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Highly cross-linked polyethylene still outperforms conventional polyethylene in THA: 10-year RSA results

Background and purpose — Cup wear in total hip arthroplasty (THA) can be affected by different manufacturing processes of the polyethylene (PE). We report the long-term wear pattern differences, as well as early creep behavior, between conventional PE and highly cross-linked PE (HXLPE) liners, as me...

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Autores principales: Bergvinsson, Halldor, Zampelis, Vasilis, Sundberg, Martin, Flivik, Gunnar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8519538/
https://www.ncbi.nlm.nih.gov/pubmed/34139928
http://dx.doi.org/10.1080/17453674.2021.1932140
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author Bergvinsson, Halldor
Zampelis, Vasilis
Sundberg, Martin
Flivik, Gunnar
author_facet Bergvinsson, Halldor
Zampelis, Vasilis
Sundberg, Martin
Flivik, Gunnar
author_sort Bergvinsson, Halldor
collection PubMed
description Background and purpose — Cup wear in total hip arthroplasty (THA) can be affected by different manufacturing processes of the polyethylene (PE). We report the long-term wear pattern differences, as well as early creep behavior, between conventional PE and highly cross-linked PE (HXLPE) liners, as measured with radiostereometry (RSA) up to 10 years. We also compare migration and clinical outcome of 2 similar uncemented cups with different backside surface roughness. Patients and methods — We included 45 patients with primary osteoarthritis. 23 received a conventional liner and 22 an HXLPE liner in a similar uncemented cup, but with a slightly rougher surface. The patients were followed up with RSA and hip-specific outcome questionnaire (HOOS) at 3 months, 1, 2, 5, and 10 years. Results — During the first 3 months both liners showed expected deformation with mean proximal head penetration of 0.39 mm (conventional PE) and 0.21 mm (HXLPE). Between 3 months and 10 years there was a difference in annual wear with 0.12 mm/year for the conventional liner and 0.02 mm/year for the HXLPE liner. The cup with rougher surface had less initial migration but both types had stabilized after 3 months. The HOOS scores improved after surgery and remained high for both groups throughout the study period. Interpretation — Up to 10 years the HXLPE has consistent lower annual wear, possibly contributing to longer survival of the THA, compared with conventional PE. All patients reported good results regardless of liner type.
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spelling pubmed-85195382021-10-16 Highly cross-linked polyethylene still outperforms conventional polyethylene in THA: 10-year RSA results Bergvinsson, Halldor Zampelis, Vasilis Sundberg, Martin Flivik, Gunnar Acta Orthop Research Article Background and purpose — Cup wear in total hip arthroplasty (THA) can be affected by different manufacturing processes of the polyethylene (PE). We report the long-term wear pattern differences, as well as early creep behavior, between conventional PE and highly cross-linked PE (HXLPE) liners, as measured with radiostereometry (RSA) up to 10 years. We also compare migration and clinical outcome of 2 similar uncemented cups with different backside surface roughness. Patients and methods — We included 45 patients with primary osteoarthritis. 23 received a conventional liner and 22 an HXLPE liner in a similar uncemented cup, but with a slightly rougher surface. The patients were followed up with RSA and hip-specific outcome questionnaire (HOOS) at 3 months, 1, 2, 5, and 10 years. Results — During the first 3 months both liners showed expected deformation with mean proximal head penetration of 0.39 mm (conventional PE) and 0.21 mm (HXLPE). Between 3 months and 10 years there was a difference in annual wear with 0.12 mm/year for the conventional liner and 0.02 mm/year for the HXLPE liner. The cup with rougher surface had less initial migration but both types had stabilized after 3 months. The HOOS scores improved after surgery and remained high for both groups throughout the study period. Interpretation — Up to 10 years the HXLPE has consistent lower annual wear, possibly contributing to longer survival of the THA, compared with conventional PE. All patients reported good results regardless of liner type. Taylor & Francis 2021-06-18 /pmc/articles/PMC8519538/ /pubmed/34139928 http://dx.doi.org/10.1080/17453674.2021.1932140 Text en © 2021 The Author(s). Published by Taylor & Francis on behalf of the Nordic Orthopedic Federation. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Bergvinsson, Halldor
Zampelis, Vasilis
Sundberg, Martin
Flivik, Gunnar
Highly cross-linked polyethylene still outperforms conventional polyethylene in THA: 10-year RSA results
title Highly cross-linked polyethylene still outperforms conventional polyethylene in THA: 10-year RSA results
title_full Highly cross-linked polyethylene still outperforms conventional polyethylene in THA: 10-year RSA results
title_fullStr Highly cross-linked polyethylene still outperforms conventional polyethylene in THA: 10-year RSA results
title_full_unstemmed Highly cross-linked polyethylene still outperforms conventional polyethylene in THA: 10-year RSA results
title_short Highly cross-linked polyethylene still outperforms conventional polyethylene in THA: 10-year RSA results
title_sort highly cross-linked polyethylene still outperforms conventional polyethylene in tha: 10-year rsa results
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8519538/
https://www.ncbi.nlm.nih.gov/pubmed/34139928
http://dx.doi.org/10.1080/17453674.2021.1932140
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