Flower-like Brushite structures on Mg

Brundavanam, Sridevi; Brundavanam, Ravi Krishna; Poinern, Gérrard Eddy Jai; Fawcett, Derek

doi:10.1016/j.mattod.2017.01.014

Cited by 10 publications

(9 citation statements)

References 10 publications

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“…The crystallographic parameters corroborated results of scientific studies of hydroxyapatite. According to these values, the atomic distances were generally within the expected values, indicating absence of significant cationic or anionic substitutional impurities when evaluated by atomic occupational factors and by lattice parameters [31,63,[67][68][69][70]. The numerical refinement adjustment values (weighted profile factor -Rwp) were lower than 12% which indicated a good fit between the data calculated by the theoretical model and the observed pattern [52,62].…”

Section: Resultsmentioning

confidence: 73%

Obtaining hydroxyapatite with different precursors for application as a biomaterial

et al. 2019

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The hydroxyapatite (HAp) is a ceramic biomaterial with wide application in the bone regeneration. It can be obtained by different routes and different precursors. In this study, the synthesis of HAp was carried out by precipitation and subsequent thermal treatment using different calcium precursors: calcium hydroxide from synthetic origin and calcium oxide obtained from the eggshell. The obtained materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy. By SEM, variations of the crystal size and the concentration of agglomerates were observed. FTIR and XRD analyses proved the formation of HAp and how the (mineral and biological) precursors affected the microstructure. The thermal decomposition process of the calcium oxide obtained from the eggshell showed to be more effective for the synthesis of the hydroxyapatite, resulting in more stable morphology and microstructure.

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Section: Resultsmentioning

confidence: 73%

Obtaining hydroxyapatite with different precursors for application as a biomaterial

et al. 2019

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“…The PU1 signals prevail because of their higher proportion. In the spectrum, 3a and 3c bands at 1024, 601, and 562 cm −1 correspond to phosphate bonds of nHA 29 that confirm its incorporation on the membrane. However, VA bands were not observed in spectra of Figure 3b,c because the lower concentration in the mixture and the most intense bands of VA were masked by PU bands.…”

Section: Resultsmentioning

confidence: 76%

“…Different bands corresponding to PU1 includes at 3451 and 3326 cm −1 originated from the overlapping stretching vibration of NH and OH, the carbonyl stretching vibration at 1716 and 1696 cm −1 , these characteristic peaks usually emerge at 1600–1750 cm −1 , stretching β of the CH 2 polyether at 2924 cm −1 , stretching α and β CH 2 polyether at 2854 cm −1 , stretching of CN and flexion of NH at 1527 cm −1 , stretching of CN amide III at a band at 1227 cm −1 , and the ether absorbance of PTMEG around 1110 cm −1 29 …”

Section: Resultsmentioning

confidence: 99%

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Polyurethane electrospun membranes with hydroxyapatite‐vancomycin for potential application in bone tissue engineering and drug delivery

Vásquez-López

Castillo‐Ortega

Chan-Chan

et al. 2021

J of Applied Polymer Sci

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The purpose of this study is to evaluate the drug delivery behavior and other properties of electrospun composite membranes for potential use in tissue engineering. Tecoflex® (PU1), and a lab‐made polyurethane (PU2) were studied. They were mixed with nano‐hydroxyapatite (PU1‐nHA and PU2‐nHA) and vancomycin (PU1‐VA and PU2‐VA) or mixed with both, nHA and VA (PU1‐nHA‐VA and PU2‐nHA‐VA). Scanning electron microscopy showed a porous structure in all the electrospun membranes with smooth fibers in PU1 and its composites with sizes in the range of 0.6–0.9 μm and nanoparticles of HA, both, adhered and embedded on the PU fibers were observed. nHA and VA affected the thermal and mechanical behavior of composites. Elastic modulus, cytotoxicity, and kinetic release were affected by the PU and nHA. Cell viability up to 75% showed that all membrane extracts are not cytotoxic while microbial inhibition activity was observed in PU1‐VA, PU1‐nHA‐VA, and PU2‐VA.

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“…[ 10 ] Different theoretical approaches to calculate the surface free energy of NPs such as the tight‐binding parametrizations, the ab initio calculations, the broken bond rule, the modified embedded atom method, the equivalent crystal theory, the thermodynamic model, molecular dynamic simulations, etc., are being used to model the crystal structures and relate these to the physico‐chemical properties of the NPs. [ 10–12 ]…”

Section: Introductionmentioning

confidence: 99%

Morphological Evolution of Hydroxyapatite Nanoparticles, Synthesized via Modified Sol‐Gel and Microemulsion Technique, in Response to Their Synthesis Microenvironment

Kadu

Tripathi

Kowshik

et al. 2022

Crystal Research and Technology

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Methods for the synthesis and characterization of well‐dispersed nanostructured materials are widely explored for potential applications in various fields. Several challenges in synthesizing nanoparticles (NPs) with controlled morphology, narrow size distribution, and optimum stability are tested but the fundamental understanding of the growth of NP crystal structure leading to various morphologies still needs to be addressed. This study attempts to understand the role of the synthesis environment, i.e., solvents, stabilizing agents, and the surfactant concentration, that controls the crystal growth of the synthesized biocompatible hydroxyapatite nanoparticles resulting in different shapes and sizes. The lattice parameters, space group, interplanar spacing, and unit cell dimensions are calculated using the experimentally obtained powder diffraction patterns for the various NPs. Atoms are placed at random sites in the unit cell based on the collected crystallographic information, and a final atomic arrangement and subsequent morphological evolution are arrived at via local and global optimization.

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Flower-like Brushite structures on Mg

Cited by 10 publications

References 10 publications

Obtaining hydroxyapatite with different precursors for application as a biomaterial

Obtaining hydroxyapatite with different precursors for application as a biomaterial

Polyurethane electrospun membranes with hydroxyapatite‐vancomycin for potential application in bone tissue engineering and drug delivery

Morphological Evolution of Hydroxyapatite Nanoparticles, Synthesized via Modified Sol‐Gel and Microemulsion Technique, in Response to Their Synthesis Microenvironment

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