Evidence map›Paper›PMID 31650310›Full record

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

A longitudinal tear in the medial meniscal body decreased the in situ meniscus force under an axial load.

Yuta Tachibana, Tatsuo Mae, Konsei Shino, Tomoki Ohori, Hiromichi Fujie, Hideki Yoshikawa, Ken Nakata

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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 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.4field-weighted citation impact, top 32% 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

5 citing papers in PubMed, 7 citations in OpenAlex.

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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 at 3 institutions in 1 country.

Yuta TachibanaDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, 565-0871, Osaka, Japan. tachibanayuta@gmail.com.ORCID http://orcid.org/0000-0003-2916-3332
Tatsuo MaeDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, 565-0871, Osaka, Japan.
Konsei ShinoSports Orthopaedic Surgery, Yukioka Hospital, 2-2-3, Ukita, Kita-ku, Osaka, 530-0021, Osaka, Japan.
Tomoki OhoriDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, 565-0871, Osaka, Japan.
Hiromichi FujieBiomechanics Laboratory, Faculty of System Design, Tokyo Metropolitan University, 1-1, Minami-Osawa, Hachioji, 192-0397, Tokyo, Japan.
Hideki YoshikawaDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, 565-0871, Osaka, Japan.
Ken NakataDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamada-oka, Suita, 565-0871, Osaka, Japan.
The University of Osaka · JPTokyo Metropolitan University · JPYukioka Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo clarify the effect of longitudinal tears of the medial meniscus on the in situ meniscus force and the tibiofemoral relationship under axial load.

methodsTwenty-one intact porcine knees were mounted on a 6-degrees of freedom robotic system, and the force and three-dimensional path of the knee joints were recorded during three cycles under a 250-N axial load at 30°, 60°, 90° and 120° of knee flexion. They were divided into three groups of seven knees with longitudinal tears in the middle to the posterior segment of the medial meniscus based on the tear site: rim, outer one-third and inner one-third of the meniscal body. After creating tears, the same tests were performed. Finally, all paths were reproduced after total medial meniscectomy, and the in situ force of the medial meniscus was calculated based on the principle of superposition.

resultsWith a longitudinal tear, the in situ force of the medial meniscus was significantly decreased at 60°, 90° and 120° of knee flexion, regardless of the tear site. The decrement was greater with a tear in the meniscal body than a tear in the rim. A longitudinal tear in the meniscal body caused a significantly greater tibial varus rotation than a tear in the rim at all flexion angles.

conclusionLongitudinal tears significantly decreased the in situ force of the medial meniscus. Tears in the meniscal body caused a larger decrease of the in situ meniscus force and greater varus tibial rotation than tears in the rim.

Indexed as

AnimalsBiomechanical PhenomenaHumansKnee InjuriesKnee JointMeniscectomyMenisci, TibialRange of Motion, ArticularRotationRuptureSwineTibiaTibial Meniscus InjuriesAxial loadIn situ forceLongitudinal tearMedial meniscusPorcine kneeSix-degrees of freedom robotic systemTibiofemoral relationship

Identifiers

PMID31650310
OpenAlexW2981559724

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.