Evidence map›Paper›PMID 27815591›Full record

Trial reportInternational orthopaedics2017

Does vitamin E-blended polyethylene reduce wear in primary total hip arthroplasty: a blinded randomised clinical trial.

Caroline Scemama, Philippe Anract, Valérie Dumaine, Antoine Babinet, Jean Pierre Courpied, Moussa Hamadouche

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in International orthopaedics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 4 pooled it
–field-weighted citation impact
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

26 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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  19. Overview of Randomized Controlled Trials in Primary Total Hip Arthroplasty (34,020 Patients): What Have We Learnt?Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2020
    Review
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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

6 authors.

Caroline ScemamaDepartment of Orthopaedic and Reconstructive Surgery, Clinical Orthopaedic Research Center, Centre Hospitalo-Universitaire Pitié Salpétrière, 83 boulevard de l'hôpital, 75013, Paris, France. scemamacaroline@gmail.com.
Philippe AnractDepartment of Orthopaedic and Reconstructive Surgery, Clinical Orthopaedic Research Centre, Service A, Centre Hospitalo-Universitaire Cochin- Port Royal, 27 Rue du Faubourg St Jacques, 75014, Paris, France.
Valérie DumaineDepartment of Orthopaedic and Reconstructive Surgery, Clinical Orthopaedic Research Centre, Service A, Centre Hospitalo-Universitaire Cochin- Port Royal, 27 Rue du Faubourg St Jacques, 75014, Paris, France.
Antoine BabinetDepartment of Orthopaedic and Reconstructive Surgery, Clinical Orthopaedic Research Centre, Service A, Centre Hospitalo-Universitaire Cochin- Port Royal, 27 Rue du Faubourg St Jacques, 75014, Paris, France.
Jean Pierre CourpiedDepartment of Orthopaedic and Reconstructive Surgery, Clinical Orthopaedic Research Centre, Service A, Centre Hospitalo-Universitaire Cochin- Port Royal, 27 Rue du Faubourg St Jacques, 75014, Paris, France.
Moussa HamadoucheDepartment of Orthopaedic and Reconstructive Surgery, Clinical Orthopaedic Research Centre, Service A, Centre Hospitalo-Universitaire Cochin- Port Royal, 27 Rue du Faubourg St Jacques, 75014, Paris, France.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeSome data indicate that first-generation highly cross-linked polyethylene (HXLPE) can oxidise in vivo and is associated with reduced mechanical properties. To overcome these limitations, a natural anti-oxidant vitamin E has been added to HXLPE to preserve the mechanical properties and decrease oxidative degradation whilst conserving high wear resistance. We hypothesised that after a minimal three years of follow-up the use of vitamin E-blended HXLPE would result in lower radiographic wear when compared with ultra-high molecular weight polyethylene (UHMWPE).

methodsOne hundred patients were randomised to receive hybrid total hip arthroplasty (THA) using a monoblock cementless acetabular component made either of UHMWPE or vitamin E-blended HXLPE. All other parameters were identical in both groups. Complete follow-up was available for 74 of these patients. Femoral head penetration was measured using a validated computer-assisted method.

resultsThe median creep measured 0.111 mm (range, -0.576 - +0.444 mm) in the vitamin E-blended group versus 0.170 mm (range, -0.861 - +0.884 mm) in the UHMWPE group (difference of medians, 0.059; p = 0.046). The median steady state penetration rate was -0.008 mm/year (range, -0.88 - +0.64 mm/year) in the vitamin E-blended group versus 0.133 mm/year (range, -0.84 - +0.85 mm/year) in the UHMWPE group (difference of medians 0.141, p = 0.043).

conclusionsThis study demonstrated that femoral head penetration was lower when using vitamin E-blended HXLPE when compared with UHMWPE, with a steady-state penetration rate far below the osteolysis threshold. Longer-term follow-up is needed to warrant whether wear reduction will generate less occurrence of osteolysis and aseptic loosening.

Indexed as

AcetabulumAdultAgedArthroplasty, Replacement, HipFemaleFemur HeadFollow-Up StudiesHip ProsthesisHumansMaleMiddle AgedOsteolysisPolyethyleneProsthesis DesignProsthesis FailureVitamin EPolyethyleneVitamin EHXLPEPolyethyleneTotal hip arthroplastyUHMWPEVitamin EWear

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.