Micro-PIXE analysis of bioconductive hydroxyapatite coatings on titanium alloy

Bioconductive materials and in particular implants using Ti alloy (Ti6–Al4–V) coated with hydroxyapatite (HAp) have proved to be a suitable surgical procedure. However, experience has shown that these implants not always have the required reliability to guarantee their expected life-span of approxim...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2013-09, Vol.297 (3), p.457-461
Main Authors: Pineda-Vargas, C. A., Topic, M., Ntsoane, T.
Format: Article
Language:English
Subjects:
Analysis
Biocompatibility
Biomedical materials
Bones
Chemistry
Chemistry and Materials Science
Coatings
Coatings industry
Diagnostic Radiology
Hadrons
Heavy Ions
Hydroxyapatite
Inorganic Chemistry
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Protective coatings
Specialty metals industry
Surgical implants
Titanium
Titanium alloys
Titanium base alloys
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Summary:Bioconductive materials and in particular implants using Ti alloy (Ti6–Al4–V) coated with hydroxyapatite (HAp) have proved to be a suitable surgical procedure. However, experience has shown that these implants not always have the required reliability to guarantee their expected life-span of approximate 15 years. In this research, experimental Ti alloy-implants coated with HAp and incubated in a simulated body fluid (r-SBF) under controlled physiological conditions were studied by nuclear microprobe (NMP). Selected HAp coatings, were analysed by micro-PIXE using protons of 1.5 MeV at the iThemba LABS NMP facility. Major elements (Ti, Al, V, Ca and P) as well as trace elements (Si, K, Fe, Zn and Sr) were determined. The effect of longer incubation time was of particular interest. Results confirmed that secondary Ca-deficient defect hydroxyapatite precipitated from the simulated body solution onto the HAp coating surface after prolonged incubation. This newly formed layer is thought to be of vital importance for bonding of implants with living bone tissue.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-012-2405-7