Journal ArticleDOI
Electrophoretic deposition of silicon substituted hydroxyapatite coatings from n-butanol–chloroform mixture
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TLDR
After immersion in simulated body fluid for 7 days, Si-HA coatings have the ability to induce the bone-like apatite formation and to improve the shear strength of the coatings.Abstract:
Silicon Substituted Hydroxyapatite (Si-HA) coatings were prepared on titanium substrates by electrophoretic deposition (EPD). The stability of Si-HA suspension in n-butanol and chloroform mixture has been studied by electricity conductivity and sedimentation test. The microstructure, shear strength and bioactivity in vitro has been tested. The stability of Si-HA suspension containing n-butanol and chloroform mixture as medium is better than that of pure n-butanol as medium. The good adhesion of the particles with the substrate and good cohesion between the particles were obtained in n-butanol and chloroform mixture. Adding triethanolamine (TEA) as additive into the suspension is in favor of the formation of uniform and compact Si-HA coatings on the titanium substrates by EPD. The shear strength of the coatings can reach 20.43 MPa after sintering at 700 °C for 2 h, when the volume ratio of n-butanol: chloroform is 2:1 and the concentration of TEA is 15 ml/L. Titanium substrates etched in H2O2/NH3 solution help to improve the shear strength of the coatings. After immersion in simulated body fluid for 7 days, Si-HA coatings have the ability to induce the bone-like apatite formation.read more
Citations
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Journal ArticleDOI
Electrophoretic deposition of biomaterials
TL;DR: How EPD has become an important tool in advanced biomaterials processing, as a convenient alternative to conventional methods, and the potential of the technique to manipulate and control the deposition of a range of nanomaterials of interest in the biomedical and biotechnology fields are presented.
Journal ArticleDOI
Accurate characterization of pure silicon-substituted hydroxyapatite powders synthesized by a new precipitation route
David Marchat,Maria Zymelka,Cristina Coelho,Laurent Gremillard,Lucile Joly-Pottuz,Florence Babonneau,Claude Esnouf,Jérôme Chevalier,Didier Bernache-Assollant +8 more
TL;DR: The results, particularly those from infrared spectroscopy, raise serious reservations about the phase purity of previously prepared and biologically evaluated SiHA powders, pellets and scaffolds in the literature.
Journal ArticleDOI
In-vitro bioactivity, biocorrosion and antibacterial activity of silicon integrated hydroxyapatite/chitosan composite coating on 316 L stainless steel implants.
TL;DR: The testing of SH/CTS nanocomposites with gram-positive and gram-negative bacterial strains confirms that the antibacterial ability improves with the higher substitution of Si, and indicates the long-term biostability of SH composite-coated ceramics in vitro than the 0 wt% SH/ CTS.
Journal ArticleDOI
Electrophoretic deposition of hydroxyapatite coatings on titanium from dimethylformamide suspensions
TL;DR: In this paper, the effect of applied voltage and deposition time on deposition rate, deposition thickness and coating morphology were studied, and the crystalline phase of HA before and after electrophoretic deposition was examined using X-ray diffraction.
Journal ArticleDOI
Aerosol deposition of silicon-substituted hydroxyapatite coatings for biomedical applications
Byung-Dong Hahn,Jeong-Min Lee,Dong-Soo Park,Jong-Jin Choi,Jungho Ryu,Woon-Ha Yoon,Byoung-Kuk Lee,Du-Sik Shin,Hyoun-Ee Kim +8 more
TL;DR: In this article, a single-phase Si-HA was obtained without any secondary phases such as α- or β-tricalcium phosphate for both the powders and the coatings.
References
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Journal ArticleDOI
How useful is SBF in predicting in vivo bone bioactivity
Tadashi Kokubo,Hiroaki Takadama +1 more
TL;DR: Examination of apatite formation on a material in SBF is useful for predicting the in vivo bone bioactivity of a material, and the number of animals used in and the duration of animal experiments can be reduced remarkably by using this method.
Journal ArticleDOI
Silicon: A Possible Factor in Bone Calcification
TL;DR: Silicon, a relatively unknown trace element in nutritional research, has been uniquely localized in active calcification sites in young bone and is suggested to be associated with calcium in an early stage of calcification.
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A comparative study on the in vivo behavior of hydroxyapatite and silicon substituted hydroxyapatite granules
Nelesh Patel,Serena M. Best,William Bonfield,Iain R. Gibson,Karin A. Hing,Elsie Damien,Paula A. Revell +6 more
TL;DR: The findings indicate that the early in vivo bioactivity of hydroxyapatite was significantly improved with the incorporation of silicate ions into the HA structure, making SiHA an attractive alternative to conventional HA materials for use as bone substitute ceramics.
Journal ArticleDOI
Synthesis of Si, Mg substituted hydroxyapatites and their sintering behaviors
TL;DR: It is observed that ion substitutions by an amount higher than the above ratios for each hydroxyapatite lead to destabilization of original structures of the hydroxyAPatite and to the production of tricalcium phosphate and calcium phosphate silicate phases when the samples were sintered at 1100 degrees C or higher.