Autor(es):Mostrar menos -

Ogawa, Erika S. ^{[1, 2]} ; Matos, Adaias O. ^{[1, 2]} ; Beline, Thamara ^{[1, 2]} ; Marques, Isabella S. V. ^[2] ; Sukotjo, Cortino ^{[3, 4]} ; Mathew, Mathew T. ^{[5, 4]} ; Rangel, Elidiane C. ^{[1, 6]} ; Cruz, Nilson C. ^{[1, 6]} ; Mesquita, Marcelo F. ^[2] ; Consani, Rafael X. ^[2] ; Barao, Valentim A. R. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] IBTN Br Inst Biomat Tribocorros & Nanomed, Brazilian Branch, Sao Paulo - Brazil

^[2] Univ Campinas UNICAMP, Dept Prosthodont & Periodontol, Piracicaba Dent Sch, Ave Limeira 901, BR-13414903 Sao Paulo - Brazil

^[3] Univ Illinois, Dept Restorat Dent, Coll Dent, 801 S Paulina, Chicago, IL 60612 - USA

^[4] IBTN, Chicago, IL - USA

^[5] Univ Illinois, Coll Med Rockford, Dept Biomed Sci, 1601 Parkview Ave, Rockford, IL 61107 - USA

^[6] Univ Estadual Paulista UNESP, Lab Technol Plasmas, Engn Coll, Ave Tres Marco 511, BR-18087180 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Science & Engineering C-Materials for Biological Applications; v. 65, p. 251-261, AUG 1 2016.
• Citações Web of Science: 9

Resumo

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. (AU)

• Processo FAPESP: 13/08451-1 - Estabilidade eletroquímica do Ticp com superfícies modificadas por ácido e jateamento com óxido de alumínio
• Beneficiário: Valentim Adelino Ricardo Barão
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/24112-2 - Estabilidade Eletroquímica do Ticp com Superfícies Modificadas por Ácido e Jateamento com Óxido de Alumínio
• Beneficiário: Erika Shiguematsu Ogawa
• Modalidade de apoio: Bolsas no Brasil - Mestrado