Evidence map›Paper›PMID 34320973›Full record

ArticleBMC oral health2021

The relation between incisal guidance angle and the growth and development of temporomandibular joint: a multi-cross-sectional retrospective study.

Ying Li, Wenwen Zhou, Yan Wu, Hongwei Dai, Jianping Zhou

Open access · goldAbstract read
In one paragraph

Article in BMC oral health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
5.0field-weighted citation impact, top 4% 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

14 citing papers in PubMed, 26 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

5 authors at 1 institution in 1 country.

Ying LiStomatological Hospital of Chongqing Medical University, No. 426 Songshi North Road, Chongqing, China.
Wenwen ZhouStomatological Hospital of Chongqing Medical University, No. 426 Songshi North Road, Chongqing, China.
Yan WuStomatological Hospital of Chongqing Medical University, No. 426 Songshi North Road, Chongqing, China.
Hongwei DaiStomatological Hospital of Chongqing Medical University, No. 426 Songshi North Road, Chongqing, China.
Jianping ZhouStomatological Hospital of Chongqing Medical University, No. 426 Songshi North Road, Chongqing, China. zjp@hospital.cqmu.edu.cn.
Stomatological Hospital of Chongqing Medical University · CN

Funding

the National Science Foundation for Young Scientists of China No. 31800818the Program for the Natural Science Foundation of Chongqing, China cstc2020jcyj-msxmX0191
6 · The paper itself

Abstract

backgroundThe incisal guidance angle (IGA) is related to temporomandibular joint (TMJ), and changes to the IGA are often involved in the prosthetic and orthodontic treatment of anterior teeth. However, the influence of incisal guidance on the growth, development and remodelling of the TMJ is not yet clear. The aim of this study was to investigate age-related morphological differences in the TMJ in subjects with different IGAs.

methodsCone-beam computed tomography (CBCT) images of 274 patients were included (group 1, IGA < 45°; group 2, 45° ≤ IGA ≤ 60°; group 3, IGA > 60°). Each group was then divided into 4 age groups (group a, 6-12 years; group b, 13-16 years; group c, 17-25 years; group d, 26-33 years). TMJ morphology was assessed by linear measurements, angular measurements, and subjective evaluations. The IGA and occlusal plane angle were also measured.

resultsAnterior inclination of condyle (AIC) increased with age in the three IGA groups but decreased from 17 years onward in group 2 (P < 0.05). In the age groups analysis, the AIC in group 1 was smaller than that in group 3 but larger than that in group 2 (P > 0.05). Articular eminence inclination (AEI) decreased with age in group 1 (P = 0.027) but increased with age in group 3 (P = 0.053). The AEI in group 2 was larger than that in group 1 at 17-25 years (P = 0.046), and it was larger in group 3 than in group 1 at 26-33 years (P = 0.047). The IGA had a weak correlation with AEI (P < 0.05).

conclusionThe articular fossa of patients with shallower incisal guidance changed to a flatter shape with age, whereas the condylar anterior slope and articular eminence of patients with steeper incisal guidance changed towards a steeper alignment. There was a correlation between IGA and TMJ shape.

Indexed as

Mandibular CondyleTemporomandibular JointAdolescentChildCone-Beam Computed TomographyCross-Sectional StudiesGrowth and DevelopmentHumansRetrospective StudiesIncisal guidance angleMorphologyTemporomandibular joint

Identifiers

PMID34320973
PMCPMC8317419
OpenAlexW3184134910

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.