PREPARATION AND PROPERTIES OF SOL-GEL-DERIVED APATITE/WOLLASTONITE BIOGLASS BASED BONE CEMENT

In order to obtain glass bone cement with high properties,apatite/wollastonite(AW)bioglass was prepared by a sol-gel method,and AW glass-based bone cement(GBC)was synthesized by mixing this bioglass powder with a citric acid liquid.The possi- bility of using apatite/wollastonite bioglass as the solid body powder of glass bone cement was investigated.The phase transformation of AW bioglass heat treated at different temperatures,as well as the phase composition and compressive strength of GBC samples immersed in simulated body fluid for different times were analyzed by X-ray diffraction(XRD),Fourier transform infrared spectros- copy(FTIR)and omnipotent electronic intensity measurement.The results indicate that apatite and wollastonite crystals are formed at 700℃,and the crystallization of AW glass ceramic become stronger with the increasing of heat treatment temperature.For the GBC samples of 900℃heat-treated AW glass ceramic,with the prolonging of the immersion time in simulated body fluid,more CaCO3 and a few hydroxyapatite crystals are formed,and the compressive strength of this GBC sample is the strongest.