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

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Bergvinsson, HalldorLund University,Lunds universitet,Ortopedi, Lund,Sektion III,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Orthopaedics (Lund),Section III,Department of Clinical Sciences, Lund,Faculty of Medicine,Skåne University Hospital (author)

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

Article/chapterEnglish2021

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2021-06-18
Medical Journals Sweden AB,2021

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LIBRIS-ID:oai:lup.lub.lu.se:9777bd29-630f-4d09-80d3-760dde8f401c
https://lup.lub.lu.se/record/9777bd29-630f-4d09-80d3-760dde8f401cURI
https://doi.org/10.1080/17453674.2021.1932140DOI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

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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.

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Ortopedi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Orthopaedics hsv//eng

Added entries (persons, corporate bodies, meetings, titles ...)

Zampelis, VasilisLund University,Lunds universitet,Ortopedi, Lund,Sektion III,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Orthopaedics (Lund),Section III,Department of Clinical Sciences, Lund,Faculty of Medicine,Skåne University Hospital(Swepub:lu)med-vzp (author)
Sundberg, MartinLund University,Lunds universitet,Ortopedi, Lund,Sektion III,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Orthopaedics (Lund),Section III,Department of Clinical Sciences, Lund,Faculty of Medicine,Skåne University Hospital(Swepub:lu)med-msu (author)
Flivik, GunnarLund University,Lunds universitet,Ortopedi, Lund,Sektion III,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Orthopaedics (Lund),Section III,Department of Clinical Sciences, Lund,Faculty of Medicine,Skåne University Hospital(Swepub:lu)ort-gfl (author)
Ortopedi, LundSektion III (creator_code:org_t)

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In:Acta Orthopaedica: Medical Journals Sweden AB92:5, s. 568-5741745-36741745-3682

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