WET-CHEMICAL PRECIPITATION METHOD OF SYNTHESIS OFHYDROXYAPATTE AND FLUOROAPATTENANOPARTICLES FORDENTAL, GLASSIONOMER CEMENTS

Bioceramics, such as, hydroxyapatite (HA) and fluoroapatite (FA) have been recognized as substitute materials for bone and teeth.(e.g. glass ionomer cements) in orthopedic and dentistry fields due to their chemical and biological compatibility to human hard tissue which are considered as calcium phosphate complexes. Hydroxyapatite and fluoroapatite have Ca10(PO4)6(OH), and Ca10(PO4)6(F), formulas, respectively. In this research, both of these inorganic nanoparticles have been synthesized via wet-chemical precipitation method. For this purpose, diammonium hydrogen phosphate (dahp), hydrated calcium nitrate (hcn), and ammonium fluoride (af) were used as the precursors for the preparation of the nanoparticles. HA nanoparticles was synthesized by mixing aqueous solution of dahp with alcoholic solution of hcn followed by drying the resulting precipitate and calcination at 800°C. Similarly, FA was prepared by mixing aqueous solution of af with alcoholic solution of hcn followed by addition of the resulting solution to dhap solution and then the precipitate was dried and calcinated at 600,700 and 800°C. Both of the nanoparticles were characterized by Fourier transform infrared (FT-IR), X-ray diffractin (XRD), Scanning elecnatron microscopy (SEM) and Inductive coupling plasma (ICP-AES). Results of the analyses demonstrated that the size of HA and FA nanoparticles were in the range of 50-60 nm, having spherical and semispherical morphology.

Keywords:

Bioceramic materials , Hydroxyapatite , Fluoroapatite , Nanoparticles , Wet-Chemicalprecipitation