ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Simulated body fluid (SBF) solutions are widely used for in vitro bioactivity tests and tocoat bioinert materials with biomimetic calcium phosphates. In this study SBF solutions with varyingHCO3- content were used to precipitate hydroxy carbonated apatite (HCA) on a bioactive titaniumsurface. XRD as well as cross-sectional TEM analyses revealed that the biomimetically derivedcrystallites show a preferred growth orientation in direction of their c-axis and perpendicular to thesurface of the substrate. FTIR and Raman analyses revealed that, as long as the HCO3- concentrationin the testing solutions is below 20 mmol/l, only B-type HCA precipitates. Using SBF with a HCO3-concentration equal to human blood plasma (27 mmol/l) leads to a AB-type substitution where, inaccordance with bone mineral, CO32- substitutes PO43- as well as OH-
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.725.pdf
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