α-Tricalcium phosphate (α-TCP) is one of the main reactants of the powder phase of
several bioactive calcium phosphate bone cements. After preparing TCP, the TCP was determined
by the measurement of X-ray diffraction, particle size, and scanning electron microscopy. Cements
were characterized using viscosity measurements, X-ray diffraction, scanning electron microscopy,
and compressive and tensile strengths etc. When citric acid was added as dispersant at different
concentration to α-tricalcium phosphate bone cements, it was found to act as a fluidizing agent
during the first stages of cement mixing. The setting time for cement without citric acid was 300
min, while setting times for cements prepared with 0.5-2.5 M citric acid were at a minimum of 4
min and a maximum of 35 min, respectively. The dissolution-precipitation reaction of α-tricalcium
phosphate was accelerated by adding citric acid and compressive and diametral tensile strength
increased.
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