Evidence map›Paper›PMID 26519188›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2016

The superficial medial collateral ligament is the primary medial restraint to knee laxity after cruciate-retaining or posterior-stabilised total knee arthroplasty: effects of implant type and partial release.

Kiron K Athwal, Hadi El Daou, Christoph Kittl, Andrew J Davies, David J Deehan, Andrew A Amis

Abstract read
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In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Clinical assessment of antero-medial rotational knee laxity: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2017
    Pooled it
  2. Article
  3. A scoping review and guide for in vitro healthy human knee joint laxity.Frontiers in bioengineering and biotechnology · 2026
    Review
  4. Evaluation of a novel robotic testing method for stability and kinematics of total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Effect of medial collateral ligament release and osteophyte resection on medial laxity in total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
    Article
  10. A constrained-condylar fixed-bearing total knee arthroplasty is stabilised by the medial soft tissues.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
    Article
  11. Observational
  12. Increased valgus laxity in flexion with greater tibial resection depth following total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2019
    Article
  13. Article
  14. Tibiofemoral rotational alignment affects flexion angles in navigated posterior-stabilized total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2018
    Article
  15. 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

6 authors.

Kiron K AthwalDepartment of Mechanical Engineering, Imperial College London, Exhibition Road, London, SW7 2AZ, UK.
Hadi El DaouDepartment of Mechanical Engineering, Imperial College London, Exhibition Road, London, SW7 2AZ, UK.
Christoph KittlDepartment of Mechanical Engineering, Imperial College London, Exhibition Road, London, SW7 2AZ, UK.
Andrew J DaviesGuy's Hospital, Great Maze Pond, London, SE1 9RT, UK.
David J DeehanDepartment of Orthopaedic Surgery, Newcastle Freeman University Hospital, Newcastle upon Tyne, UK.
Andrew A AmisDepartment of Mechanical Engineering, Imperial College London, Exhibition Road, London, SW7 2AZ, UK. a.amis@imperial.ac.uk.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe aim of this study was to quantify the contributions of medial soft tissues to stability following cruciate-retaining (CR) or posterior-stabilised (PS) total knee arthroplasty (TKA).

methodsUsing a robotic system, eight cadaveric knees were subjected to ±90-N anterior-posterior force, ±5-Nm internal-external and ±8-Nm varus-valgus torques at various flexion angles. The knees were tested intact and then with CR and PS implants, and successive cuts of the deep and superficial medial collateral ligaments (dMCL, sMCL) and posteromedial capsule (PMC) quantified the percentage contributions of each structure to restraining the applied loads.

resultsIn implanted knees, the sMCL restrained valgus rotation (62 % across flexion angles), anterior-posterior drawer (24 and 10 %, respectively) and internal-external rotation (22 and 37 %). Changing from CR TKA to PS TKA increased the load on the sMCL when resisting valgus loads. The dMCL restrained 11 % of external and 13 % of valgus rotations, and the PMC was significant at low flexion angles.

conclusionsThis work has shown that medial release in the varus knee should be minimised, as it may inadvertently result in a combined laxity pattern. There is increasing interest in preserving constitutional varus in TKA, and this work argues for preservation of the sMCL to afford the surgeon consistent restraint and maintain a balanced knee for the patient.

Indexed as

AgedAged, 80 and overArthroplasty, Replacement, KneeCadaverFemaleHumansJoint InstabilityKnee JointKnee ProsthesisMaleMedial Collateral Ligament, KneeMiddle AgedPostoperative ComplicationsRange of Motion, ArticularRotationTorqueBiomechanicsLigament releaseMedial collateral ligamentRestraintStabilityTotal knee arthroplasty

Identifiers

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.