title: Biomimetic formation of hydroxyapatite investigated by analytical techniques with high resolution.
abstract: Morphology, phase and chemical compositions of atmospheric plasma-sprayed (APS) hydroxyapatite (HAp) coatings were investigated by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), proton-induced X-ray emission (PIXE) and Rutherford backscattering spectrometry (RBS). The study involved as-sprayed coatings and coatings incubated in simulated body fluid (rSBF) for up to 56 days. The results obtained using combined contributions from three complementary analytical techniques confirm that secondary Ca-deficient defect hydroxyapatite precipitated by a biomimetic process from the simulated body fluid onto the HAp coating surface after a prolonged induction time. Owing to its sensitivity proton-induced X-ray emission (PIXE) provides information on in vitro resorption of calcium phosphate ceramics and dynamic dissolution/precipitation events occurring during the incubation process.
authors.affiliation: University Center of Medical Technology (UZMT), Ruhr-Universität Bochum, Bochum, Germany. robert.heimann@ocean-gate.de
authors.forename: R B
authors.initials: RB
authors.lastname: Heimann
authors.forename: T P
authors.initials: TP
authors.lastname: Ntsoane
authors.forename: C A
authors.initials: CA
authors.lastname: Pineda-Vargas
authors.forename: W J
authors.initials: WJ
authors.lastname: Przybylowicz
authors.forename: M
authors.initials: M
authors.lastname: Topić
mesh_terms: D032701:Biomimetics; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D017886:Durapatite / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D012542:Scattering, Radiation; D014961:X-Ray Diffraction; D014965:X-Rays
chemical_list: D020099:Coated Materials, Biocompatible; D017886:Durapatite