Evidence map›Paper›PMID 27671286›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2017

Popliteus impingement after TKA may occur with well-sized prostheses.

Michel P Bonnin, Arnoud de Kok, Matthias Verstraete, Tom Van Hoof, Catherine Van Der Straten, Mo Saffarini, Jan Victor

Erratum issuedOpen access · hybridAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article 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. An erratum has been issued. Cited by 26 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 4 pooled it
2.8field-weighted citation impact, top 10% of its field
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

26 citing papers in PubMed, 4 syntheses or guidelines pooled it, 47 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Article
  6. [The importance of individual knee arthroplasty].Orthopadie (Heidelberg, Germany) · 2025
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  15. Review
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  17. Article
  18. Custom TKA: what to expect and where do we stand today?Archives of orthopaedic and trauma surgery · 2021
    Review
  19. Lack of small tibial component size availability for females in a highly utilized total knee arthroplasty system.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
    Article
  20. Mismatched knee implants in Indonesian and Dutch patients: a need for increasing the size.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Michel P BonninCentre Orthopédique Santy, 24 Av Paul Santy, Lyon, France. bonnin.michel@gmail.com.
Arnoud de KokDepartment of Orthopaedics, Ghent University, De Pintelaan, 185, Ghent, Belgium.
Matthias VerstraeteDepartment of Orthopaedics, Ghent University, De Pintelaan, 185, Ghent, Belgium.
Tom Van HoofDepartment of Orthopaedics, Ghent University, De Pintelaan, 185, Ghent, Belgium.
Catherine Van Der StratenDepartment of Orthopaedics, Ghent University, De Pintelaan, 185, Ghent, Belgium.
Mo SaffariniAccelerate Innovation Management, Rue de Hollande 4-6, 1204, Geneva, Switzerland.
Jan VictorDepartment of Orthopaedics, Ghent University, De Pintelaan, 185, Ghent, Belgium.
Ghent University Hospital · BECentre Orthopédique Santy · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo determine the mechanisms and extents of popliteus impingements before and after TKA and to investigate the influence of implant sizing. The hypotheses were that (1) popliteus impingements after TKA may occur at both the tibia and the femur, and (2) even with an apparently well-sized prosthesis, popliteal tracking during knee flexion is modified compared to the preoperative situation.

methodsThe location of the popliteus in three cadaver knees was measured using computed tomography, before and after implantation of plastic TKA replicas, by injecting the tendon with radiopaque liquid. The pre- and post-operative positions of the popliteus were compared from full extension to deep flexion using normosized, oversized, and undersized implants (one size increments).

resultsAt the tibia, TKA caused the popliteus to translate posteriorly, mostly in full extension: 4.1 ± 2 mm for normosized implants, and 15.8 ± 3 mm with oversized implants, but no translations were observed when using undersized implants. At the femur, TKA caused the popliteus to translate laterally at deeper flexion angles, peaking between 80° and 120°: 2 ± 0.4 mm for normosized implants and 2.6 ± 0.5 mm with oversized implants. Three-dimensional analysis revealed prosthetic overhang at the posterosuperior corner of normosized and oversized femoral components (respectively, up to 2.9 mm and 6.6 mm).

conclusionsA well-sized tibial component modifies popliteal tracking, while an undersized tibial component maintains more physiologic patterns. Oversizing shifts the popliteus considerably throughout the full arc of motion. This study suggests that both femoro- and tibio-popliteus impingements could play a role in residual pain and stiffness after TKA.

Indexed as

Arthroplasty, Replacement, KneeLigaments, ArticularCadaverHumansJoint InstabilityKnee JointKnee ProsthesisPostoperative ComplicationsRange of Motion, ArticularTomography, X-Ray ComputedPopliteus tendonTKA impingementTKA painTKA sizing

Identifiers

PMID27671286
PMCPMC5487584
OpenAlexW2524588030

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.