Evidence map›Paper›PMID 21946980›Full record

Trial reportKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2012

Functional performance of mobile versus fixed bearing total knee prostheses: a randomised controlled trial.

W C H Jacobs, B Christen, A B Wymenga, A Schuster, D B van der Schaaf, A ten Ham, U Wehrli

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

Trial report in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing 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

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

  1. 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
  2. Mobile-bearing versus fixed-bearing total knee arthroplasty: a meta-analysis of randomized controlled trials.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2022
    Pooled it
  3. Pooled it
  4. Pooled it
  5. No difference in clinical outcome between fixed- and mobile-bearing TKA: a meta-analysis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2014
    Pooled it
  6. Trial
  7. Trial
  8. Fixed versus mobile weight-bearing prosthesis in total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2012
    Trial
  9. Article
  10. Superior long-term survival for fixed bearing compared with mobile bearing in ligament-balanced total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2018
    Article
  11. No differences between fixed- and mobile-bearing total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2017
    Review
  12. Mobile bearing and fixed bearing total knee arthroplasty.Annals of translational medicine · 2016
    Review
  13. Different femorotibial contact points between fixed- and mobile-bearing TKAs do not show clinical impact.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2015
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. 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

7 authors.

W C H JacobsDepartment of Neurosurgery, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands. wch.jacobs@gmail.com
B Christen
A B Wymenga
A Schuster
D B van der Schaaf
A ten Ham
U Wehrli

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe primary goal of this study was to assess the difference in active flexion between patients with a mobile versus a fixed bearing, cruciate retaining, and total knee arthroplasty. The study was designed as a randomised controlled multi-centre trial.

methodsParticipants were assigned to interventions by using block-stratified, random allocation. Outcome parameters were active flexion, passive flexion, and Knee Society Score (KSS). Outcome parameters were assessed preoperatively and at 3, 6, and 12 months postoperatively by an independent nurse.

resultsNinety-two patients from one centre were included, 46 in each group. Active flexion was comparable for the two groups, 99.9° for the mobile bearing group and 101° for the fixed bearing group with a baseline controlled difference of 1.0 (95% CI -3.9 to 5.8, n.s.). The Clinical KSS was comparable between the two bearing groups (Mobile 90.0 vs. fixed 92.4, n.s.). The functional KSS showed a difference that was attributable to the stair climbing subscore, which showed a difference in favour of the fixed bearing design between preoperative and 3 months (7.3 point difference; 95% CI 2.3-12.5; P = 0.005) as well as 12 months (4.8 point difference; 95% CI 0.1-9.6; P = 0.045).

conclusionsThere were no short-term differences in active flexion between fixed bearing and mobile bearing total knee arthroplasty. LEVEL OF EVIDENCE: I.

Indexed as

Knee ProsthesisProsthesis DesignAgedFemaleHumansKnee JointMaleMiddle AgedOsteoarthritis, KneeRange of Motion, ArticularRecovery of FunctionTreatment Outcome

Identifiers

PMID21946980
PMCPMC3402661

What OpenQuestion holds

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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.