According to recent investigations , silicon level up to 0.5% wt werc observed in active growth areas in bone . It is therefore clear that Si substituted Hydroxyapatite would have a better bioactivity. In this study 3 Si substituted HA were synthesised and their moleculaor structure were determined using IR, Raman, EDXA and XRD techniques. present results show that Si has been incorporated in HA Structure as .
