Evidence map›Paper›PMID 31267191›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2020

Static patella tilt and axial engagement in knee extension are mainly influenced by knee torsion, the tibial tubercle-trochlear groove distance (TTTG), and trochlear dysplasia but not by femoral or tibial torsion.

P Kaiser, F Loth, R Attal, M Kummann, P Schuster, F Riechelmann, M Schlumberger

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Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing 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

24 citing papers in PubMed.

  1. Article
  2. Review
  3. Idiopathic Adolescent Miserable Malalignment.Journal of the Pediatric Orthopaedic Society of North America · 2026
    Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Sulcus depth, congruence angle, Wiberg index, TT-TG distance, and CDI are strong predictors of recurrent patellar dislocation.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023
    Article
  9. Article
  10. Axial orientation of the femoral trochlea is superior to femoral anteversion for predicting patellar instability.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023
    Article
  11. Internal tibial torsion is associated with medial meniscus posterior horn tears.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023
    Article
  12. Influence of medial open wedge high tibial osteotomy on tibial tuberosity-trochlear groove distance.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023
    Article
  13. Article
  14. The winking sign is an indicator for increased femorotibial rotation in patients with recurrent patellar instability.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
    Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. 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.

P KaiserDepartment of Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria.
F LothDepartment of Psychiatry, Psychotherapy and Psychosomatics, Medical University Innsbruck, Innsbruck, Austria.
R AttalDepartment of Trauma Surgery, Landeskrankenhaus Feldkirch, Feldkirch, Austria. rene.elattal@vlkh.net.
M KummannDepartment of Radiology, Medical University of Innsbruck, Innsbruck, Austria.
P SchusterCenter of Arthroscopy and Sports Medicine, Orthopedic Hospital Markgroeningen, Markgroeningen, Germany.
F RiechelmannDepartment of Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria.
M SchlumbergerDepartment of Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe aim of this study was to investigate the association of femoral (FT), tibial (TT), and knee torsion (KT) on the patella tilt (PT), the axial engagement index (AEI), and the tibial tuberosity-trochlear groove distance (TTTG).

methodsFemoral torsion, tibial torsion, knee torsion, patella tilt, the axial engagement index, the TTTG, and trochlear dysplasia were retrospectively evaluated on 59 patients suffering from recurrent patella instability or anterior knee pain with 118 torsional lower limb magnetic resonance imaging studies.

resultsFT and TT did not show any significant associations with TTTG, PT, and AEI (n.s.). KT was significantly associated with a higher TTTG, higher PT, and lower AEI (all, p < 0.001). Higher grade trochlear dysplasia was associated with a higher PT and lower AEI (both, p < 0.001). The Dejour classification showed no significant association with FT, TT, KT, and TTTG (n.s.). All measurement parameters showed an excellent interrater agreement (ICC 0.89-0.97).

conclusionsStatic patella tilt and patellofemoral axial engagement in knee extension are mainly influenced by knee torsion, TTTG, and trochlear dysplasia but not by femoral or tibial torsion. These findings help to understand the underlying reasons for the patella position in knee extensions in CT and MRI investigations in patients suffering from patella instability and patellofemoral pain syndrome. LEVEL OF EVIDENCE: III.

Indexed as

AdolescentAdultBone MalalignmentFemaleFemurHumansJoint InstabilityKnee JointMagnetic Resonance ImagingMaleMiddle AgedPatellaRetrospective StudiesTibiaTomography, X-Ray ComputedYoung AdultAnterior knee painAnteversionAxial engagement indexFemoralInstabilityPatellaPatella tiltTibialTorsionTTTG

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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.