Hydroxyapatite coating on magnesium with MgF 2 interlayer for enhanced corrosion resistance and biocompatibility

Ji Hoon Jo, Bong Gyu Kang, Kwang Seon Shin, Hyoun Ee Kim, Byung Dong Hahn, Dong Soo Park, Young Hag Koh

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Hydroxyapatite (HA) was coated onto pure magnesium (Mg) with an MgF 2 interlayer in order to reduce the surface corrosion rate and enhance the biocompatibility. Both MgF 2 and HA were successfully coated in sequence with good adhesion properties using the fluoride conversion coating and aerosol deposition techniques, respectively. In a simulated body fluid (SBF), the double layer coating remarkably enhanced the corrosion resistance of the coated Mg specimen. The in vitro cellular responses of the MC3T3-E1 pre-osteoblasts were examined using a cell proliferation assay and an alkaline phosphatase (ALP) assay, and these results demonstrated that the double coating layer also enhanced cell proliferation and differentiation levels. In the in vivo study, the HA/MgF 2 coated Mg corroded less than the bare Mg and had a higher bone-to-implant contact (BIC) ratio in the cortical bone area of the rabbit femora 4 weeks after implantation. These in vitro and in vivo results suggested that the HA coated Mg with the MgF 2 interlayer could be used as a potential candidate for biodegradable implant materials.

Original languageEnglish
Pages (from-to)2437-2447
Number of pages11
JournalJournal of Materials Science: Materials in Medicine
Volume22
Issue number11
DOIs
Publication statusPublished - 2011 Nov

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering
  • Biomaterials
  • Biomedical Engineering

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