Isolda Costa, Dr. Costa holds a degree in Chemical Engineering from the State University of Campinas (1981), a Masters in Nuclear Technology - Materials from the University of São Paulo (1986) at the Nuclear and Energy Research Institute IPEN and a PhD from the University of Manchester Institute of Science and Technology (UMIST) - Corrosion and Protection Center 1991. She has been involved in corrosion research at IPEN since 1984 and since 1992 has been supervising undergraduate and postgraduate students on this subject. The topics of interest of research are corrosion and protection of metallic materials. She has published over 170 peer-reviewed articles.
Instituto de Pesquisas Energéticas e Nucleares (IPEN)
Metallic alloys are largely used in dentistry for implants, mainly titanium alloys. These alloys present a sole combination of physical, chemical and biological properties making them highly recommended for implants fabrication. Despite their unique combination of properties, failures do occur. Corrosion can be one of the reasons for these failures. This is due to the very extreme conditions encountered in the mouth, such as presence of microbial species, production of organic acids and enzymes, epithelial cells, food debris, pH and temperature variation, ionic corrosive species (chloride, sodium and potassium) and presence of proteins. These conditions make teeth function one of the most inhospitable environments in the body leading to corrosion of the high noble alloys used in dentistry. Corrosion results in surface roughening, liberation of elements from the metal or alloy, toxic and allergic reactions and, eventually, failure of the material. The aim of this lecture is to present an introduction to this important subject, that is, causes and consequences of metallic dental materials corrosion.