Evidence map›Paper›PMID 35775183›Full record

Trial reportThe bone & joint journal2022

No difference in long-term micromotion between fully cemented and hybrid fixation in revision total knee arthroplasty: a randomized controlled trial.

Kelly Mills, Ate B Wymenga, Gijs G van Hellemondt, Petra J C Heesterbeek

Abstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in The bone & joint journal, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 1 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

5 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Review
  4. Review
  5. Article
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.

Kelly MillsSint Maartenskliniek, Nijmegen, the Netherlands.ORCID 0000-0002-9596-9425
Ate B WymengaSint Maartenskliniek, Nijmegen, the Netherlands.ORCID 0000-0003-2503-6301
Gijs G van HellemondtSint Maartenskliniek, Nijmegen, the Netherlands.ORCID 0000-0002-3720-8927
Petra J C HeesterbeekSint Maartenskliniek, Nijmegen, the Netherlands.ORCID 0000-0003-2873-8907

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsBoth the femoral and tibial component are usually cemented at revision total knee arthroplasty (rTKA), while stems can be added with either cemented or press-fit (hybrid) fixation. The aim of this study was to compare the long-term stability of rTKA with cemented and press-fitted stems, using radiostereometric analysis (RSA).

methodsThis is a follow-up of a randomized controlled trial, initially involving 32 patients, of whom 19 (nine cemented, ten hybrid) were available for follow-up ten years postoperatively, when further RSA measurements were made. Micromotion of the femoral and tibial components was assessed using model-based RSA software (RSAcore). The clinical outcome was evaluated using the Knee Society Score (KSS), the Knee injury and Osteoarthritis Outcome Score (KOOS), and visual analogue scale (pain and satisfaction).

resultsThe median total femoral translation and rotation at ten years were 0.39 mm (interquartile range (IQR) 0.20 to 0.54) and 0.59° (IQR 0.46° to 0.73°) for the cemented group and 0.70 mm (IQR 0.15 to 0.77) and 0.78° (IQR 0.47° to 1.43°) for the hybrid group. For the tibial components this was 0.38 mm (IQR 0.33 to 0.85) and 0.98° (IQR 0.38° to 1.34°) for the cemented group and 0.42 mm (IQR 0.30 to 0.52) and 0.72° (IQR 0.62° to 0.82°) for the hybrid group. None of these values were significantly different between the two groups and there were no significant differences between the clinical scores in the two groups at this time. There was only one re-revision, in the hybrid group, for infection and not for aseptic loosening.

conclusionThese results show good long-term fixation with no difference in micromotion and clinical outcome between fully cemented and hybrid fixation in rTKA, which builds on earlier short- to mid-term results. The patients all had type I or II osseous defects, which may in part explain the good results. Cite this article:

Indexed as

Arthroplasty, Replacement, KneeKnee ProsthesisOsteoarthritis, KneeBone CementsHumansProsthesis DesignProsthesis FailureReoperationTreatment OutcomeBone CementsAseptic looseningclinical outcomesFully cementedhybrid fixationHybrid fixationKnee injury and Osteoarthritis Outcome Score (KOOS)Knee Society ScoreLong-term follow-upmodel-based RSARadiostereometric analysisradiostereometric analysis (RSA)randomized controlled trialRCTRevision total knee arthroplastyrevision total knee arthroplasty (rTKA)RSAStem fixationtibial components

Identifiers

PMID35775183
PMCPMC9251136

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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.