Hydroxyapatite Formation and Protein Absorption on Triethyl Phosphate Modified Titanium Surface

N. Wu; Jie Weng; Shu Xin Qu; Jian Xin Wang; Xiong Lu; Bo Feng

doi:10.4028/www.scientific.net/AMR.26-28.797

Paper Titles

Effect of Second Phase Particles on Phase Stability of Zirconia in Hot Water
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Effects of Additional Elements on Structure, Mechanical Strength and Chemical Properties of Ni-Free Ti-Based Bulk Metallic Glasses for Biomaterials
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Effect of Thermo-Mechanical Processing on Texture and Elastic Modulus of Ti-Nb-Si Alloys for Biomedical Application
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Configuration Optimization of Truss Structures Using Harmony Search Heuristic Algorithm
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Hydroxyapatite Formation and Protein Absorption on Triethyl Phosphate Modified Titanium Surface
p.797

Preparation of Silicon-Containing Apatite Coating on Titanium
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Ball-Like Carbon Deposits Synthesized by Catalytic Combustion
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Raman Spectroscopic Characterization for Carbon Nanofibers Produced by Using Ferric Chloride of Different Concentration as Catalyst Precursor
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Electrochemical Properties of TiN and ZrN Coated Ti-Hf Alloy
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Hydroxyapatite Formation and Protein Absorption on Triethyl Phosphate Modified Titanium Surface

Abstract:

In this work, triethyl phosphate (TEP) was used to bioactivating titanium. Titanium plates grafted with TEP were immersed in a two times concentrated simulated body fluid (2SBF) to investigate deposition of hydoxyapatite (HA) on the surface. A phosphate buffer solution (PBS) with bovine serum albumin (BSA) was used to evaluate adsorption of protein on the grafted titanium surface. The morphology, component and structure of samples were examined by scanning electronic microscopy, attenuated total reflection Fourier transform infrared spectroscopy and X-ray diffraction respectively. The concentration change of BSA in adsorption test was examined with the ultraviolet-visible absorption spectra (UV). The analyses showed that TEP grafted onto the titanium surface. In 2SBF, calcium and phosphate ions deposited spontaneously onto the grafted titanium surface and formed a HA coating with a network-like microporous structure after being immersed for 3 days. The coating consisted of HA particles with 180-265nm in thickness and 72-85nm in width. The diameter of the micropores was about 200nm. The HA coating appeared better uniformity than that on the modified titanium using phosphoric acid. BSA rapidly adsorbed onto the grafted titanium surface at first half an hour and then the adsorption quantity almost kept constant. These results indicate that TEP grafting is an effective approach to modify bioactivity of titanium.