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Fatigue fracture of a cemented Omnifit CoCr femoral stem: implant and failure analysis

A cemented, cast CoCr alloy, Omnifit Plus femoral stem was retrieved following mid-stem fracture after 24 years in vivo. The patient was an active 55-year-old male with a high body mass index (31.3) and no traumatic incidents before stem fracture. Fractographic and fatigue-based failure analyses wer...

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Autores principales: Bonnheim, Noah, Gramling, Hannah, Ries, Michael, Shukla, Sanjai, Iliescu, Beatrice, Pruitt, Lisa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5712028/
https://www.ncbi.nlm.nih.gov/pubmed/29204487
http://dx.doi.org/10.1016/j.artd.2017.06.005
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author Bonnheim, Noah
Gramling, Hannah
Ries, Michael
Shukla, Sanjai
Iliescu, Beatrice
Pruitt, Lisa
author_facet Bonnheim, Noah
Gramling, Hannah
Ries, Michael
Shukla, Sanjai
Iliescu, Beatrice
Pruitt, Lisa
author_sort Bonnheim, Noah
collection PubMed
description A cemented, cast CoCr alloy, Omnifit Plus femoral stem was retrieved following mid-stem fracture after 24 years in vivo. The patient was an active 55-year-old male with a high body mass index (31.3) and no traumatic incidents before stem fracture. Fractographic and fatigue-based failure analyses were performed to illuminate the etiology of fracture and retrospectively predict the device lifetime. The fracture surfaces show evidence of a coarse grain microstructure, intergranular fracture, and regions of porosity. The failure analysis suggests that stems with similar metallurgical characteristics, biomechanical environments, and in vivo durations may be abutting their functioning lifetimes, raising the possibility of an increased revision burden.
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spelling pubmed-57120282017-12-04 Fatigue fracture of a cemented Omnifit CoCr femoral stem: implant and failure analysis Bonnheim, Noah Gramling, Hannah Ries, Michael Shukla, Sanjai Iliescu, Beatrice Pruitt, Lisa Arthroplast Today Case Report A cemented, cast CoCr alloy, Omnifit Plus femoral stem was retrieved following mid-stem fracture after 24 years in vivo. The patient was an active 55-year-old male with a high body mass index (31.3) and no traumatic incidents before stem fracture. Fractographic and fatigue-based failure analyses were performed to illuminate the etiology of fracture and retrospectively predict the device lifetime. The fracture surfaces show evidence of a coarse grain microstructure, intergranular fracture, and regions of porosity. The failure analysis suggests that stems with similar metallurgical characteristics, biomechanical environments, and in vivo durations may be abutting their functioning lifetimes, raising the possibility of an increased revision burden. Elsevier 2017-08-02 /pmc/articles/PMC5712028/ /pubmed/29204487 http://dx.doi.org/10.1016/j.artd.2017.06.005 Text en © 2017 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Case Report
Bonnheim, Noah
Gramling, Hannah
Ries, Michael
Shukla, Sanjai
Iliescu, Beatrice
Pruitt, Lisa
Fatigue fracture of a cemented Omnifit CoCr femoral stem: implant and failure analysis
title Fatigue fracture of a cemented Omnifit CoCr femoral stem: implant and failure analysis
title_full Fatigue fracture of a cemented Omnifit CoCr femoral stem: implant and failure analysis
title_fullStr Fatigue fracture of a cemented Omnifit CoCr femoral stem: implant and failure analysis
title_full_unstemmed Fatigue fracture of a cemented Omnifit CoCr femoral stem: implant and failure analysis
title_short Fatigue fracture of a cemented Omnifit CoCr femoral stem: implant and failure analysis
title_sort fatigue fracture of a cemented omnifit cocr femoral stem: implant and failure analysis
topic Case Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5712028/
https://www.ncbi.nlm.nih.gov/pubmed/29204487
http://dx.doi.org/10.1016/j.artd.2017.06.005
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