Evidence map›Paper›PMID 34425762›Full record

ArticleBMC medical imaging2021

Aerodynamic characteristics in upper airways among orthodontic patients and its association with adenoid nasopharyngeal ratios in lateral cephalograms.

Xin Feng, Yicheng Chen, Weihua Cai, Stein Atle Lie, Kristina Hellén-Halme, Xie-Qi Shi

Open access · goldAbstract read
In one paragraph

Article in BMC medical imaging, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
0.7field-weighted citation impact, top 31% 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

1 citing paper in PubMed, 7 citations in OpenAlex.

  1. Review
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 at 4 institutions in 3 countries.

Xin FengDepartment of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009, Bergen, Norway.
Yicheng ChenSchool of Energy Science and Engineering, Harbin Institute of Technology, Xi Da Zhi Street, Nangang, Harbin, 150001, People's Republic of China.
Weihua CaiSchool of Energy and Power Engineering, Northeast Electric Power University, Changchun Road 169, Changchun, 132012, People's Republic of China.
Stein Atle LieDepartment of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009, Bergen, Norway.
Kristina Hellén-HalmeDepartment of Oral and Maxillofacial Radiology, Faculty of Odontology, Malmö University, 205 06, Malmö, Sweden.
Xie-Qi ShiDepartment of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009, Bergen, Norway. xieqi.shi@uib.no.
Malmö University · SEUniversity of Bergen · NOHarbin Institute of Technology · CNNortheast Electric Power University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAdenoid hypertrophy among orthodontic patients may be detected in lateral cephalograms. The study investigates the aerodynamic characteristics within the upper airway (UA) by means of computational fluid dynamics (CFD) simulation. Furthermore, airflow features are compared between subgroups according to the adenoidal nasopharyngeal (AN) ratios.

methodsThis retrospective study included thirty-five patients aged 9-15 years having both lateral cephalogram and cone beam computed tomography (CBCT) imaging that covered the UA region. The cases were divided into two subgroups according to the AN ratios measured on the lateral cephalograms: Group 1 with an AN ratio < 0.6 and Group 2 with an AN ratio ≥ 0.6. Based on the CBCT images, segmented UA models were created and the aerodynamic characteristics at inspiration and expiration were simulated by the CFD method for the two groups. The studied aerodynamic parameters were pressure drop (ΔP), maximum midsagittal velocity (V

resultsThe maximum V

conclusionsThe maximum V

Indexed as

AdenoidsAdolescentCephalometryChildCone-Beam Computed TomographyCross-Sectional StudiesFemaleHumansMaleNasopharynxRadiography, PanoramicRetrospective StudiesAdenoidsCBCTComputational fluid dynamicsLateral cephalogramUpper airway

Identifiers

PMID34425762
PMCPMC8381502
OpenAlexW3193975705

What OpenQuestion holds

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LicenceCC BY
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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.