The apatite-forming ability of titanium oxide film with different structures was investigated in a simulated body fluid(SBF).Three different structures of titanium oxide film were prepared.The dense rutile and amorpho...The apatite-forming ability of titanium oxide film with different structures was investigated in a simulated body fluid(SBF).Three different structures of titanium oxide film were prepared.The dense rutile and amorphous titania gel did not induce apatite formation on their surfaces in SBF solution in 48 hours,whereas the micro porous rutile structure induced apatite formation on their surfaces.This indicates that a specific structure of titania is effective in inducing apatite formation.Such specific structure was assumed in this study to be micro porous structure.The spatially sub micro-scale porous structure of titanium oxide film was an important factor to facilitate the Ca-P nucleation.展开更多
A composite gel composed of collagen,alginate and synthetic HA powder was formed by using collagen assembly,and freeze-drying of the composite gel gave rise to collagen-alginate-HA porous materials.Scanning electron m...A composite gel composed of collagen,alginate and synthetic HA powder was formed by using collagen assembly,and freeze-drying of the composite gel gave rise to collagen-alginate-HA porous materials.Scanning electron microscopy,X-ray diffraction,Fourier transform infrared spectroscopy and Ultra-violet spectroscopy were used to characterize the physiochemical properties of the prepared materials and to reveal the possible interactions between molecular species.The results indicated that the scaffolds had interconnected porous structure with typical pores ranging between 200-600μm.Inorganic phase,poorly crystallized hydroxyapatite,was formed uniform dispersion with the organic substances.The introduction of alginate,to some extent,influenced the collagen assembly process.The materials prepared in this study could be a promising scaffolds for bone tissue engineering.展开更多
文摘The apatite-forming ability of titanium oxide film with different structures was investigated in a simulated body fluid(SBF).Three different structures of titanium oxide film were prepared.The dense rutile and amorphous titania gel did not induce apatite formation on their surfaces in SBF solution in 48 hours,whereas the micro porous rutile structure induced apatite formation on their surfaces.This indicates that a specific structure of titania is effective in inducing apatite formation.Such specific structure was assumed in this study to be micro porous structure.The spatially sub micro-scale porous structure of titanium oxide film was an important factor to facilitate the Ca-P nucleation.
文摘A composite gel composed of collagen,alginate and synthetic HA powder was formed by using collagen assembly,and freeze-drying of the composite gel gave rise to collagen-alginate-HA porous materials.Scanning electron microscopy,X-ray diffraction,Fourier transform infrared spectroscopy and Ultra-violet spectroscopy were used to characterize the physiochemical properties of the prepared materials and to reveal the possible interactions between molecular species.The results indicated that the scaffolds had interconnected porous structure with typical pores ranging between 200-600μm.Inorganic phase,poorly crystallized hydroxyapatite,was formed uniform dispersion with the organic substances.The introduction of alginate,to some extent,influenced the collagen assembly process.The materials prepared in this study could be a promising scaffolds for bone tissue engineering.
