نتایج جستجو برای: hydroxy apatite

تعداد نتایج: 34746  

Journal: :Journal of Raman Spectroscopy 2022

Raman spectroscopy is widely used to examine the carbonate content within bone apatite, but spectra are also sensitive orientation effects between polarisation of incoming laser light and sample orientation. This may lead discrepancies when using evaluate as extent crystal organisation can change depending on type bone, age, presence mineralisation disorders in organism. It experimentally very ...

2014
Xiaojing Chen Xiaohui Chen Delia S. Brauer Rory M. Wilson Robert G. Hill Natalia Karpukhina

The bioactivity of a series of fluoride-containing sodium-free calcium and strontium phosphosilicate glasses has been tested in vitro. Glasses with high fluoride content were partially crystallised to apatite and other fluoride-containing phases. The bioactivity study was carried out in Tris and SBF buffers, and apatite formation was monitored by XRD, FTIR and solid state NMR. Ion release in so...

2013
N. Narayanan S. Daisy Chella Kumari V. Revathi

Water soluble polymers such as Hydroxy Propyl Methyl Cellulose (HPMC), Poly Vinyl Pyrrolidone (PVP), Carboxy Methyl Cellulose Sodium (CMC Na), and Methyl Cellulose as well as in combination of varying proportions are used in this study for the protective coating of Microcrystalline Hydroxy Apatite Complex (MCHC). The objective of this study was to investigate the effect of aqueous film coating ...

Journal: :Dental materials journal 2005
Akihiko Yuda Seiji Ban Yuichi Izumi

The hydrothermal-electrochemical method is best suited for producing homogeneous apatite coatings on electro-conductive materials with complicated shape, such as the mesh. This study was undertaken to examine the effect of the apatite coating prepared by this coating method on cell adhesion, proliferation, and differentiation of MC3T3-E1 cells in culture. The cells attached and spread well on t...

Journal: :Journal of materials science. Materials in medicine 2008
Jhamak Nourmohammadi S K Sadrnezhaad A Behnam Ghader

In this study, the apatite-forming ability of the new resin-modified glass-ionomer cement was evaluated by soaking the cement in the simulated body fluid. The Fourier Transform Infrared (FTIR) spectrometer and X-Ray Diffraction (XRD) patterns of the soaked cement pointed to the creation of poorly crystalline carbonated apatite. It was found that the releasing of calcium ions from the soaked cem...

Journal: :Dental materials journal 2013
Toshiki Miyazaki Akimasa Kuramoto Atsuhide Hirakawa Yuki Shirosaki Chikara Ohtsuki

Chemically synthesized collagen with a triple helix structure similar to that of natural collagen is attractive as a safe biomaterial. Hybrids of chemically synthesized collagen and apatite are proposed for novel bone substitutes. However their apatite-forming ability in simulated body fluid is still quite low. We examined acceleration of apatite formation on collagen by immobilized poly-γ-glut...

2015
Jianwei Wang

Materials with apatite crystal structure have a great potential for incorporating the long-lived radioactive iodine isotope (129I) in the form of iodide (I) from nuclear waste streams. Because of its durability and potentially high iodine content, the apatite waste form can reduce iodine release rate and minimize the waste volume. Crystal structure and composition of apatite (A5(XO4)3Z) was inv...

2014
Jong-Eun Won Ahmed El-Fiqi Seung-Hwan Jegal Cheol-Min Han Eun-Jung Lee Jonathan C Knowles Hae-Won Kim

Synthetic biopolymers are commonly used for the repair and regeneration of damaged tissues. Specifically targeting bone, the composite approach of utilizing inorganic components is considered promising in terms of improving mechanical and biological properties. We developed gelatin-apatite co-precipitates which mimic the native bone matrix composition within poly(lactide-co-caprolactone) (PLCL)...

Journal: :Bio-medical materials and engineering 2013
Toshiki Miyazaki Juntarou Mukai Eiichi Ishida Chikara Ohtsuki

Apatite-polymer composites mimicking specific structure of natural bone are promised as bone substitutes with moderate flexibility able to be fabricated into desired shapes as well as bone-bonding bioactivity. In order to precipitate the apatite on polymer surfaces, aqueous processing using solution supersaturated to the apatite has been attracting as much attention. Polyglutamic acid (PGA) is ...

2016
Bahram Ranjkesh Jacques Chevallier Hamideh Salehi Frédéric Cuisinier Flemming Isidor Henrik Løvschall

Aim: Calcium silicate cements are widely used in endodontics. Novel fast-setting calcium silicate cement with fluoride (Protooth) has been developed for potential applications in teeth crowns including cavity lining and cementation. Objective: To evaluate the surface apatite-forming ability of Protooth compositions as a function of fluoride content and immersion time in phosphate-buffered salin...

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