Characterization of calcium phosphates precipitated from simulated body fluid of different buffering capacities.
basic_science · Level V
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Abstract
The purpose of this experiment was to study the properties of calcium phosphate precipitated from simulated body fluids (SBFs) with different buffering capacities. The Ca/P molar ratios of the precipitates were determined and the microstructure of a sintered precipitate was studied. The results indicate that the pH of the SBF increases during calcium phosphate precipitations, which affects the Ca/P molar ratios and chemical compositions of these precipitates. A precipitate with a Ca/P molar ratio close to the stoichiometric molar ratio of hydroxyapatite was obtained when the pH of the SBF was continuously adjusted to 7.26 during precipitation. This precipitate has a fine-grained and laminated microstructure after sintering at 1000 degrees C in air. It seems that SBF can be used as a tool to study apatite-like precipitation in vitro when the pH of the solution is carefully controlled.
Medical subject headings
- Biocompatible Materials
- Body Fluids
- Durapatite