Journal ArticleDOI
Influence of microwave power, irradiation time and polymeric additions on synthesis of nanocrystalline hydroxyapatite
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In this article, the effect of microwave irradiation power and time on the crystallization of synthetic hydroxyapatite (HA) was studied and it was found that the crystallinity of the precipitated HA increases with increasing microwave irradiance time and/or power.Abstract:
Synthetic hydroxyapatite (HA) has been extensively used as an implant material owing to its excellent osteoconductive properties. The preparation of nanocrystalline HA is of paramount importance as the large surface area of the diminutive crystals makes them very active and consequently strongly affects the properties of it. In this paper, to study the effect of microwave irradiation power and time, nanocrystalline HA was synthesised at different microwave irradiation times (15, 45, 120, 240 and 600 min) and with different microwave powers (800 and 1100 W). This study also investigated the crystallisation of HA in the presence of sodium alginate and alginic acid at different addition levels (5, 10 and 15 wt-% to the final HA). It was found that crystallinity of the HA increases with increasing microwave irradiation time and/or power. Sodium alginate or alginic acid addition during crystallisation of HA decreases the crystal size and crystallinity of the precipitated HA.read more
Citations
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X-ray peak broadening studies of nanocrystalline hydroxyapatite by Williamson-Hall analysis
TL;DR: In this article, annealed hydroxyapatite (HA) nanoparticles were prepared by microwave synthesis method and the obtained powder is annesaled at 800°C for 2h.
Journal ArticleDOI
Estimation of Crystallite Size, Lattice Strain and Dislocation Density of Nanocrystalline Carbonate Substituted Hydroxyapatite by X-ray Peak Variance Analysis☆
TL;DR: In this article, X-ray peak profile analysis by variance method is employed to evaluate the micro structural parameters of nanostructured hydroxyapatite-based nanoparticles, namely, crystallite size, mean squared lattice strain, root mean-squared-latice strain and dislocation density.
Journal ArticleDOI
Synthesis and characterization of porous shell-like nano hydroxyapatite using cetrimide as template.
P. Michael S. L. Shanthi,R.V. Mangalaraja,A. P. Uthirakumar,Sivan Velmathi,Thailampillai Balasubramanian,Mahalingam Ashok +5 more
TL;DR: The successful preparation of shell-like nano HAp spheres with fine morphology, uniform size around 200 nm, and stoichiometry ratio 1.7 using the surfactant tetradecyltrimethylammonium bromide (Cetrimide) is reported.
Journal ArticleDOI
Studies on favorable ionic conduction and structural properties of biopolymer electrolytes system-based alginate
TL;DR: In this article, a solid biopolymer electrolytes (SBEs)-based alginate-doped NH4Br was carried out and prepared via casting technique, and the SBEs system was characterized using Fourier transform infrared, thermal gravimetric analysis, differential scanning calorimetry, X-ray diffraction, scanning electron microscope, and electrical impedance spectroscopy.
Journal ArticleDOI
Effect of hydrothermal treatment temperature on the hydroxyapatite coatings deposited by electrochemical method
He Daihua,Xuexian Zhang,Ping Liu,Xinkuan Liu,Xiaohong Chen,Fengcang Ma,Wei Li,Ke Zhang,Honglei Zhou +8 more
TL;DR: In this article, the effects of hydrothermal treatment temperatures on the hydroxyapatite coating composition, microstructure, crystallinity, as well as on the bonding strength between coatings and substrates, were investigated.
References
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Enhanced functions of osteoblasts on nanophase ceramics
TL;DR: The results of the present study provided the first evidence of enhanced long-term (on the order of days to weeks) functions of osteoblasts cultured on nanophase ceramics, and clearly represent a unique and promising class of orthopaedic/dental implant formulations with improved osseointegrative properties.
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Densification behaviour and mechanisms of synthetic hydroxyapatites
TL;DR: In this paper, the authors used dilatometric measurements in isothermal regime in the range of temperature 750-1250°C to evaluate the influence of different powder features (including the effect of calcination treatment) on densification.
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Cell-interactive Alginate Hydrogels for Bone Tissue Engineering
TL;DR: Findings demonstrate that biomaterials may be designed to control bone development from transplanted cells, as well as demonstrate that adhesion ligands covalently coupled to hydrogel carriers would allow one to control pre-osteoblast cell attachment, proliferation, and differentiation.