods and influencing factors related to corrosion resistance of magnetic attachment keepers.METHODS：The first author retrieved Ovid,ScienceDirect （2001-01/2011-12） and CNKI （2003-01/2011-12） for articles addressing magnetic attachment,keeper corrosion resistance and corrosion resistance of dental metals.The Keywords were ＂magnetic attachment or keeper or dental metal,corrosion or anticorrosion＂ and ＂magnetic attachment,keeper,dental alloy,corrosion＂ in English and Chinese,respectively.Repetitive studies and Meta analysis were excluded,and finally 30 articles were included. RESULTS AND CONCLUSION：Corrosion electrochemical experiments and the surface morphology are common research methods,and corrosion-gel method can be used as a new user-friendly detection method for horizontal comparative study.The microelectrode technique and the Kelvin probe technology many after all be accepted as a new method of minor localized corrosion.Application forms,the alloy composition of the root cap and keeper itself,production process,whether to add a protective coating as well as the patient＇s oral condition can affect the corrosion of the keeper in the oral cavity.However,the current studies are just focused on the keeper itself,and no research pays attention to the corrosion resistance of the composite structure of the keeper-root-cap that should be more explored.