Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

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

Bergvinsson, Halldor LU orcid ; Zampelis, Vasilis LU ; Sundberg, Martin LU orcid and Flivik, Gunnar LU (2021) In Acta Orthopaedica 92(5). p.568-574
Abstract

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... (More)

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.

(Less)
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Orthopaedica
volume
92
issue
5
pages
568 - 574
publisher
Taylor & Francis
external identifiers
  • scopus:85108226946
  • pmid:34139928
ISSN
1745-3674
DOI
10.1080/17453674.2021.1932140
language
English
LU publication?
yes
id
9777bd29-630f-4d09-80d3-760dde8f401c
date added to LUP
2021-07-13 13:40:34
date last changed
2024-06-15 13:28:48
@article{9777bd29-630f-4d09-80d3-760dde8f401c,
  abstract     = {{<p>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.</p>}},
  author       = {{Bergvinsson, Halldor and Zampelis, Vasilis and Sundberg, Martin and Flivik, Gunnar}},
  issn         = {{1745-3674}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{568--574}},
  publisher    = {{Taylor & Francis}},
  series       = {{Acta Orthopaedica}},
  title        = {{Highly cross-linked polyethylene still outperforms conventional polyethylene in THA : 10-year RSA results}},
  url          = {{http://dx.doi.org/10.1080/17453674.2021.1932140}},
  doi          = {{10.1080/17453674.2021.1932140}},
  volume       = {{92}},
  year         = {{2021}},
}