title: Electrochemical and biological characterization of coatings formed on Ti-15Mo alloy by plasma electrolytic oxidation.
abstract: β-Type titanium alloys are considered the future materials for bone implants. To improve the bioactivity of Ti-15Mo, the surface was modified using the plasma electrolytic oxidation (PEO) process. Tricalcium phosphate (TCP, Ca3PO4), wollastonite (CaSiO3) and silica (SiO2) were selected as additives in the anodizing bath to enhance the bioactivity of the coatings formed during the PEO process. Electrochemical analysis of the samples was performed in Ringer's solution at 37°C. The open-circuit potential (EOCP) as a function of time, corrosion potential (ECORR), corrosion current density (jCORR) and polarization resistance (Rp) of the samples were determined. Surface modification improved the corrosion resistance of Ti-15Mo in Ringer's solution. In vitro studies with MG-63 osteoblast-like cells were performed for 1, 3 and 7 days. After 24h, the cells were well adhered on the entire surfaces, and their number increased with increasing culture time. The coatings formed in basic solution with wollastonite exhibited better biological performance compared with the as-ground sample.
authors.affiliation: Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego Street 6, 44-100 Gliwice, Poland.
authors.forename: Alicja
authors.initials: A
authors.lastname: Kazek-Kęsik
authors.affiliation: Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza Street 30, 30-059 Krakow, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Krok-Borkowicz
authors.affiliation: Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza Street 30, 30-059 Krakow, Poland.
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Pamuła
authors.affiliation: Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego Street 6, 44-100 Gliwice, Poland. Electronic address: wojciech.simka@polsl.pl.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Simka
mesh_terms: D000497:Alloys; D020099:Coated Materials, Biocompatible; D004572:Electrolysis; D008855:Microscopy, Electron, Scanning; D008856:Microscopy, Fluorescence; D010084:Oxidation-Reduction; D058626:Plasma Gases; D017155:Wettability
chemical_list: D000497:Alloys; D020099:Coated Materials, Biocompatible; D058626:Plasma Gases; C525450:titanium molybdenum alloy
keywords: Bioactive compounds; Electrochemical analysis; MG-63 osteoblast-like cells; Plasma electrolytic oxidation; Titanium alloys