Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/244429
Type: Artigo de periódico
Title: Surface Treatment Influences Electrochemical Stability Of Cpti Exposed To Mouthwashes
Author: Beline
Thamara; Garcia
Camila S.; Ogawa
Erika S.; Marques
Isabella S. V.; Matos
Adaias O.; Sukotjo
Cortino; Mathew
Mathew T.; Mesquita
Marcelo F.; Consani
Rafael X.; Barao
Valentim A. R.
Abstract: The role of surface treatment on the electrochemical behavior of commercially pure titanium (cpTi) exposed to mouthwashes was tested. Seventy-five disks were divided into 15 groups according to surface treatment (machined, sandblasted with Al2O3, and acid etched) and electrolyte solution (artificial saliva - control, 0.12% chlorhexidine digluconate, 0.05% cetylpyridinium chloride, 0.2% sodium fluoride, and 1.5% hydrogen peroxide) (n = 5). Open-circuit-potential and electrochemical impedance spectroscopy were conducted at baseline and after 7 and 14 days of immersion in each solution. Potentiodynamic test and total weight loss of disks were performed after 14 days of immersion. Scanning electron microscopy, energy dispersive spectroscopy, white light interferometly and profilometry were conducted for surface characterization before and after the electrochernical tests. Sandblasting promoted the lowest polarization resistance (R-p) (P < .0001) and the highest capacitance (CPE) (P < .006), corrosion current density (I-corr) and corrosion rate (P < .0001). In contrast, acid etching increased R-p and reduced CPE, independent to the mouthwash; while hydrogen peroxide reduced R-p (P < .008) and increased I-corr and corrosion rate (P < .0001). The highest CPE values were found for hydrogen peroxide and 0.2% sodium fluoride. Immersion for longer period improved the electrochemical stability of cpTi (P < .05). In conclusion, acid etching enhanced the electrochemical stability of cpTi. Hydrogen peroxide and sodium fluoride reduced the resistance to corrosion of cpTi, independent to the surface treatment. Chlorhexidine gluconate and cetylpyridinium chloride did not alter the corrosive behavior of cpTi. (C) 2015 Elsevier B.V. All rights reserved.
Subject: Commercially Pure Titanium
Finite-element-analysis
Dental Implants
Corrosion Behavior
In-vitro
Streptococcus-mutans
Hydrogen-peroxide
Ti-6al-4v Alloy
Bone Integration
Sodium-fluoride
Country: AMSTERDAM
Editor: ELSEVIER SCIENCE BV
Citation: Surface Treatment Influences Electrochemical Stability Of Cpti Exposed To Mouthwashes. Elsevier Science Bv, v. 59, p. 1079-1088 FEB-2016.
Rights: embargo
Identifier DOI: 10.1016/j.msec.2015.11.045
Address: http://www.sciencedirect.com/science/article/pii/S0928493115305774
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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