BEHAVIOR OF COMPOSITE CA P BIOCERAMICS IN SIMULATED BODY-FLUID/

Behavior of Ca/P ceramics enhanced by MgAl2O4 in simulated body fluid( SBF) was studied. Results show that, biological apatite can precipitat e on the surface of Ca/P composite ceramics, however, dissolution of t he surface of Ca/P composite ceramics also occurs due to a kind of amo rphous material which is produced through reaction of MgAl2O4 with Ca/ P ceramics at elevated temperature, therefore, the behavior of Ca/P co mposite ceramics in SBF mainly depends on those two processes. Analyse s of joint influence of those two processes show that low content of M gAl2O4 favors the formation of biological apatite, therefore, brings a bout higher bioactivity.