Synthesis of biomaterial thin films by pulsed laser technologies: Electrochemical evaluation of bioactive glass-based nanocomposite coatings for biomedical applications

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• 作者：L. Floroian^a ; ^{lauraf@unitbv.ro} ; M. Florescu^a ; ^{florescum@unitbv.ro} ; F. Sima^b ; ^{felix.sima@inflpr.ro} ; G. Popescu-Pelin^b ; ^{gianina.popescu@inflpr.ro} ; C. Ristoscu^b ; ^{carmen.ristoscu@inflpr.ro} ; I.N. Mihailescu^b ; ^{ion.mihailescu@inflpr.ro}
• 关键词：Bioactive and anticorrosive coatings ; Composite bioactive glass&ndash ; polymer thin layers ; Electrochemical impedance spectroscopy
• 刊名：Materials Science and Engineering ; C
• 出版年：2012
• 期刊代码：63_09284931
• 类别：ms
• 出版时间：1 July, 2012
• 卷：32
• 期：5
• 页码：1152-1157
• 文件大小：606 K

摘要

The surface of biomedical titanium implants has been covered with thin films of bioactive glass and bioactive glass + poly(methyl methacrylate nanocomposite) in order to increase the resistance to corrosion and improve the bioactivity of their area in contact with bone tissue. To this purpose Pulsed Laser Deposition and Matrix Assisted Pulsed Laser Evaporation with an excimer laser source have been applied.

The layer assessments under conditions that simulate their biological interaction with the human body fluids and resistance to degradation have been studied by electrochemical polarization and electrochemical impedance spectroscopy. The poly(methyl methacrylate) addition to bioglass has reduced the bone ability to bond but resulted in a significant increase of the shielding efficiency against corrosion of the applied coatings.

The obtained results support the application of bioactive glass and composite bioactive glass + poly(methyl methacrylate) coatings for the development of advanced highly stable implants and prostheses that cannot be affected by corrosion.