Electrochemical behavior of titanium exposed to a biofilm supplemented with different sucrose concentrations.

Autor: Souza JGS; Doctoral student, Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil., Beline T; Doctoral student, Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil., Matos AO; Doctoral student, Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil., Costa Oliveira BE; Doctoral student, Department of Physiological Sciences, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil., Ricomini-Filho AP; Professor, Department of Physiological Sciences, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil., Barão VAR; Assistant Professor, Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil. Electronic address: vbarao@unicamp.br.
Jazyk: angličtina
Zdroj: The Journal of prosthetic dentistry [J Prosthet Dent] 2018 Aug; Vol. 120 (2), pp. 290-298. Date of Electronic Publication: 2018 Mar 15.
DOI: 10.1016/j.prosdent.2017.10.012
Abstrakt: Statement of Problem: Biofilms can reduce the corrosion resistance of titanium because of the bacterial metabolism of fermentable carbohydrates, including sucrose. However, studies evaluating whether biofilms exposed to higher sucrose concentrations can affect the electrochemical behavior of titanium are lacking.
Purpose: The purpose of this in vitro study was to test the electrochemical behavior of titanium previously exposed to biofilm supplemented with different sucrose concentrations.
Material and Methods: Streptococcus mutans UA159 biofilms were formed on commercially pure titanium (cpTi) surfaces and supplemented constantly with different sucrose concentrations (0%, 1%, 10%, and 40%) for 7 days (experimental groups) (n=12 per group). CpTi disks without biofilm were used as a control (n=12). The standard electrochemical tests open-circuit potential, electrochemical impedance spectroscopy, and potentiodynamic curve were performed. Data were submitted to ANOVA and the Tukey honestly significant difference (HSD) tests (α=.05).
Results: The biofilm exposed to sucrose had an increased biofilm dry weight (P<.05). The polysaccharide amount and the pH drop were higher in the groups exposed to sucrose (P<.05). No difference was noted between the control and experimental groups for the electrochemical properties of cpTi (P>.05).
Conclusions: Biofilms exposed to greater carbohydrate concentration did not alter the corrosive behavior of titanium.
(Copyright © 2017 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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