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Effect of some mouthwashes on the corrosion and tribocorrosion behavior of a Co-Cr dental casting alloy

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Resumo:Co-Cr alloys are widely used fabrication of removable partial dentures (RPDs), particularly as a dental framework. These alloys replaced noble metal alloys, due to better mechanical properties, corrosion resistance and lower cost. The oral cavity is a complex environment that frequently changes in response to the intake of food, beverages, and drugs. The use of mouthwashes is known as an effective method of preventing dental caries. Several studies have been carried out on the electrochemical corrosion and metallic ion releasing on titanium, titanium alloys, and Co-Cr alloys. However, studies related to the effect of mouthwash on electrochemical behavior of Co-Cr alloys are still limited. Even a wash with a mouthwash tooks approximately 30 seconds, the mouthwash is kept in the mouth during more time. Thus, the micromovements between the framework and the teeth or even some particles of food in contact with the framework can lead to wear. So, it is important to study the tribocorrosion behavior due to the combined action between the wear and corrosion with the presence of mouthwashes. Four different commercial mouthwashes were chosen and artificial saliva was used as control group in order to investigate the corrosion and tribocorrosion behavior of Co-Cr dental alloy. Results showed that there was no significant influence of the mouthwashes on the corrosion behavior of the Co-Cr dental alloy. However the tribocorrosion behavior of Co-Cr alloy in mouthwash containing solutions presented both higher open circuit potential values and lower coefficient of friction. Thus, it can be stated that the presence of mouthwashes did not affect negatively the tribocorrosion behavior of Co-Cr dental alloy.
Autores principais:Pontes, Joana Rute Maio
Assunto:Co-Cr dental alloy Mouthwash Corrosion Tribocorrosion Elixires Dentários Corrosão Tribocorrosão
Ano:2014
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:português
Origem:RepositóriUM - Universidade do Minho

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