Evidence map›Paper›PMID 33517823›Full record

ArticleActa orthopaedica2021

Implant survival of 2,723 vitamin E-infused highly crosslinked polyethylene liners in total hip arthroplasty: data from the Finnish Arthroplasty Register.

Matias Hemmilä, Inari Laaksonen, Markus Matilainen, Antti Eskelinen, Jaason Haapakoski, Ari-Pekka Puhto, Jukka Kettunen, Konsta Pamilo, Keijo T Mäkelä

Open access · goldAbstract read
In one paragraph

Article in Acta orthopaedica, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
2.7field-weighted citation impact, top 10% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 2 syntheses or guidelines pooled it, 17 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Observational
  5. Article
  6. Review
  7. Review
  8. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 6 institutions in 2 countries.

Matias HemmiläDepartment of Orthopaedic Surgery, University of Turku and Turku University Hospital, Turku.
Inari LaaksonenDepartment of Orthopaedic Surgery, University of Turku and Turku University Hospital, Turku.
Markus MatilainenTurku PET Centre, University of Turku and Turku University Hospital, Turku.
Antti EskelinenCoxa Hospital for Joint Replacement and Faculty of Medicine and Health Technologies, Tampere University, Tampere.
Jaason HaapakoskiNational Institute for Health and Welfare, Helsinki.
Ari-Pekka PuhtoDivision of Operative Care, Department of Orthopaedic and Trauma Surgery, Oulu University Hospital, Oulu.
Jukka KettunenDepartment of Orthopaedics and Traumatology, Kuopio University Hospital, Kuopio, Finland.
Konsta PamiloCoxa Hospital for Joint Replacement and Faculty of Medicine and Health Technologies, Tampere University, Tampere.
Keijo T MäkeläDepartment of Orthopaedic Surgery, University of Turku and Turku University Hospital, Turku.
Tampere University · FITurku University Hospital · FIUniversity of Turku · FIFinnish Institute for Health and Welfare · FIKuopio University Hospital · FIOulu University Hospital · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background and purpose - The use of crosslinked polyethylene in total hip arthroplasty (THA) has decreased wear remarkably. It has been suggested that the antioxidative effects of vitamin E may enhance the wear properties of polyethylene even further. This study evaluates revision rates between vitamin E-infused polyethylene liners (E1 and E-poly, ZimmerBiomet, Warsaw, IN, USA) versus moderately crosslinked polyethylene (ModXLPE) liners from the same manufacturer used in primary THA.Patients and methods - We conducted a study based on data from the Finnish Arthroplasty Register. The study group consisted of 2,723 THAs with a vitamin E-infused liner and a reference group of 2,707 THAs with a moderately crosslinked polyethylene liner. Survivorship, revision risk, and re-revision causes were compared between groups.Results - The 7-year survival of the vitamin E-infused polyethylene liner group and of the reference group with revision for any reason as the endpoint was comparable (94% [95% CI 92.9-94.9] and 93% [CI 91.9-93.9], respectively). The adjusted hazard ratio (HR) for any revision was similar between the groups (0.7 [CI 0.4-1.1]). When revision for aseptic loosening was studied as the endpoint, the survival for the study group was 99% (CI 98.6-99.4) and for the reference group 99% (CI 98.7-99.5), and the risk of revision was comparable between the study groups (HR 1.3 [CI 0.7-2.5]).Interpretation - After an observation period of 7 years vitamin E-infused liners shows results equal to results obtained with crosslinked polyethylene liners.

Indexed as

Hip ProsthesisProsthesis DesignProsthesis FailureAgedAntioxidantsArthroplasty, Replacement, HipFemaleFinlandHumansKaplan-Meier EstimateMaleMiddle AgedOsteoarthritis, HipPolyethyleneProportional Hazards ModelsRegistriesAntioxidantsPolyethyleneVitamin E

Identifiers

PMID33517823
PMCPMC8231410
OpenAlexW3127575361

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.