Artículos de revistas
Surface-treated Commercially Pure Titanium For Biomedical Applications: Electrochemical, Structural, Mechanical And Chemical Characterizations
Registro en:
1873-0191
Materials Science And Engineering: C. ELSEVIER SCIENCE BV, n. 65, p. 251 - 261.
0928-4931
WOS:000376833200030
10.1016/j.msec.2016.04.036
Autor
Ogawa
ES; Matos
AO; Beline
T; Marques
ISV; Sukotjo
C; Mathew
MT; Rangel
EC; Cruz
NC; Mesquita
MF; Consani
RX; Barao
VAR
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) 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. 65
251 261 State of Sao Paulo Research Foundation (FAPESP) [2013/24112-2, 2013/08451-1] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)