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Annals of Biomedical Engineering

, Volume 42, Issue 12, pp 2537–2550 | Cite as

Improvement of Biodegradability, Bioactivity, Mechanical Integrity and Cytocompatibility Behavior of Biodegradable Mg Based Orthopedic Implants Using Nanostructured Bredigite (Ca7MgSi4O16) Bioceramic Coated via ASD/EPD Technique

  • Mehdi Razavi
  • Mohammadhossein Fathi
  • Omid Savabi
  • Daryoosh Vashaee
  • Lobat TayebiEmail author
Article

Abstract

This research explored the influence of surface modification of AZ91 Mg alloy on the biodegradation, bioactivity, mechanical integrity and cytocompatibility of the alloy. For this purpose, a nanostructured bredigite (Ca7MgSi4O16) ceramic coating was prepared on biodegradable AZ91 Mg alloy through anodic spark deposition and electrophoretic deposition method. The phase composition and surface morphology of the coated alloy were characterized by X-ray diffraction, scanning electron microscope and transmission electron microscope. The properties of samples were investigated by electrochemical measurements, immersion test, compression examination and cell culturing. The results showed that the degradation resistance, bioactivity, mechanical integrity and cytocompatibility of biodegradable Mg alloy were improved by the anodic spark deposition and electrophorretic deposition of the nanostructured bredigite coating. Therefore, the nanostructured bredigite ceramic coating is identified as a good coating for AZ91 Mg alloy for the purpose of making biodegradable metallic orthopedic implants.

Keywords

Biomaterials Biodegradable Mg alloy Bredigite Coating Biomedical applications 

Notes

Acknowledgement

The authors are thankful for the contributions of Isfahan University of Technology, Torabinejad Dental Research Center. The work is partially supported by Oklahoma Center for Advancement of Science and Technology (Grant No. AR131-054 8161), AFOSR (Grant No. FA9550-10-1-0010) and the National Science Foundation (NSF, Grant No. 0933763).

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Copyright information

© Biomedical Engineering Society 2014

Authors and Affiliations

  • Mehdi Razavi
    • 1
    • 3
    • 4
    • 5
  • Mohammadhossein Fathi
    • 1
    • 2
  • Omid Savabi
    • 3
  • Daryoosh Vashaee
    • 5
  • Lobat Tayebi
    • 4
    • 6
    Email author
  1. 1.Biomaterials Research Group, Department of Materials EngineeringIsfahan University of TechnologyIsfahanIran
  2. 2.Dental Materials Research CenterIsfahan University of Medical SciencesIsfahanIran
  3. 3.Torabinejad Dental Research Center, School of DentistryIsfahan University of Medical SciencesIsfahanIran
  4. 4.School of Materials Science and Engineering, Helmerich Advanced Technology Research CenterOklahoma State UniversityTulsaUSA
  5. 5.School of Electrical and Computer Engineering, Helmerich Advanced Technology Research CenterOklahoma State UniversityTulsaUSA
  6. 6.School of Chemical EngineeringOklahoma State UniversityStillwaterUSA

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