Evidence map›Paper›PMID 27821165›Full record

ArticleHead & face medicine2016

Classification and characterization of class III malocclusion in Chinese individuals.

Cai Li, Ying Cai, Sihui Chen, Fengshan Chen

Open access · goldAbstract readComparative Study
In one paragraph

Article in Head & face medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 27% 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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 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

4 authors at 1 institution in 1 country.

Cai LiDepartment of Orthodontics, School & Hospital of Stomatology, Shanghai Engineering Research Centre of Tooth Restoration and Regeneration, Tongji University, Shanghai, 200072, China.
Ying CaiDepartment of Orthodontics, School & Hospital of Stomatology, Shanghai Engineering Research Centre of Tooth Restoration and Regeneration, Tongji University, Shanghai, 200072, China.
Sihui ChenDepartment of Orthodontics, School & Hospital of Stomatology, Shanghai Engineering Research Centre of Tooth Restoration and Regeneration, Tongji University, Shanghai, 200072, China.
Fengshan ChenDepartment of Orthodontics, School & Hospital of Stomatology, Shanghai Engineering Research Centre of Tooth Restoration and Regeneration, Tongji University, Shanghai, 200072, China. orthodboy@126.com.ORCID http://orcid.org/0000-0002-7451-7796
Tongji University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundClass III malocclusion is a maxillofacial disorder that is characterised by a concave profile and can be attributed to both genetic inheritance and environmental factors. It is a clinical challenge due to our limited understanding of its aetiology. Revealing its prototypical diversity will contribute to our sequential exploration of the underlying aetiological information. The objective of this study was to characterize phenotypic variations of Class III malocclusion via a lateral cephalometric analysis in a community of Chinese individuals.

methodOne-hundred-and-forty-four individuals (58 males ≥18 and 86 females ≥16) with Class III malocclusion ranging from mild to severe were enrolled in this study. Principal component analysis and cluster analysis were performed using 61 lateral cephalometric measurements.

resultsSix principal components were discovered in the examined population and were responsible for 73.7 % of the variability. Four subtypes were revealed by cluster analysis. Subtype 1 included subjects with mild mandibular prognathism with a steep mandibular plane. Subjects in subtype 2 showed a combination of prognathic mandibular and retrusive maxillary with a flat or normal mandibular plane. Subtype 3 included individuals with purely severe mandibular prognathism and a normal mandibular plane. Individuals in subtype 4 had a mild maxillary deficiency and severe mandibular prognathism with the lowest mandibular plane angle.

conclusionThe six principal components extracted among the 61 variables improve our knowledge of lateral cephalometric analysis for diagnoses. We successfully identified four Class III malocclusion subtypes, indicating that cluster analysis could supplement the classification of Class III malocclusion among a Chinese population and may assist in our on-going genetic study.

Indexed as

AdolescentAdultAnalysis of VarianceAsian PeopleCephalometryCluster AnalysisCohort StudiesFemaleHospitals, UniversityHumansLongitudinal StudiesMaleMalocclusion, Angle Class IIIMultivariate AnalysisPrincipal Component AnalysisSeverity of Illness IndexClass III malocclusionCluster analysisMandibular prognathismMultivariatePrincipal component analysisSubtypes

Identifiers

PMID27821165
PMCPMC5100215
OpenAlexW2550669814

What OpenQuestion holds

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LicenceCC BY
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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.