Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/320102
Type: Artigo de Periódico
Title: Surface-treated Commercially Pure Titanium For Biomedical Applications: Electrochemical, Structural, Mechanical And Chemical Characterizations
Author: Ogawa
ES; Matos
AO; Beline
T; Marques
ISV; Sukotjo
C; Mathew
MT; Rangel
EC; Cruz
NC; Mesquita
MF; Consani
RX; Barao
VAR
Abstract: Modified surfaces have improved the biological performance and biomechanical fixation of dental implants compared to machined (polished) surfaces. However, there is a lack of knowledge about the surface properties of titanium (Ti) as a function of different surface treatment. This study investigated the role of surface treatments on the electrochemical, structural, mechanical and chemical properties of commercial pure titanium (cp-Ti) under different electrolytes. Cp-Ti discs were divided into 6 groups (n = 5): machined (M-control); etched with HCl + H2O2 (Cl), H2SO4 + H2O2 (5); sandblasted with Al2O3 (Sb), Al2O3 followed by HCl + H2O2 (SbCl), and Al2O3 followed by H2SO4 + H2O2 (SbS). Electrochemical tests were conducted in artificial saliva (pHs 3; 6.5 and 9) and simulated body fluid (SBF-pH 7.4). All surfaces were characterized before and after corrosion tests using atomic force microscopy, scanning electron microscopy, energy dispersive microscopy, X-ray diffraction, surface roughness, Vickers microhardness and surface free energy. The results indicated that Cl group exhibited the highest polarization resistance (R-p) and the lowest capacitance (Q) and corrosion current density (I-corr) values. Reduced corrosion stability was noted for the sandblasted groups. Acidic artificial saliva decreased the R-p values of cp-Ti surfaces and produced the highest I-corr values. Also, the surface treatment and corrosion process influenced the surface roughness, Vickers microhardness and surface free energy. Based on these results, it can be concluded that acid-etching treatment improved the electrochemical stability of cp-Ti and all treated surfaces behaved negatively in acidic artificial saliva. (C) 2016 Elsevier B.V. All rights reserved.
Subject: Titanium
Corrosion
Electrochemistry
Electrochemical Impedance Spectroscopy
Dental Implant
X-ray Diffraction
Editor: ELSEVIER SCIENCE BV
Citation: Materials Science And Engineering: C. ELSEVIER SCIENCE BV, n. 65, p. 251 - 261.
Rights: fechado
Identifier DOI: 10.1016/j.msec.2016.04.036
Address: http://www-sciencedirect-com.ez88.periodicos.capes.gov.br/science/article/pii/S0928493116303344
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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