Production of a biofunctional titanium surface using plasma electrolytic oxidation and glow-discharge plasma for biomedical applications

Autor(es):Mostrar menos -

Beline, Thamara ^[1] ; Vieira Marques, Isabella da Silva ^[1] ; Matos, Adaias O. ^[1] ; Ogawa, Erika S. ^[1] ; Ricomini-Filho, Antonio P. ^[2] ; Rangel, Elidiane C. ^[3] ; da Cruz, Nilson Cristino ^[3] ; Sukotjo, Cortino ^[4] ; Mathew, Mathew T. ^[5] ; Landers, Richard ^[6] ; Consani, Rafael L. X. ^[1] ; Mesquita, Marcelo Ferraz ^[1] ; Ricardo Barao, Valentim Adelino ^[1]

Afiliação do(s) autor(es)

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

^[2] Univ Campinas UNICAMP, Piracicaba Dent Sch, Dept Physiol Sci, Av Limeira 901, BR-13414903 Piracicaba, SP - Brazil

^[3] Univ Estadual Paulista UNESP, Engn Coll, Lab Technol Plasmas, Av Tres de Marco 511, BR-18087180 Sorocaba, SP - Brazil

^[4] Univ Illinois, Coll Dent, Dept Restorat Dent, 801 S Paulina, Chicago, IL 60612 - USA

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

^[6] Univ Campinas UNICAMP, Inst Phys Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOINTERPHASES; v. 11, n. 1 MAR 2016.
• Citações Web of Science: 12

Resumo

In this study, the authors tested the hypotheses that plasma electrolytic oxidation (PEO) and glow-discharge plasma (GDP) would improve the electrochemical, physical, chemical, and mechanical properties of commercially pure titanium (cpTi), and that blood protein adsorption on plasma-treated surfaces would increase. Machined and sandblasted surfaces were used as controls. Standard electrochemical tests were conducted in artificial saliva (pHs of 3.0, 6.5, and 9.0) and simulated body fluid. Surfaces were characterized by scanning electron microscopy, energy-dispersive spectroscopy, x-ray photoelectron spectroscopy, atomic force microscopy, x-ray diffraction, profilometry, Vickers microhardness, and surface energy. For biological assay, the adsorption of blood serum proteins (i.e., albumin, fibrinogen, and fibronectin) was tested. Higher values of polarization resistance and lower values of capacitance were noted for the PEO and GDP groups (p < 0.05). Acidic artificial saliva reduced the corrosion resistance of cpTi (p < 0.05). PEO and GDP treatments improved the surface properties by enrichment of the surface chemistry with bioactive elements and increased surface energy. PEO produced a porous oxide layer (5-mu m thickness), while GDP created a very thin oxide layer (0.76-mu m thickness). For the PEO group, the authors noted rutile and anatase crystalline structures that may be responsible for the corrosion barrier improvement and increased microhardness values. Plasma treatments were able to enhance the surface properties and electrochemical stability of titanium, while increasing protein adsorption levels. (C) 2016 American Vacuum Society. (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