Structural analysis of modified hydroxyapatite powders

Fanovich, María Alejandra; Castro, M. S.; López, José Manuel

doi:10.1016/s0025-5408(01)00526-8

Cited by 9 publications

(7 citation statements)

References 17 publications

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“…The second fitting component is the isotropic line with g iso = 1.9990. The same signal was previously observed in modified HAP powders and attributed to V O - center—an electron localized on an oxygen vacancy [ 24 ]. To describe the spectrum of T1 sample, one more line with g iso = 2.0026 is needed.…”

Section: Resultssupporting

confidence: 80%

Structure of Biocompatible Coatings Produced from Hydroxyapatite Nanoparticles by Detonation Spraying

et al. 2015

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Detonation-produced hydroxyapatite coatings were studied by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), Raman spectroscopy, and electron paramagnetic resonance (EPR) spectroscopy. The source material for detonation spraying was a B-type carbonated hydroxyapatite powder. The coatings consisted of tetracalcium phosphate and apatite. The ratio depended slightly on the degree of crystallinity of the initial powder and processing parameters of the coating preparation. The tetracalcium phosphate phase was homogeneous; the apatite phase contained defects localized on the sixfold axis and consisted of hydroxyapatite and oxyapatite. Technological factors contributing to the transformation of hydroxyapatite powder structure during coating formation by detonation spraying are discussed.

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Section: Resultssupporting

confidence: 80%

Structure of Biocompatible Coatings Produced from Hydroxyapatite Nanoparticles by Detonation Spraying

et al. 2015

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“…The apatite structure can be preserved with a Ca/P ratio as low as 1.5, therefore, HA with a lower than normal ratio (1.67) may be characterized as calcium deficient or non-stoichiometric. When the molar ratio is lower than 1.67, HA partially decomposes to β-TCP at a higher temperature 135) .…”

Section: Discussionmentioning

confidence: 99%

A review of bioceramics-based dental restorative materials

Khan

Syed

2019

Dent. Mater. J.

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Currently, much has been published related to conventional resin-based composites and adhesives; however, little information is available about bioceramics-based restorative materials. The aim was to structure this topic into its component parts and to highlight the translational research that has been conducted up to the present time. A literature search was done from indexed journals up to September 2017. The main search terms used were based on dental resin-based composites, dental adhesives along with bioactive glass and the calcium phosphate family. The results showed that in 123 articles, amorphous calcium phosphate (39.83%), hydroxyapatite (23.5%), bioactive glass (16.2%), dicalcium phosphate (5.69%), monocalcium phosphate monohydrate (3.25%), and tricalcium phosphate (2.43%) have been used in restorative materials. Moreover, seven studies were found related to a newly developed commercial bioactive composite. The utilization of bioactive materials for tooth restorations can promote remineralization and a durable seal of the tooth-material interface.

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“…[2][3][4][5][6][7] Composites of b-TCP and HAP biphase phosphates combine the excellent bioactivity of the two phases: the good osteoconductivity of HAP and the high properties of resorbability (bioresorbability) of b-TCP. 8,9 Thus, these different properties of the two phases give impetus for study of such biphase type of Ca phosphates. Understanding the synthetic characteristics and structural chemistry of calcium phosphate materials is a key into their improved medical application, but their chemistry is complex, offering diverse structure with intrinsic compositional variation.…”

Section: Introductionmentioning

confidence: 99%

Effects of high energy dry milling on biphase calcium phosphates

Ilieva

Dyulgerova

Petrov

et al. 2013

Advances in Applied Ceramics

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The effect of high energy dry milling on the structural and crystalline state of sintered biphase calcium phosphates was studied. After various periods of grinding, the initial biphase calcium phosphate material alters its crystalline structure and phase composition. The phase transformations achieved during milling were recorded by powder X-ray diffraction, scanning electron microscopy, infrared spectroscopy and chemical analysis. X-ray diffraction analysis of samples milled for 20 h showed that the initial composition of the biphase ceramics changed and part of btertiary calcium phosphate was nanocrystalline and partially in amorphous state. Hydroxylapatite fully transformed into nanocrystalline phase. Cytotoxicity tests of samples milled for 20 h clearly present cellular viability with pronounced biological activity.

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Structural analysis of modified hydroxyapatite powders

Cited by 9 publications

References 17 publications

Structure of Biocompatible Coatings Produced from Hydroxyapatite Nanoparticles by Detonation Spraying

Structure of Biocompatible Coatings Produced from Hydroxyapatite Nanoparticles by Detonation Spraying

A review of bioceramics-based dental restorative materials

Effects of high energy dry milling on biphase calcium phosphates

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