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

Author(s)

Silva Souza, Joao Gabriel ^[1] ; Beline, Thamara ^[1] ; Matos, Adaias Oliveira ^[1] ; Costa Oliveira, Barbara Emanoele ^[2] ; Ricomini-Filho, Antonio Pedro ^[2] ; Ricardo Barao, Valentim Adelino ^[1]

Affiliation

^[1] Univ Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, Av Limeira 901, BR-13414903 Piracicaba - Brazil

^[2] Univ Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Dept Physiol Sci, Piracicaba - Brazil

• Document type: Journal article
• Source: JOURNAL OF PROSTHETIC DENTISTRY; v. 120, n. 2, p. 290-298, AUG 2018.
• Web of Science Citations: 2

Abstract

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 (alpha=.05). Results. The biofilm exposed to sucrose had an increased biofilm dry weight (P<.05). The poly-saccharide 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. (AU)

• FAPESP's process: 15/23118-2 - Antibacterial effect and biocompatibility evaluation of glow discharge plasma treatment on titanium surface: in vitro and in situ study
• Grantee: João Gabriel Silva Souza
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/11470-6 - Magnetron sputtering deposition of tantalum oxide (Ta2O5) films onto titanium surface for biomedical applications: electrochemical behavior, biocompatibility and microbiologic analysis
• Grantee: Valentim Adelino Ricardo Barão
• Support Opportunities: Regular Research Grants