Evidence map›Paper›PMID 33165636›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2021

No difference in 13-year survival after medial pivot or central pivot mobile bearing total knee arthroplasty. A propensity matched comparative analysis.

Jean-Yves Jenny, Michel Bercovy, Alain Cazenave, Thierry Gaillard, Frédéric Châtain, Brigitt E Jolles, Jean-Louis Rouvillain, Dominique Saragaglia, French Society for Hip and Knee Surgery (SFHG)

Abstract readMulticenter Study
PubMed Publisher
In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

4 citing papers in PubMed.

  1. Medial pivot total knee arthroplasty.Journal of clinical orthopaedics and trauma · 2025
    Review
  2. Review
  3. Article
  4. 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

9 authors.

Jean-Yves JennyUniversity Hospital Strasbourg, CCOM, 10 avenue Baumann, 67400, Illkirch, France. jean-yves.jenny@chru-strasbourg.fr.
Michel BercovyClinique Arago, 187A Rue Raymond Losserand, 75014, Paris, France.
Alain CazenaveInstitut CALOT, Department of Orthopedic Surgery, 52 rue du Dr Calot, 62600, Berck-sur-Mer, France.
Thierry GaillardPolyclinique du Beaujolais, 120 Ancienne Route de Beaujeu, 69400, Arnas, France.
Frédéric ChâtainPole Santé Axone, 75 Avenue Gabriel Péri, 38400, Saint-Martin-d'Hères, France.
Brigitt E JollesSwiss BioMotion Lab, Department of Musculoskeletal Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Avenue Louis-Ruchonnet 57, 1003, Lausanne, Switzerland.
Jean-Louis RouvillainDepartment of Orthopaedic and Trauma Surgery, Hôpital Zobda Quitman, 97261, Fort-de-France, France.
Dominique SaragagliaDepartment of Osteoarthritis and Sport Surgery, Traumatology of the Limbs, Grenoble-Alpes South Teaching Hospital, 38130, Echirolles, France.
French Society for Hip and Knee Surgery (SFHG)

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe present study was designed to evaluate the long-term results (more than 10 years) of mobile bearing total knee arthroplasty (TKA) and to compare the survival of medial pivot axis (MPA) and central pivot axis (CPA) TKAs. The primary hypothesis was that the 10- to 15-year survival rate of MPA TKAs will be better than CPA TKAs.

methodsA national, multicenter, retrospective study was performed in France. In this case-control design, 1154 TKAs were paired into the CPA group (control group: 577 cases) and MPA group (study group: 577 cases) based on a logistic regression analysis of age, gender, body mass index and severity of the coronal deformity, defining the propensity score for each case. Final survival information follow-up was obtained for 946 cases (82%).

resultsThere was no significant difference between the control and study groups for any baseline data. Twenty-two prosthetic revisions (2%) were performed for mechanical reasons during the follow-up period. There was no significant difference between the 13-year survival rates of CPA (98%) and MPA (97%) TKAs. There was no significant difference between groups in their final Oxford and Knee Society scores.

conclusionOur findings do not support the assumption that medialization of the pivot axis of a mobile bearing TKA improves clinical results or survival. LEVEL OF EVIDENCE: Level III.

Indexed as

Arthroplasty, Replacement, KneeKnee ProsthesisOsteoarthritis, KneeFollow-Up StudiesHumansKnee JointProsthesis DesignRange of Motion, ArticularRetrospective StudiesCentral pivotKneeMedial pivotMobile bearingSurvivalTotal knee arthroplastyTotal knee replacement

Identifiers

PMID33165636

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.