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Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode

Constrained acetabular liners have been developed for patients who are at high risk for dislocation or who are undergoing revision surgery for recurrent dislocations. We report on 2 cases of failure of tripolar constrained liners due to severe backside polyethylene wear after dissociation of the out...

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Autores principales: Jones, Christopher W., Malahias, Michael-Alexander, Baral, Elexis, Wright, Timothy, Sculco, Thomas P., Sculco, Peter K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6123236/
https://www.ncbi.nlm.nih.gov/pubmed/30186903
http://dx.doi.org/10.1016/j.artd.2018.04.002
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author Jones, Christopher W.
Malahias, Michael-Alexander
Baral, Elexis
Wright, Timothy
Sculco, Thomas P.
Sculco, Peter K.
author_facet Jones, Christopher W.
Malahias, Michael-Alexander
Baral, Elexis
Wright, Timothy
Sculco, Thomas P.
Sculco, Peter K.
author_sort Jones, Christopher W.
collection PubMed
description Constrained acetabular liners have been developed for patients who are at high risk for dislocation or who are undergoing revision surgery for recurrent dislocations. We report on 2 cases of failure of tripolar constrained liners due to severe backside polyethylene wear after dissociation of the outer polyethylene liner without dislocation, a mode of failure not previously reported. The backside of the inserts suffered severe polyethylene deformation, wear, and scratching due to dissociation from the locking mechanism. In patients with tripolar constrained liners, radiographic evidence of eccentric wear should be considered as possible occult dissociation of the polyethylene liner within the shell. Conversion to a modular dual mobility liner appears to be a viable solution in this setting.
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spelling pubmed-61232362018-09-05 Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode Jones, Christopher W. Malahias, Michael-Alexander Baral, Elexis Wright, Timothy Sculco, Thomas P. Sculco, Peter K. Arthroplast Today Case Report Constrained acetabular liners have been developed for patients who are at high risk for dislocation or who are undergoing revision surgery for recurrent dislocations. We report on 2 cases of failure of tripolar constrained liners due to severe backside polyethylene wear after dissociation of the outer polyethylene liner without dislocation, a mode of failure not previously reported. The backside of the inserts suffered severe polyethylene deformation, wear, and scratching due to dissociation from the locking mechanism. In patients with tripolar constrained liners, radiographic evidence of eccentric wear should be considered as possible occult dissociation of the polyethylene liner within the shell. Conversion to a modular dual mobility liner appears to be a viable solution in this setting. Elsevier 2018-05-18 /pmc/articles/PMC6123236/ /pubmed/30186903 http://dx.doi.org/10.1016/j.artd.2018.04.002 Text en © 2018 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
Jones, Christopher W.
Malahias, Michael-Alexander
Baral, Elexis
Wright, Timothy
Sculco, Thomas P.
Sculco, Peter K.
Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode
title Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode
title_full Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode
title_fullStr Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode
title_full_unstemmed Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode
title_short Catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode
title_sort catastrophic failure of tripolar constrained liners due to backside wear: a novel failure mode
topic Case Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6123236/
https://www.ncbi.nlm.nih.gov/pubmed/30186903
http://dx.doi.org/10.1016/j.artd.2018.04.002
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