摘要
牙科金属材料在潮湿的口腔中使用时,可与口腔环境中的许多理化组分发生化学反应,产生腐蚀。同时,口腔是一个多菌群的复杂生态环境,其中的微生物会对金属材料的腐蚀产生一定的影响,即发生微生物腐蚀,微生物腐蚀是由微生物生命活动引起或促进材料的腐蚀破坏。口腔环境的温度、唾液的组成和pH值能对微生物腐蚀产生不同的影响。另外,牙科金属材料本身的元素组成、组织结构和加工处理过程的不同也会产生不同的腐蚀过程和结果。微生物虽然参与了金属的腐蚀过程,但微生物并不会改变金属的腐蚀类型,而是它们会改变金属的腐蚀速度,使金属在口腔环境中更容易腐蚀。牙科金属材料的微生物腐蚀是跨学科的综合研究,可以应用材料学、腐蚀学和生物学领域的研究方法,来对口腔微生物对牙科金属的腐蚀作用机制作进一步的研究。
When the dental metallic materials are applied in the aqueous oral environments,the physical and chemical reaction will occur between the dental metallic materials and many physical and chemical composition of oral environment,which will result in corrosion of dental metallic materials.There are many microorganisms which can affect the corrosion behaviors of dental metallic materials in the oral environments.Microbiological influenced corrosion（MIC） of dental metallic materials occurs.Microbiological influenced corrosion is defined as the deterioration of a metal by corrosion processes that occur directly or indirectly as a result of the activity of living microorganisms.The temperature,pH value and richness of saliva will exert different influences on microbiological influenced corrosion of dental metallic materials.In addition,the difference of compositions and structures of dental metallic materials and machining processes also produce different corrosion process and results.Though microorganisms involve in the process of corrosion of dental metallic materials,they do not change the corrosion types.But microorganisms may stimulate or accelerate the corrosion process.Microbiological influenced corrosion of dental metallic materials is a comprehensive study of interdisciplinary.Materials science,corrosion science and bilogy research methods can be applied to study the mechanism of microbiological influenced corrosion of dental metallic materials.
出处
《国际口腔医学杂志》
CAS
2010年第1期89-93,97,共6页
International Journal of Stomatology
基金
上海市科学技术委员会基金资助项目(08DZ2271100)
关键词
牙科金属
微生物
腐蚀
dental metallic materials microorganism corrosion
