An Evaluation of Bioactive Glass/Calcium Phosphate Cement Composite, Synthesized via Sol-Gel Method

摘要

In this study four types of calcium phosphate cement/bioactive glass composites have been synthesized via mixing and sol-gel method and the effect of hydroxyapatite/tricalcium phosphate ratio on its mechanical properties and setting time was investigated. The prepared samples were characterized using X-ray diffraction (XRD), foureir transform infra-red spectroscopy (FTIR), scanning electron microscopy (SEM), mechanical testing and setting time measurement. XRD analysis showed the amorphous structure of the prepared bioactive glass. But the patterns of the prepared composite had sharp peaks because of their crystalline structure. FTIR analysis indicated that the composites had carbonated calcium phosphate structure. SEM micrographs illustrated amorphous calcium phosphate particles with irregular shapes. With increasing the HA/TCP ratio, Young's modulus and compressive strength of the composites increased from 179 to 453 MPa and from 20 to 38 MPa respectively. The setting time of the samples decreased with increasing the HA/TCP ratio from 22 to 18 minutes.