Influence of Different Sterilization Methods on the Surface Chemistry and Electrochemical Behavior of Biomedical Alloys
Sterilization is a prerequisite for biomedical devices before contacting the human body. It guarantees the lack of infection by eliminating microorganisms (i.e., bacteria, spores and fungi). It constitutes the last fabrication process of a biomedical device. The aim of this paper is to understand th...
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MDPI AG
2023-06-01
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| Series: | Bioengineering |
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| Online Access: | https://www.mdpi.com/2306-5354/10/7/749 |
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| author | Anna Igual-Munoz Jean-Ludovic Genilloud Brigitte M. Jolles Stefano Mischler |
| author_facet | Anna Igual-Munoz Jean-Ludovic Genilloud Brigitte M. Jolles Stefano Mischler |
| author_sort | Anna Igual-Munoz |
| collection | DOAJ |
| description | Sterilization is a prerequisite for biomedical devices before contacting the human body. It guarantees the lack of infection by eliminating microorganisms (i.e., bacteria, spores and fungi). It constitutes the last fabrication process of a biomedical device. The aim of this paper is to understand the effect of different sterilization methods (ethanol-EtOH, autoclave-AC, autoclave + ultraviolet radiation-ACUV and gamma irradiation-G) on the surface chemistry and electrochemical reactivity (with special attention on the kinetics of the oxygen reduction reaction) of CoCrMo and titanium biomedical alloys used as prosthetic materials. To do that, electrochemical measurements (open circuit potential, polarization resistance, cathodic potentiodynamic polarization and electrochemical impedance spectroscopy) and surface analyses (Auger Electron Spectroscopy) of the sterilized surfaces were carried out. The obtained results show that the effect of sterilization on the corrosion behavior of biomedical alloys is material-dependent: for CoCrMo alloys, autoclave treatment increases the thickness and the chromium content of the passive film increasing its corrosion resistance compared to simple sterilization in EtOH, while in titanium and its alloys, autoclave and UV-light accelerates its corrosion rate by accelerating the kinetics of oxygen reduction. |
| first_indexed | 2024-03-11T01:17:37Z |
| format | Article |
| id | doaj.art-6fa3b7444fcd492abe48d00aaa3a0c0a |
| institution | Directory Open Access Journal |
| issn | 2306-5354 |
| language | English |
| last_indexed | 2024-03-11T01:17:37Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Bioengineering |
| spelling | doaj.art-6fa3b7444fcd492abe48d00aaa3a0c0a2023-11-18T18:20:49ZengMDPI AGBioengineering2306-53542023-06-0110774910.3390/bioengineering10070749Influence of Different Sterilization Methods on the Surface Chemistry and Electrochemical Behavior of Biomedical AlloysAnna Igual-Munoz0Jean-Ludovic Genilloud1Brigitte M. Jolles2Stefano Mischler3Tribology and Interfacial Chemistry Group, Institut des Matériaux, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, SwitzerlandTribology and Interfacial Chemistry Group, Institut des Matériaux, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, SwitzerlandSwiss BioMotion Laboratory, Lausanne University Hospital and University of Lausanne (CHUV-UNIL), CH-1011 Lausanne, SwitzerlandTribology and Interfacial Chemistry Group, Institut des Matériaux, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, SwitzerlandSterilization is a prerequisite for biomedical devices before contacting the human body. It guarantees the lack of infection by eliminating microorganisms (i.e., bacteria, spores and fungi). It constitutes the last fabrication process of a biomedical device. The aim of this paper is to understand the effect of different sterilization methods (ethanol-EtOH, autoclave-AC, autoclave + ultraviolet radiation-ACUV and gamma irradiation-G) on the surface chemistry and electrochemical reactivity (with special attention on the kinetics of the oxygen reduction reaction) of CoCrMo and titanium biomedical alloys used as prosthetic materials. To do that, electrochemical measurements (open circuit potential, polarization resistance, cathodic potentiodynamic polarization and electrochemical impedance spectroscopy) and surface analyses (Auger Electron Spectroscopy) of the sterilized surfaces were carried out. The obtained results show that the effect of sterilization on the corrosion behavior of biomedical alloys is material-dependent: for CoCrMo alloys, autoclave treatment increases the thickness and the chromium content of the passive film increasing its corrosion resistance compared to simple sterilization in EtOH, while in titanium and its alloys, autoclave and UV-light accelerates its corrosion rate by accelerating the kinetics of oxygen reduction.https://www.mdpi.com/2306-5354/10/7/749sterilizationbiomedical alloyscorrosion |
| spellingShingle | Anna Igual-Munoz Jean-Ludovic Genilloud Brigitte M. Jolles Stefano Mischler Influence of Different Sterilization Methods on the Surface Chemistry and Electrochemical Behavior of Biomedical Alloys Bioengineering sterilization biomedical alloys corrosion |
| title | Influence of Different Sterilization Methods on the Surface Chemistry and Electrochemical Behavior of Biomedical Alloys |
| title_full | Influence of Different Sterilization Methods on the Surface Chemistry and Electrochemical Behavior of Biomedical Alloys |
| title_fullStr | Influence of Different Sterilization Methods on the Surface Chemistry and Electrochemical Behavior of Biomedical Alloys |
| title_full_unstemmed | Influence of Different Sterilization Methods on the Surface Chemistry and Electrochemical Behavior of Biomedical Alloys |
| title_short | Influence of Different Sterilization Methods on the Surface Chemistry and Electrochemical Behavior of Biomedical Alloys |
| title_sort | influence of different sterilization methods on the surface chemistry and electrochemical behavior of biomedical alloys |
| topic | sterilization biomedical alloys corrosion |
| url | https://www.mdpi.com/2306-5354/10/7/749 |
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