The formation of an organic coat and the release of corrosion microparticles from metallic magnesium implants.
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Authors
Badar, MuhammadLünsdorf, Heinrich
Evertz, Florian
Rahim, Muhammad Imran
Glasmacher, Birgit
Hauser, Hansjörg
Mueller, Peter P
Issue Date
2013-07
Metadata
Show full item recordAbstract
Magnesium alloys have been proposed as prospective degradable implant materials. To elucidate the complex interactions between the corroding implants and the tissue, magnesium implants were analyzed in a mouse model and the response was compared to that induced by Ti and by the resorbable polymer polyglactin, respectively. One month after implantation, distinct traces of corrosion were apparent but the magnesium implants were still intact, whereas resorbable polymeric wound suture implants were already fragmented. Analysis of magnesium implants 2weeks after implantation by energy-dispersive X-ray spectroscopy indicated that magnesium, oxygen, calcium and phosphate were present at the implant surface. One month after implantation, the element composition of the outermost layer of the implant was indicative of tissue without detectable levels of magnesium, indicating a protective barrier function of this organic layer. In agreement with this notion, gene expression patterns in the surrounding tissue were highly similar for all implant materials investigated. However, high-resolution imaging using energy-filtered transmission electron microscopy revealed magnesium-containing microparticles in the tissue in the proximity of the implant. The release of such corrosion particles may contribute to the accumulation of calcium phosphate in the nearby tissue and to bone conductive activities of magnesium implants.Citation
The formation of an organic coat and the release of corrosion microparticles from metallic magnesium implants. 2013, 9 (7):7580-9 Acta BiomaterAffiliation
Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124 Braunschweig, Germany.Journal
Acta biomaterialiaPubMed ID
23518475Type
ArticleLanguage
enISSN
1878-7568ae974a485f413a2113503eed53cd6c53
10.1016/j.actbio.2013.03.012
Scopus Count
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