Evidence map›Paper›PMID 30535590›Full record

ArticleEuropean journal of orthopaedic surgery & traumatology : orthopedie traumatologie2019

Mid-term clinical results of the cementless R3 cup and Polarstem total hip arthroplasty.

Ali Assaf, Jonathan R Manara, Kar H Teoh, Aled R Evans

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Article in European journal of orthopaedic surgery & traumatology : orthopedie traumatologie, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–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

11 citing papers in PubMed.

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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

4 authors.

Ali AssafTrauma & Orthopaedic Department, The Hip Arthroplasty Unit, Royal Gwent Hospital, Newport, Wales, NP20 2UB, UK. assafali0418@gmail.com.ORCID http://orcid.org/0000-0002-5778-6927
Jonathan R ManaraTrauma & Orthopaedic Department, The Hip Arthroplasty Unit, Royal Gwent Hospital, Newport, Wales, NP20 2UB, UK.
Kar H TeohTrauma & Orthopaedic Department, The Hip Arthroplasty Unit, Royal Gwent Hospital, Newport, Wales, NP20 2UB, UK.ORCID http://orcid.org/0000-0002-1538-8760
Aled R EvansTrauma & Orthopaedic Department, The Hip Arthroplasty Unit, Royal Gwent Hospital, Newport, Wales, NP20 2UB, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThere has been a shift from cemented to uncemented hip arthroplasty. One popular uncemented combination is the R3 acetabular cup with Polarstem, having the lowest revision rate in the UK National Joint Registry. However, there are no medium-term clinical outcomes on this combination in the literature. The aim of this study is to review our centre's outcomes with this combination using conventional bearings with a minimum of 7-year follow-up.

methodsUsing our centre's arthroplasty database, we identified all patients that underwent a total hip arthroplasty using these implants from August 2009 to December 2010. One hundred and forty-four procedures were performed. The primary outcome was revision rate, and the secondary outcomes were clinical and radiological evaluation.

resultsThe mean cohort age at surgery was 68.3 years. There were three revisions, of which only one underwent a cup revision. The mean Oxford Hip Score at 7-year follow-up was 38. Radiological evaluation of both acetabular and stem component did not show any radiolucency at 7-year follow-up. Kaplan-Meier survivorship analysis showed an implant survival rate of 97.69% at 7 years using revision for all causes as endpoint. The risk of revision was 1.47% at 7 years.

conclusionOur revision rates are comparable to the UK's National Joint Registry, with excellent clinical and radiological outcome. Our results correlate with the allocated rating of 7A* by the Orthopaedic Data Evaluation Panel for both R3 acetabular cup and Polarstem.

Indexed as

AdultAgedAged, 80 and overArthroplasty, Replacement, HipFemaleFollow-Up StudiesHip ProsthesisHumansMaleMiddle AgedOsteoarthritis, HipPatient SatisfactionPostoperative ComplicationsProsthesis DesignRegistriesReoperationCementlessPolar stemR3 cupTotal hip arthroplastyTotal hip replacementUncemented

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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.