Synthesis of nano hydroxyapatite powder that simulate teeth particle morphology and composition

Sanosh, K.P.; Chu, Min-Cheol; Balakrishnan, Avinash; Lee, Yongjin; Kim, T.N.; Cho, Seong-Jai

doi:10.1016/j.cap.2009.03.024

Cited by 133 publications

(84 citation statements)

References 28 publications

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“…equation's output, the crystallinity degree increases from 27.63% to 38.32% when the mechanical activation time goes up from 5 h to 15 h. These results are in good agreement with XRD profiles which show an extra sharpening of the characteristic peaks with further increasing the mechanical activation time to 15 h. The milled samples can be utilized to promote osseointegration or as a coating to promote bone ingrowth into prosthetic implants owing to their low level of crystallinity [34]. After thermal treatment at 700 ℃, the sum total of relative intensities of FAp peaks reach around 391.94%, 491.94% and 465.46% for the 5-h, 10-h and 15-h milled samples, respectively.…”

Section: Crystallinity Degreesupporting

confidence: 77%

Thermal treatment effect on structural features of mechano-synthesized fluorapatite-titania nanocomposite: A comparative study

Nasiri–Tabrizi

2014

J Adv Ceram

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Abstract:The influence of thermal treatment on the structural features of mechano-synthesized fluorapatite-titania composite nanopowders was studied. A mixture of calcium and phosphate reagents was mixed with a certain amount of titania (20 wt%) and then was mechanically activated for 5 h, 10 h and 15 h respectively. After that, the mechano-synthesized powders were annealed at 700 ℃ for 2 h. The crystallite size of the composite nanopowders estimated from Williamson-Hall method was in good agreement with transmission electron microscopy (TEM) analysis. Scanning electron microscopy (SEM)/TEM images confirmed the formation of a cluster-like composite which was composed of ellipse-like nanoparticles with an average size of about 16±7 nm after 15 h of milling. During the milling process, large variations in mechanochemical behavior of the CaHPO 4 -Ca(OH) 2 -CaF 2 -TiO 2 system were detected. After the beginning of milling, no trace of the composite was found due to the lack of sufficient time for the mechanical activation. When the mechanical activation time increased to 15 h, composite nanopowders with the crystallite size of around 21.66 nm were formed. During heating at 700 ℃, the recovery of crystallinity occurred and the fraction of crystalline phase reached a maximum around 88.79% for the 10-h milled sample. Results indicated that the structural features of the composite were strongly influenced by the subsequent annealing.

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Section: Crystallinity Degreesupporting

confidence: 77%

Thermal treatment effect on structural features of mechano-synthesized fluorapatite-titania nanocomposite: A comparative study

Nasiri–Tabrizi

2014

J Adv Ceram

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“…Most of these techniques produced rod-like crystals or whiskers, while plate-like shapes were obtained in just a few studies [335,345,347]. Other preparation methods of nanodimensional and/or nanocrystalline apatites of various states, shapes and sizes include sol-gel [30,188,231,232,270,328,[360][361][362][363][364][365][366][367][368][369][370][371][372][373][374][375][376], co-precipitation [271,333,334,[377][378][379][380], mechanochemical approach[65, 250,343,348,[381][382][383][384][385][386][387], mechanical alloying [388,389], ball milling [348,383,…”

Section: Nanodimensional and Nanocrystalline Apatitesmentioning

confidence: 99%

Nanodimensional and Nanocrystalline Calcium Orthophosphates

Dorozhkin¹

2012

AJBE

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Nano-sized particles and crystals play an important role in the formation of calcified tissues of various animals. For example, nano-sized and nanocrystalline calcium orthophosphates in the form of apatites of biological origin represent the basic inorganic building blocks of bones and teeth of mammals. Namely, according the recent developments in biomineralization, tens to hundreds nanodimensional crystals of a biological apatite are self-assembled into these complex structures. This process occurs under a strict control by bioorganic matrixes. Furthermore, both a greater viability and a better proliferation of various types of cells have been detected on smaller crystals of calcium orthophosphates. Thus, the nano-sized and nanocrystalline forms of calcium orthophosphates have a great potential to revolutionize the hard tissue-engineering field, starting from bone repair and augmentation to controlled drug delivery systems. This review reports on current state of the art and recent developments on the subject, starting from synthesis and characterization to biomedical and clinical applications. Furthermore, the review also discusses possible directions for future research and development.

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“…Similar to Panda et al (2014), crystallization of the FS-Hap powder has been also confirmed due to sharp peak intensity and well-resolved peaks in XRD pattern. The broad patterns around (211) and (002) indicate low crystalline HAp phase (Sanosh et al, 2009). This indicates a good result because low crystalline components may present an improved biodegradation behavior and are expected to be more metabolically active than the crystalline HAp (Bardhan et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Extraction, Characterization and Antimicrobial Activity of Hydroxyapatite From Seabass and Seabream Scale

Alparslan¹

2017

J Food Health Sci

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Abstract:The present study investigates the characterization of hydroxyapatite (HAp) extracted from seabass and seabream scales as by-product. Fish scales obtained from a seafood processing company were used to extract natural HAp powder. HAp powder was extracted by alkaline heat treatment of fish scales and the synthesized HAp (FS-HAp) was extensively characterized with Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. Calcium to phosphate ratio of the HAp was confirmed by inductively coupled plasma (ICP) and elemental analysis of HAp were also carried out using energy dispersive x-ray spectroscopy (EDS). The results of the characterization analysis were compared with commercial hydroxyapatite standard (CHAp) and it was clearly confirmed that the extracted FS-HAp exactly showed CHAp characteristics physicochemically which is used as biomaterial. However, well diffusion assay revealed out that synthesized hydroxyapatite showed no activity against C. albicans, S. aureus and E. coli. It was concluded that, instead of synthetic apatite, extracted FS-HAp presents a potential promising biomaterial as the raw materials are by-product which economically cheap and sustainable substances.

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Synthesis of nano hydroxyapatite powder that simulate teeth particle morphology and composition

Cited by 133 publications

References 28 publications

Thermal treatment effect on structural features of mechano-synthesized fluorapatite-titania nanocomposite: A comparative study

Thermal treatment effect on structural features of mechano-synthesized fluorapatite-titania nanocomposite: A comparative study

Nanodimensional and Nanocrystalline Calcium Orthophosphates

Extraction, Characterization and Antimicrobial Activity of Hydroxyapatite From Seabass and Seabream Scale

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