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J Biomater Appl. 2014 Sep;29(3):321-8. doi: 10.1177/0885328214526765. Epub 2014 Mar 5.

In vitro apatite formation on porous anodic alumina induced by a phosphorylation treatment.

Author information

  • 1College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, P. R. China.
  • 2College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, P. R. China Department of Chemical Engineering, College of Engineering, Northeastern University, Boston, MA, USA synicn@dhu.edu.cn.
  • 3Department of Chemical Engineering, College of Engineering, Northeastern University, Boston, MA, USA Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia.

Abstract

In this study, a phosphorylation treatment of porous anodic alumina (PAA) was performed by wet impregnation in phosphoric acid and a subsequent heat treatment. The PAA and phosphorylated PAA specimens were analyzed using a field emission scanning electron microscope, an energy-dispersive X-ray spectrometer, and Fourier transform infrared spectroscopy. The apatite-forming ability of the phosphorylated PAA was evaluated by soaking the specimens in simulated body fluid for 1, 3, and 7 days. The surface microstructures and chemical property changes after soaking in simulated body fluid were again characterized by field emission scanning electron microscope, energy-dispersive X-ray spectrometer, and Fourier transform infrared spectroscopy. Results of this study demonstrated that the functional -PO4 groups introduced onto the PAA surface dramatically promoted the deposition of bone-like apatite on PAA. The results from this study indicated that the phosphorylation treatment of anodic alumina is an effective method for inducing bone-like apatite formation, and this phosphorylated PAA can be a promising candidate to be used as bioactive surface coatings on implant metals and alloys for orthopedic and dental applications.

© The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

KEYWORDS:

Porous anodic alumina; bioactive; bone-like apatite; functional groups; phosphorylation treatment

PMID:
24598060
[PubMed - indexed for MEDLINE]

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