Berlin 2005 – scientific programme
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AKB: Biologische Physik
AKB 200: Poster Session II
AKB 200.49: Poster
Tuesday, March 8, 2005, 17:00–19:00, Poster TU C
Solid State 31P-NMR Investigations of Different Calcium Phosphates — •Inderchand Manjubala1, Sergey Maltsev2, Christian Jaeger2, and Peter Fratzl1 — 1Max-Planck Institute for Colloids and Interfaces, Department of Biomaterials, 14424 Potsdam, Germany — 2Bundesanstalt für Materialforschung und -prüfung, Projektgruppe I.3903, Richard Willstaetter Str. 11, D-12489 Berlin, Germany
Synthetic hydroxyapatite and carbonated apatite have been used widely as bone substitute ceramic material as they resemble the natural bone apatite. In this study in-situ formation of biphasic calcium phosphate ceramic consisting of a mixture of hydroxyapatite and tricalcium phosphate in various ratios is synthesized under microwave irradiation. The amount of TCP increases as the Ca/P ratio decreases. 31P solid-state nuclear magnetic resonance (NMR) with magic-angle spinning (MAS) was used to determine the structure of the various synthetic calcium phosphates in comparison with X-ray diffraction. The XRD study reveals biphasic structure with hydroxyapatite and tricalcium phosphate phase and the amount of TCP increases as Ca/P ratio decreases. The Ca/P was also estimated from EDAX analysis.