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https://hdl.handle.net/1822/25061
Título: | Corrosion behaviour of titanium in the presence of Streptococcus mutans |
Autor(es): | Souza, J. C. M. Ponthiaux, Pierre Henriques, Mariana Oliveira, Rosário Teughels, W. Celis, J. P. Rocha, L. A. |
Palavras-chave: | Streptococcus mutans Biofilm Fluorides Titanium Corrosion |
Data: | 2013 |
Editora: | Elsevier Sci Ltd |
Revista: | Journal of Dentistry |
Citação: | Souza, J.C.M.; Ponthiaux, P.; Henriques, M.; Oliveira, R.; Teughels, W.; Celis, J.-P.; Rocha, Luís Corrosion behaviour of titanium in the presence of Streptococcus mutans Journal of Dentistry 41(6) 528-534, 2013. |
Resumo(s): | Objective The main aim of this in vitro study was to evaluate the influence of Streptococcus mutans on the corrosion of titanium. Methods S. mutans biofilms were formed on commercially pure titanium (CP-Ti) square samples (10 mm × 10 mm × 1 mm) using a culture medium enriched with sucrose. Open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) measurements were used to evaluate the corrosion behaviour of CP-Ti in the presence of S. mutans in Fusayama's artificial saliva. The corrosion of biofilm-free CP-Ti samples was also evaluated in artificial saliva. Biofilms biomass was measured by spectrophotometry, using crystal violet staining, after 1, 2 and 7 days. Results The OCP values recorded on CP-Ti in the presence of S. mutans (−0.3 ± 0.02 V vs. SCE) was lower than those on biofilm-free CP-Ti (−0.1 ± 0.01 V vs. SCE) after 2 h of immersion in artificial saliva (p < 0.05). That reveals a high reactivity of titanium in presence of S. mutans. Impedance spectra revealed the formation of a compact passive film on titanium in artificial saliva or in the presence of a 2 days old S. mutans biofilm even though the corrosion resistance of CP-Ti has decreased in presence of a S. mutans biofilm. Conclusion The presence of bacterial colonies, such as S. mutans, negatively affected the corrosion resistance of the titanium. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/25061 |
DOI: | 10.1016/j.jdent.2013.03.008 |
ISSN: | 0300-5712 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series CIICS - Artigos em revistas de circulação internacional com arbitragem científica |