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....

Titanium has an osseointegrative property, while hydroxyapatite has an osteoconductive property. It remains a matter of controversy among researchers whether hydroxyapatite has higher osteoblast compatibility than titanium. Here, we compared the activities between osteoblasts cultured on titanium and those cultured on hydroxyapatite. An osteoblast-like cell line, MC3T3-E1, was cultured on machi...

This paper described the development of chitosan composites containing precipitated hydroxyapatite particles for potential applications in orthopaedic surgery or waste water treatment. The synthetic process and morphology of hydroxyapatite were reported. The effects of hydroxyapatite content on the microstructure and mechanical properties of composites were investigated. It was found that the Y...

The regularities of obtaining silver nanoparticles in the presence polyvinylpyrrolidone, which was both a reductant and stabilizer nanoparticle dispersion, have been studied. influence such factors as temperature, polyvinylpyrrolidone amount, concentration nature salts on shape size has established. chemistry reaction with formation vinylsuccinimide units structure macromolecules proposed, is c...

static bone scan was performed in 46 patients for evaluation of ocular hydroxyapatite vascularization. study findings indicated that bone scan, with tc-99m mdp is an appropriate method for evaluation of hydroxyapatite vascularization and for estimating the time for peg insertion into the hydroxyapatite implant. our study showed proper hydroxyapatite vascularization when the ratio of activity in...

Abstract This research introduced a new poly-ether-ether-ketone calcium hydroxyapatite (PEEK-cHAp) composite for convenient, fast, and inexpensive femur bone-implant scaffold with different lattice structures to mimic natural bone structure. Fused deposition modelling (FDM) was used print hybrid PEEK-based filament-bearing bioactive material suited developing cHAp. Using FDM, the same PEEK will...

In this study the bioactivity of hydroxyapatite/poly(ε-caprolactone)–poly(ethylene glycol) bilayer coatings on Nitinol superelastic alloy was investigated. The surface of Nitinol alloy was activated by a thermo-chemical treatment and hydroxyapatite coating was electrodeposited on the alloy, followed by applying the polymer coating. The surface morphology of coatings was studied using FE-SEM and...