Evidence map›Paper›PMID 32277264›Full record

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

The superficial medial collateral ligament is the major restraint to anteromedial instability of the knee.

Guido Wierer, Danko Milinkovic, James R Robinson, Michael J Raschke, Andreas Weiler, Christian Fink, Mirco Herbort, Christoph Kittl

Abstract read
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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 66 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed, 1 pooled it
11.0field-weighted citation impact, top 1% 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

66 citing papers in PubMed, 1 synthesis or guideline pooled it, 104 citations in OpenAlex.

  1. Pooled it
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  7. A scoping review and guide for in vitro healthy human knee joint laxity.Frontiers in bioengineering and biotechnology · 2026
    Review
  8. Review
  9. [Medial collateral ligament bracing].Operative Orthopadie und Traumatologie · 2025
    Review
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6 more citing papers are in PubMed but not listed here.

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

8 authors at 6 institutions in 3 countries.

Guido WiererDepartment of Orthopedics and Traumatology, Paracelsus Medical University Salzburg, Salzburg, Austria. wierer@gmail.com.ORCID http://orcid.org/0000-0001-6433-9896
Danko MilinkovicDepartment of Orthopedic and Trauma surgery, Arcus Sportclinic, Pforzheim, Germany.
James R RobinsonAvon Orthopaedic Centre, Bristol, UK.
Michael J RaschkeDepartment of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University Muenster, Muenster, Germany.
Andreas WeilerSporthopaedicum Berlin, Berlin, Germany.
Christian FinkResearch Unit for Orthopaedic Sports Medicine and Injury Prevention (OSMI), ISAG, UMIT Hall, Hall in Tirol, Austria.
Mirco HerbortResearch Unit for Orthopaedic Sports Medicine and Injury Prevention (OSMI), ISAG, UMIT Hall, Hall in Tirol, Austria.
Christoph KittlDepartment of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University Muenster, Muenster, Germany.
UMIT - Private Universität für Gesundheitswissenschaften, Medizinische Informatik und Technik · ATUniversity of Münster · DEARCUS Sports Clinic · DEAvon Medical Centre · GBForschungsinstitut Havelhöhe · DEParacelsus Medical University · AT

Funding

Deutsche Kniegesellschaft DKGParacelsus Medizinische Privatuniversität Clinical Fellowship
6 · The paper itself

Abstract

purposeThe purpose of the present study was to determine how the medial structures and ACL contribute to restraining anteromedial instability of the knee.

methodsTwenty-eight paired, fresh-frozen human cadaveric knees were tested in a six-degree of freedom robotic setup. After sequentially cutting the dMCL, sMCL, POL and ACL in four different cutting orders, the following simulated clinical laxity tests were applied at 0°, 30°, 60° and 90° of knee flexion: 4 Nm external tibial rotation (ER), 4 Nm internal tibial rotation (IR), 8 Nm valgus rotation (VR) and anteromedial rotation (AMR)-combined 89 N anterior tibial translation and 4 Nm ER. Knee kinematics were recorded in the intact state and after each cut using an optical tracking system. Differences in medial compartment translation (AMT) and tibial rotation (AMR, ER, IR, VR) from the intact state were then analyzed.

resultsThe sMCL was the most important restraint to AMR, ER and VR at all flexion angles. Release of the proximal tibial attachment of the sMCL caused no significant increase in laxity if the distal sMCL attachment remained intact. The dMCL was a minor restraint to AMT and ER. The POL controlled IR and was a minor restraint to AMT and ER near extension. The ACL contributed with the sMCL in restraining AMT and was a secondary restraint to ER and VR in the MCL deficient knee.

conclusionThe sMCL appears to be the most important restraint to anteromedial instability; the dMCL and POL play more minor roles. Based on the present data a new classification of anteromedial instability is proposed, which may support clinical examination and treatment decision. In higher grades of anteromedial instability an injury to the sMCL should be suspected and addressed if treated surgically.

Indexed as

AgedAged, 80 and overAnterior Cruciate LigamentAnterior Cruciate Ligament InjuriesBiomechanical PhenomenaCadaverCollateral LigamentsFemaleHumansJoint InstabilityKnee JointMaleMedial Collateral Ligament, KneeMiddle AgedPhysical ExaminationRange of Motion, ArticularACLAnteromedial instabilityBiomechanicsMCLMedial collateral ligament

Identifiers

PMID32277264
OpenAlexW3016050954

What OpenQuestion holds

Textmetadata
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.