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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad de Antioquia
2021
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| Online Access: | https://www.redalyc.org/articulo.oa?id=43068102004 https://www.redalyc.org/journal/430/43068102004/ https://www.redalyc.org/journal/430/43068102004/html/ https://www.redalyc.org/journal/430/43068102004/43068102004.epub https://www.redalyc.org/journal/430/43068102004/movil |
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Table of Contents:
- A comparative surface analysis of explanted hip joint prostheses made of different biomedical alloys Angela Bermúdez-Castañeda Johanna Esguerra Arce Adriana Esguerra-Arce Sofia Valentina Vargas-Pabón Juan Guillermo Ortiz-Martínez David Leonardo Blanco-Estupiñán Juan Guillermo Castaño Stefano Mischler Ingeniería wear corrosion tribocorrosion Retrieval explants modular hip joint implants The introduction of modular design in total hip arthroplasty has enabled the use of different materials in one single configuration and the adjustment of the prosthesis to the patient’s body, and facilitated medical revisions. However, modularity leads to the presence of new interfaces created between pieces in contact, raising the issue of degradation. Tribocorrosion phenomena have been identified as the main degradation mechanism due to the mechanical, chemical, and electrochemical conditions acting on the materials. In addition, conditions inside the human body are unclear, regarding electrochemical settings and the interaction between the electrochemical and mechanical action. This work is focused on the degradation of monopolar hip joint implants made from biomedical alloys such as stainless steel, Ti, and CoCr alloys. Three cases are presented and analyzed in terms of the degradation level along the trunnion length. Surface analysis done on a titanium trunnion showed a significant ploughing on the distal part, compared to what was found for stainless steel and cobalt-chromium alloys, which can produce a stuck in this area. Meanwhile, in the proximal part, wear debris is found, which suggests more movement in the internal part. Although few debris particles were identified in CoCr trunnion, a large amount of material inside the contact was observed. This could be related to the ploughing generated in the distal thread pattern, which allowed the material to come inside and outside the contact. 2021 artículo científico 0120-6230 https://www.redalyc.org/articulo.oa?id=43068102004 https://www.redalyc.org/journal/430/43068102004/ https://www.redalyc.org/journal/430/43068102004/html/ https://www.redalyc.org/journal/430/43068102004/43068102004.epub https://www.redalyc.org/journal/430/43068102004/movil 10.17533/udea.redin.20210320 en http://www.redalyc.org/revista.oa?id=430 Revista Facultad de Ingeniería Universidad de Antioquia application/pdf Universidad de Antioquia Revista Facultad de Ingeniería Universidad de Antioquia (Colombia) Num.100