Surface characterization and cytotoxicity response of biodegradable magnesium alloys

Luis Pompa, Zia Ur Rahman, Edgar Munoz, Waseem Haider

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Magnesium alloys have raised an immense amount of interest to many researchers because of their evolution as a new kind of third generation materials. Due to their biocompatibility, density, and mechanical properties, magnesium alloys are frequently reported as prospective biodegradable implant materials. Moreover, magnesium alloys experience a natural phenomenon to biodegrade in aqueous solutions due to its corrosion activity, which is excellent for orthopedic and cardiovascular applications. However, a major concern with such alloys is fast and non-uniform corrosion degradation. Controlling the degradation rate in the physiological environment determines the success of biodegradable implants. In this investigation, three different grades of magnesium alloys: AZ31B, AZ91E and ZK60A were studied for their corrosion resistance and biocompatibility. Scanning electron microscopy, energy dispersive spectroscopy, atomic force microscopy and contact angle meter are used to study surface morphology, chemistry, roughness and wettability, respectively. Additionally, the cytotoxicity of the leached metal ions was evaluated by using a tetrazolium based bio-assay, MTS.

Original languageEnglish
Pages (from-to)761-768
Number of pages8
JournalMaterials Science and Engineering C
Volume49
DOIs
StatePublished - Apr 1 2015

Keywords

  • Biodegradable
  • Corrosion
  • Cytotoxicity
  • Magnesium
  • Surface treatment

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