Incorporation of Ca, P, and Si on bioactive coatings produced by plasma electrolytic oxidation: The role of electrolyte concentration and treatment duration

Autor(es)

Vieira Marques, Isabella da Silva ^[1] ; da Cruz, Nilson Cristino ^[2] ; Landers, Richard ^[3] ; Yuan, Judy Chia-Chun ^[4] ; Mesquita, Marcelo Ferraz ^[1] ; Sukotjo, Cortino ^[4] ; Mathew, Mathew T. ^[5] ; 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 Estadual Paulista UNESP, Engn Coll, Lab Technol Plasmas, Av Tres Marco 511, BR-18087180 Sorocaba, SP - Brazil

^[3] Univ Campinas UNICAMP, Inst Phys Gleb Wataghin, Cidade Univ Zeferino Vaz, BR-13083859 Campinas, SP - Brazil

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

^[5] Rush Univ, Med Ctr, Dept Orthoped Surg, 1611 W Harrison, Chicago, IL 60612 - USA

• Tipo de documento: Artigo Científico
• Fonte: BIOINTERPHASES; v. 10, n. 4 DEC 2015.
• Citações Web of Science: 4

Resumo

The objectives of the present study were to produce bioactive coatings in solutions containing Ca, P, and Si by plasma electrolytic oxidation (PEO) on commercially pure titanium, to investigate the influence of different electrolytes concentration and treatment duration on the produced anodic films and to evaluate biocompatibility properties. The anodic films were characterized using scanning electron microscopy, energy-dispersive spectroscopy, atomic force microscopy, and x-ray diffraction and x-ray photoelectron spectroscopies. The surface energy and roughness were also evaluated. PEO process parameters influenced the crystalline structure formation and surface topography of the anodic films. Higher Ca content produced larger porous (volcanolike appearance) and thicker oxide layers when compared to the lower content. Treatment duration did not produce any topography difference. The treatment modified the surface chemistry, producing an enriched oxide layer with bioactive elements in the form of phosphate compounds, which may be responsible for mimicking bone surface. In addition, a rough surface with increased surface energy was generated. Optimal spreading and proliferation of human mesenchymal stem cells was achieved by PEO treatment, demonstrating excellent biocompatibility of the surface. The main finding is that the biofunctionalization with higher Ca/P on Ti-surface can improve surface features, potentially considered as a candidate for dental implants. (C) 2015 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