Evidence map›Paper›PMID 27120194›Full record

Trial reportKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2017

No difference in terms of radiostereometric analysis between fixed- and mobile-bearing total knee arthroplasty: a randomized, single-blind, controlled trial.

M G M Schotanus, P Pilot, B L Kaptein, W F Draijer, P B J Tilman, R Vos, N P Kort

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 5 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

16 citing papers in PubMed, 5 syntheses or guidelines pooled it.

  1. Pooled it
  2. No difference between mobile and fixed bearing in primary total knee arthroplasty: a meta-analysis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
    Pooled it
  3. Mobile-bearing versus fixed-bearing total knee arthroplasty: a meta-analysis of randomized controlled trials.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2022
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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

7 authors.

M G M SchotanusDepartment of Orthopaedic Surgery, Zuyderland Medical Centre, Sittard-Geleen, The Netherlands. martijnschotanus@hotmail.com.
P PilotDepartment of Orthopaedic Surgery, Reinier de Graafweg Hospital, Delft, The Netherlands.
B L KapteinDepartment of Orthopaedic Surgery, Leiden University Medical Center, Leiden, The Netherlands.
W F DraijerDepartment of Orthopaedic Surgery, Zuyderland Medical Centre, Sittard-Geleen, The Netherlands.
P B J TilmanDepartment of Orthopaedic Surgery, Zuyderland Medical Centre, Sittard-Geleen, The Netherlands.
R VosDepartment of Methodology and Statistics, Maastricht University Medical Center, Maastricht, The Netherlands.
N P KortDepartment of Orthopaedic Surgery, Zuyderland Medical Centre, Sittard-Geleen, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeA concern that arises with any new prosthesis is whether it will achieve satisfactory long-term implant stability. The gold standard of assessing the quality of fixation in a new or relatively new implant is to undertake a randomized controlled trial using radiostereometric analysis. It was hypothesized that both mobile-bearing total knee arthroplasty and fixed-bearing total knee arthroplasty have comparable migration patterns at 2-year follow-up. This study investigated two types of cemented total knee arthroplasty, the mobile- or fixed-bearing variant from the same family with use of radiostereometric analysis.

methodsThis prospective, patient-blinded, randomized, controlled trial was designed to investigate early migration of the tibia component after two years of follow-up with use of radiostereometric analysis. A total of 50 patients were randomized to receive a mobile- or fixed-bearing TKA from the same family. Patients were evaluated during 2-year follow-up, including radiostereometric analysis, physical and clinical examination and patient reported outcome measures (PROMs).

resultsAt two-year follow-up, the mean (±SD) maximum total point motion (MTPM) in the fixed-bearing group was 0.82 (±1.16) versus 0.92 mm (±0.64) in the mobile-bearing group (p = n.s) with the largest migration seen during the first 6 weeks (0.45 ± 0.32 vs. 0.54 ± 0.30). The clinical outcome and PROMs significantly improved within each group, not between both groups.

conclusionsMeasuring early micromotion is useful for predicting clinical loosening that can lead to revision. The results of this study demonstrate that early migration of the mobile-bearing is similar to that of the fixed-bearing component at two years and was mainly seen in the first weeks after implantation. LEVEL OF EVIDENCE: Randomized, single-blind, controlled trial, Level I.

Indexed as

Knee ProsthesisRadiostereometric AnalysisAgedArthroplasty, Replacement, KneeFemaleFollow-Up StudiesHumansKnee JointMaleMiddle AgedProspective StudiesSingle-Blind MethodFixed bearingMigrationMobile bearingRSAStereophotogrammetric analysisTotal knee arthroplasty

Identifiers

PMID27120194

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.