Hydrothermal preparation of fibrous apatite and apatite sheet

Ioku, Koji; Yamauchi, Shota; Fujimori, Hirotaka; Goto, Seishi; Yoshimura, Masahiro

doi:10.1016/s0167-2738(02)00593-3

Cited by 99 publications

(65 citation statements)

References 4 publications

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“…Extraneous additives, such as EDTA [351], surfactants [352,359], anionic starburst dendrimer [353] etc., might be utilized to modify the morphology of nanodimensional and/or nanocrystalline apatites during the synthesis. 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]…”

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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Section: Nanodimensional and Nanocrystalline Apatitesmentioning

confidence: 99%

Nanodimensional and Nanocrystalline Calcium Orthophosphates

Dorozhkin¹

2012

AJBE

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“…8), 9) In addition, nanometer-sized fine HA particles with high crystallinity could be synthesized by hydrothermal processing. 10)12) The synthesis of fine HA crystals is described as follows.…”

Section: Nano-sized Hydroxyapatite Single Crystalsmentioning

confidence: 99%

Tailored bioceramics of calcium phosphates for regenerative medicine

Ioku

2010

J. Ceram. Soc. Japan

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Calcium phosphate bioceramics, especially those in hydroxyapatite (HA) and ¢-tricalcium phosphate (¢-TCP), are leading candidates for scaffolds used in regenerative medicine for bone tissue. The precise control of chemical composition, pore structure, and crystal faces is important for both the tissue regeneration and bioresorption of the materials. The excellent characteristics of HA and ¢-TCP for cell activity could be shown by using transparent ceramics of HA and ¢-TCP. Both calcium phosphates prepared through hydrothermal processing composed of rod-shaped particles were compared to conventional materials prepared by sintering methods, and their superior properties for bone regeneration were demonstrated. The in vivo behavior of HA and ¢-TCP is discussed from the viewpoint of chemical dissolubility.

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“…13) Moreover, a few chemical compounds, chosen as modifiers, have been used in hydrothermal processing, which lead to the formation of apitates with various morphologies, such as nanorods, 8) whiskers, 14) platelets, 15) and powders. 16) Studies 17)21) show that the addition of organic surfactants, such as anionic starburst dendrimers and cetyltrimethylammonium bromide (CTAB), results in rod-like hydroxyapatite nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of hydroxyapatite nanoparticles with various counterions as templates

Wang

Weng

Wang

et al. 2010

J. Ceram. Soc. Japan

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Hydrothermal synthesis proves to be a feasible route to fabricate hydroxyapatite nanoparticles. The study reports the combinational effects of temperature and various counterions, such as SO 4 2¹, Cl ¹ , and K + , on the morphology of hydroxyapatite nanoparticles. The resultant nanoparticles are investigated using powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The results show that the effects of temperature and different counterions are significant, and hydroxyapatite nanoparticles with the morphology of nano-platelet and nano-rod are produced without the addition of any organic surfactants. The process described will be beneficial to industry by lowering production costs, and contributing to ever increasing need to eliminate contamination to environment.

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Hydrothermal preparation of fibrous apatite and apatite sheet

Cited by 99 publications

References 4 publications

Nanodimensional and Nanocrystalline Calcium Orthophosphates

Nanodimensional and Nanocrystalline Calcium Orthophosphates

Tailored bioceramics of calcium phosphates for regenerative medicine

Hydrothermal synthesis of hydroxyapatite nanoparticles with various counterions as templates

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