Highly cross-linked polyethylene still outperforms conventional polyethylene in THA : 10-year RSA results
(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)
- author
- Bergvinsson, Halldor LU ; Zampelis, Vasilis LU ; Sundberg, Martin LU and Flivik, Gunnar LU
- organization
- publishing date
- 2021
- 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}}, }