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Polyethylene thickness is a risk factor for wear necessitating insert exchange

PURPOSE: The aim of this observational study was to investigate the optimal minimal polyethylene (PE) thickness in total knee arthroplasty (TKA) and identify other risk factors associated with revision of the insert due to wear. METHODS: A total of 84 TKA were followed for 11–16 years. All patients...

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Autores principales: Pijls, Bart G., Van der Linden-Van der Zwaag, Henrica M. J., Nelissen, Rob G. H. H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer-Verlag 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3353090/
https://www.ncbi.nlm.nih.gov/pubmed/22105569
http://dx.doi.org/10.1007/s00264-011-1412-6
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author Pijls, Bart G.
Van der Linden-Van der Zwaag, Henrica M. J.
Nelissen, Rob G. H. H.
author_facet Pijls, Bart G.
Van der Linden-Van der Zwaag, Henrica M. J.
Nelissen, Rob G. H. H.
author_sort Pijls, Bart G.
collection PubMed
description PURPOSE: The aim of this observational study was to investigate the optimal minimal polyethylene (PE) thickness in total knee arthroplasty (TKA) and identify other risk factors associated with revision of the insert due to wear. METHODS: A total of 84 TKA were followed for 11–16 years. All patients received the same prosthesis design (Interax; Howmedica/ Stryker) with halfbearings: separate PE-inserts medially and laterally. Statistical analysis comprised Cox-regression to correct for confounding. RESULTS: Eight knees (9.5%) had been revised due to thinning inserts and an additional patient is scheduled for revision. PE thickness, diagnosis, BMI and weight are risk factors for insert exchange. For each millimetre decrease in PE thickness, the risk of insert exchange increases 3.0 times, which remains after correction for age, gender, weight, diagnosis and femoral-tibial angle. Insert exchange was 4.73 times more likely in OA-patients compared to RA-patients. For every unit increase in BMI and weight the risk for insert exchange increases 1.40 times and 1.14 times, respectively. CONCLUSIONS: In conclusion we therefore advise against the use of thin PE inserts in modular TKA and recommend PE inserts with a minimal 8-mm thickness.
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spelling pubmed-33530902012-06-07 Polyethylene thickness is a risk factor for wear necessitating insert exchange Pijls, Bart G. Van der Linden-Van der Zwaag, Henrica M. J. Nelissen, Rob G. H. H. Int Orthop Original Paper PURPOSE: The aim of this observational study was to investigate the optimal minimal polyethylene (PE) thickness in total knee arthroplasty (TKA) and identify other risk factors associated with revision of the insert due to wear. METHODS: A total of 84 TKA were followed for 11–16 years. All patients received the same prosthesis design (Interax; Howmedica/ Stryker) with halfbearings: separate PE-inserts medially and laterally. Statistical analysis comprised Cox-regression to correct for confounding. RESULTS: Eight knees (9.5%) had been revised due to thinning inserts and an additional patient is scheduled for revision. PE thickness, diagnosis, BMI and weight are risk factors for insert exchange. For each millimetre decrease in PE thickness, the risk of insert exchange increases 3.0 times, which remains after correction for age, gender, weight, diagnosis and femoral-tibial angle. Insert exchange was 4.73 times more likely in OA-patients compared to RA-patients. For every unit increase in BMI and weight the risk for insert exchange increases 1.40 times and 1.14 times, respectively. CONCLUSIONS: In conclusion we therefore advise against the use of thin PE inserts in modular TKA and recommend PE inserts with a minimal 8-mm thickness. Springer-Verlag 2011-11-22 2012-06 /pmc/articles/PMC3353090/ /pubmed/22105569 http://dx.doi.org/10.1007/s00264-011-1412-6 Text en © The Author(s) 2011 https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
spellingShingle Original Paper
Pijls, Bart G.
Van der Linden-Van der Zwaag, Henrica M. J.
Nelissen, Rob G. H. H.
Polyethylene thickness is a risk factor for wear necessitating insert exchange
title Polyethylene thickness is a risk factor for wear necessitating insert exchange
title_full Polyethylene thickness is a risk factor for wear necessitating insert exchange
title_fullStr Polyethylene thickness is a risk factor for wear necessitating insert exchange
title_full_unstemmed Polyethylene thickness is a risk factor for wear necessitating insert exchange
title_short Polyethylene thickness is a risk factor for wear necessitating insert exchange
title_sort polyethylene thickness is a risk factor for wear necessitating insert exchange
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3353090/
https://www.ncbi.nlm.nih.gov/pubmed/22105569
http://dx.doi.org/10.1007/s00264-011-1412-6
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