Bioactivity of CaSiO3 and Porecalin-CaSiO3 Composites Prepared by Sol-Gel Method for Dental Applications

Abstract

In this study, the bioactivity of CaSiO3 and Porecalin-CaSiO3 composites have been investigated utilizing X-ray diffraction (XRD) and scanning electron microscopy-Energy-dispersive X-ray spectroscopy (SEM-EDS). CaSiO3 and P-CaSiO3 are prepared by Sol-Gel method for different weight percentages of CaSiO3 (P90CS10, P80CS20 and P70CS30 wt. %). The in vitro bioactive properties have been carried out by immersed the powder and sintered samples on different compositions in simulated body fluids at 32 day to evaluate their bioactivity. Ca/P ratio have been calculated through EDS measurements. Structural characterization revealed the amorphous phase of CaSiO3 when heated at 700 °C and phase transition to the crystalline phase when heated at 950 °C, where pseudowollastonite (α-CaSiO3) and Ca2(SiO4) phases have been appeared. CaSiO3 showed better bioactive ability in comparison with its composites. In general, the bioactivity increases with increasing the CaSiO3 time of immersion in stimulated body fluid (SBF). The closest value to the stoichiometric hydroxyapatite, Ca10(PO4)6(OH)2 has been observed with P70CS30 sintered specimen where Ca/P was 1.694.