Corrosion behaviour of titanium in the presence of Streptococcus mutans

Júlio C.M. Souza 1, 2 Pierre Ponthiaux 3 Mariana Henriques 4 Rosario Oliveira 4 Wim Teughels 5 Jean-Pierre Celis 5 Luís A. Rocha 4
1 Laboratoie d'Océanographie Spatiale
2 UFP, Sch Hlth Sci FCS, Sch Dent
3 LGPM - Laboratoire de Génie des Procédés et Matériaux - EA 4038
4 University of Minho [Braga]
5 KU Leuven - Katholieke Universiteit Leuven
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 (10 mm x 10 mm x 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. (C) 2013 Elsevier Ltd. All rights reserved.
Keywords : Streptococcus mutans Biofilm Fluorides Titanium Corrosion
Type de document :
Article dans une revue
European Journal Of Esthetic Dentistry, Quintessence Publishing Co, Inc, 2013, 41 (6), pp.528-534. 〈10.1016/j.jdent.2013.03.008〉
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https://hal-centralesupelec.archives-ouvertes.fr/hal-01240415
Contributeur : Catherine Kruch <>
Soumis le : mercredi 9 décembre 2015 - 11:14:36
Dernière modification le : jeudi 5 avril 2018 - 12:30:09

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Júlio C.M. Souza, Pierre Ponthiaux, Mariana Henriques, Rosario Oliveira, Wim Teughels, et al.. Corrosion behaviour of titanium in the presence of Streptococcus mutans. European Journal Of Esthetic Dentistry, Quintessence Publishing Co, Inc, 2013, 41 (6), pp.528-534. 〈10.1016/j.jdent.2013.03.008〉. 〈hal-01240415〉

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