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1.
Journal of Biomedical Engineering ; (6): 783-786, 2009.
Artigo em Chinês | WPRIM | ID: wpr-294570

RESUMO

The sectional test was adopted in this study to investigate the corrosion of pure iron in 0.15 mol/L NaCl solution, Ringer solution, PBS(-) solution, SBF solution and M199 cell culture medium at three different times. The result shows that different mediums have different corrosion effects on pure iron. The arrangement according to the medium's corrosion ability from the strongest to weakest is 0.15 mol/L NaCl solution (Ringer solution), PBS(-) solution, SBF solution and M199 cell culture medium. The results of scanning electron microscopy and energy dispersive X-ray spectrum analyses show that the addition of HPO4(2-), H2POC4-, Ca2+, Mg2+, SO4(2-) and the organic component can inhibit the corrosion to some degree.


Assuntos
Materiais Biocompatíveis , Química , Líquidos Corporais , Metabolismo , Corrosão , Ferro , Química , Soluções Isotônicas , Química , Teste de Materiais , Cloreto de Sódio , Química
2.
Journal of Biomedical Engineering ; (6): 437-451, 2009.
Artigo em Chinês | WPRIM | ID: wpr-280182

RESUMO

Magnesium is a macroelement which is indispensable to human bodies. As a lightweight metal with high specific strength and favorable biocompatibility, magnesium and its alloys have been introduced in the field of biomedical materials research and have a broad application prospect. It is possible to develop new type of biodegradable medical magnesium alloys by use of the poor corrosion resistance of magnesium. Bioabsorbable magnesium stents implanted in vivo could mechanically support the vessel in a short term, effectly prevent the acute coronary occlusion and in-stent restenosis, and then be gradully biodegraded and completely absorbed in a long term. Osteoconductive bioactivity in magnesium-based alloys could promote the apposition growth of bone tissue. This paper reviews the progress of magnesium and its alloys applied in bone tissue and cardiovascular stents, and the prospect of the future research of magnesium-based biomaterials is discussed.


Assuntos
Humanos , Implantes Absorvíveis , Ligas , Química , Metabolismo , Materiais Biocompatíveis , Química , Substitutos Ósseos , Química , Metabolismo , Magnésio , Química , Metabolismo , Stents
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