Glass–ceramic filler particles containing various amounts of fluoroapatite–mullite crystalline phases were synthesised using SiO2–Al2O3–P2O5–CaF2–CaO system as the base glass formulation. Different additives were used to promote crystallisation in this system. Composite samples were prepared by incorporating the silane treated glass–ceramic particles into the BisGMA/TEGDMA (60 : 40 mass ratio) ...

Dicalcium phosphate dihydrate (DCPD) reacts with fluoride ion in an aqueous solution and forms stable fluoroapatite (FAp). This reaction requires a lag time to form nano-sized precursor, hydroxyapatite (HAp)-like calcium phosphate, on DCPD surface. This long lag time prevents DCPD from applying as an effective fluoride removal agent from waste water. The purpose of this study is to improve the ...

The aim of this study was to investigate the sol gel synthesis of HA/FA nanoparticles and the possible formation of TCP phase or unstoichiometric calcium deficient hydroxyapatite (CDHA) from the precursors with a Ca/P ratio of 1.62. In order to prepare the sol, the solutions of Triethyl phosphite, ammonium fluoride and calcium nitrate in ethanol were used respectively as P, F and Ca precursors....

the aim of this study was to investigate the sol gel synthesis of ha/fa nanoparticles and the possible formation of tcp phase or unstoichiometric calcium deficient hydroxyapatite (cdha) from the precursors with a ca/p ratio of 1.62. in order to prepare the sol, the solutions of triethyl phosphite, ammonium fluoride and calcium nitrate in ethanol were used respectively as p, f and ca precursors....

The aim of this study was to investigate the sol gel synthesis of HA/FA nanoparticles and the possible formation of TCP phase or unstoichiometric calcium deficient hydroxyapatite (CDHA) from the precursors with a Ca/P ratio of 1.62. In order to prepare the sol, the solutions of Triethyl phosphite, ammonium fluoride and calcium nitrate in ethanol were used respectively as P, F and Ca precursors....

Ibliform barnacles are among the few invertebrate animals harnessing calcium phosphate to construct hard tissue. The (31)P solid-state NMR (SSNMR) signal from the shell plates of Ibla cumingi (Iblidae) is broader than that of bone, and shifted by ca 1 ppm to low frequency. (1)H-(31)P heteronuclear correlation (HETCOR) experiments show a continuum of different phosphorus/phosphate atomic environ...

The need to improve the level of dental health population Ukraine was identified. prospects for use ceramic prostheses provide quality medical care in dentistry have been established. An analytical review various types and glass-ceramic materials used as tooth replacement: porcelain, alumina, zirconium oxide, glass-ceramics based on leucite lithium disilicate mica with addition fluorides. Pecul...