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Title: Corrosion behaviour of titanium in the presence of Streptococcus mutans
Authors: Souza, Júlio C M ×
Ponthiaux, P
Henriques, Mariana
Oliveira, Rosário
Teughels, Wim
Celis, Jean-Pierre
Rocha, Luís A #
Issue Date: Jun-2013
Publisher: Elsevier Ltd.
Series Title: Journal of Dentistry vol:41 issue:6 pages:528-534
Article number: S0300-5712(13)00088-2
Abstract: 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 (10mm×10mm×1mm) 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±0.02V vs. SCE) was lower than those on biofilm-free CP-Ti (-0.1±0.01V vs. SCE) after 2h 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.
URI: 
ISSN: 0300-5712
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Periodontology
× corresponding author
# (joint) last author

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