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Type: Artigo de periódico
Title: Incorporation Of Ca, P, And Si On Bioactive Coatings Produced By Plasma Electrolytic Oxidation: The Role Of Electrolyte Concentration And Treatment Duration
Author: Vieira Marques
Isabella da Silva; da Cruz
Nilson Cristino; Landers
Richard; Yuan
Judy Chia-Chun; Mesquita
Marcelo Ferraz; Sukotjo
Cortino; Mathew
Mathew T.; Ricardo Barao
Valentim Adelino
Abstract: 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.
Subject: Micro-arc Oxidation
Apatite-forming Ability
Titanium Implants
Oxidized Coatings
Surface Oxides
Ti Substrate
Citation: Incorporation Of Ca, P, And Si On Bioactive Coatings Produced By Plasma Electrolytic Oxidation: The Role Of Electrolyte Concentration And Treatment Duration. Amer Inst Physics, v. 10, p. DEC-2015.
Rights: fechado
Identifier DOI: 10.1116/1.4932579
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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