Document Detail


Chemical surface alteration of biodegradable magnesium exposed to corrosion media.
MedLine Citation:
PMID:  21382530     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The understanding of corrosion processes of metal implants in the human body is a key problem in modern biomaterial science. Because of the complicated and adjustable in vivo environment, in vitro experiments require the analysis of various physiological corrosion media to elucidate the underlying mechanism of "biological" metal surface modification. In this paper magnesium samples were incubated under cell culture conditions (i.e. including CO(2)) in electrolyte solutions and cell growth media, without and with proteins. Chemical mapping by high resolution electron-induced X-ray emission spectroscopy and infrared reflection microspectroscopy revealed a complex structure of the formed corrosion layer. The presence of CO(2) in concentrations close to that in blood is significant for the chemistry of the oxidized layer. The presence of proteins leads to a less dense but thicker passivation layer which is still ion and water permeable as osmolality and weight measurements indicate.
Authors:
Regine Willumeit; Janine Fischer; Frank Feyerabend; Norbert Hort; Ulrich Bismayer; Stefanie Heidrich; Boriana Mihailova
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-4
Journal Detail:
Title:  Acta biomaterialia     Volume:  -     ISSN:  1878-7568     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101233144     Medline TA:  Acta Biomater     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011. Published by Elsevier Ltd.
Affiliation:
Helmholtz-Zentrum Geesthacht, Institute for Materials Research, Max-Planck-Str.1, 21502 Geesthacht, Germany.
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