| Title | CaO-P 2O
5 glass hydroxyapatite double-layer plasma-sprayed coating: In vitro bioactivity evaluation
|
| Publication Type | Journal Article |
| 1999 |
| Authors | Ferraz, MP, Monteiro, FJ, Santos, JD |
| Journal | Journal of Biomedical Materials ResearchJ. Biomed. Mater. Res. |
| Volume | 45 |
| Issue | 4New York, NY, United States |
| Pagination | 376 - 383 |
| Date Published | 1999/// |
| 00219304 (ISSN) |
| alloy, Alloys, Apatite, article, Atomic absorption spectroscopy, Atomic spectroscopy, Bioactivity, Biocompatibility, biomaterial, Biomaterials, Biomedical engineering, Body fluids, Calcium, Calcium Compounds, CaO SiO2 P2O5 CaF2 glass, CaO-SiO2-P2O5-CaF2 glass, Chemical analysis, chemical composition, Coated Materials, Biocompatible, Double layer coatings, Double-layer coatings, Durapatite, film, glass, Glass plasma spraying, human, Humans, hydroxyapatite, immersion, implant, in vitro study, Ionic solution changes, Magnesium, materials testing, Molybdenum blue, Multilayers, Particle Size, phosphate, Phosphate minerals, Phosphates, Phosphorus Compounds, phosphorus pentoxide, Plasma spraying, potassium, powder, Powders, resin cement, Resin Cements, Scanning electron microscopy, Sodium, solution and solubility, Solutions, structure analysis, Substrates, Surface Properties, surface property, thickness, Tissue, Titanium, titanium alloy (TiAl6V4), Titanium alloys, X ray photoelectron spectroscopy |
| Double-layer composite coatings composed of a P 2O
5-based glass/Ca
10(PO
4)
6(OH)
2 (HA) mixture top layer and a simple HA underlayer, on Ti-6AI-4V substrates, were prepared using a plasma-spraying technique. The in vitro bioactivity of these coatings was assessed by immersion testing in simulated body fluid. Both scanning electron microscopy (SEM) analysis and the ionic solution changes followed by atomic absorption spectroscopy and the molybdenum blue method demonstrated that these composite coatings induce a faster surface Ca-P layer formation than the simple HA coatings used as a control. X-ray photoelectron spectroscopy (XPS) analysis demonstrated that the Ca-P layer formed was apatite. The combination of SEM and XPS analyses showed that the apatite layer was a calcium-deficient hydroxyapatite with a Ca/P ranging from 1.3 to 1.4 with CO
3
2- groups contained in the structure.
Double-layer composite coatings composed of a P
2O
5-based glass/Ca
10(PO
4)
6(OH)
2 (HA) mixture top layer and a simple HA underlayer, on Ti-6AI-4V substrates, were prepared using a plasma-spraying technique. The in vitro bioactivity of these coatings was assessed by immersion testing in simulated body fluid. Both scanning electron microscopy (SEM) analysis and the ionic solution changes followed by atomic absorption spectroscopy and the molybdenum blue method demonstrated that these composite coatings induce a faster surface Ca-P layer formation than the simple HA coatings used as a control. X-ray photoelectron spectroscopy (XPS) analysis demonstrated that the Ca-P layer formed was apatite. The combination of SEM and XPS analyses showed that the apatite layer was a calcium-deficient hydroxyapatite with a Ca/P ranging from 1.3 to 1.4 with CO
3
2- groups contained in the structure.
|
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