Evidence map›Paper›PMID 27264500›Full record

ArticleProgress in orthodontics2016

Tridimensional finite element analysis of teeth movement induced by different headgear forces.

Ivan Toshio Maruo, Hiroshi Maruo, Armando Yukio Saga, Dauro Douglas de Oliveira, Marco André Argenta, Orlando Motohiro Tanaka

Abstract read
In one paragraph

Article in Progress in orthodontics, 2016. 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
–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

5 citing papers in PubMed.

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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

6 authors.

Ivan Toshio MaruoOrthodontic Graduation Program, Brazilian Dental Association (ABO) and Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil.
Hiroshi MaruoOrthodontic Graduation Program, Brazilian Dental Association (ABO), Ponta Grossa, Paraná, Brazil.
Armando Yukio SagaOrthodontic Graduation Program, Brazilian Dental Association (ABO) and Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil.
Dauro Douglas de OliveiraOrthodontic Graduation Program, Pontifical Catholic University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Marco André ArgentaPost Graduation Program in Numerical Methods in Engineering, Federal University of Paraná, Curitiba, Brazil.
Orlando Motohiro TanakaGraduate Program in Orthodontics, Pontifícia Universidade Católica do Paraná, School of Life Sciences, R. Imaculada Conceição, 1155, Curitiba, Brazil. tanakaom@gmail.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThis study aimed to simulate the actions of low-pull (LP), high-pull (HP), and combined pull (CP) headgears (HGs) and to analyze tooth movement tendencies through finite element analysis.

methodsTomographic slices of a human maxilla with complete permanent dentition were processed by reconstruction software, and the triangular surface mesh was converted into non-uniform rational B-spline (NURBS) curves. An HG facial bow was also modulated in 3D. The teeth and bone were considered to have isotropic and linear behavior, whereas the periodontal ligament was considered to have non-linear and hyperelastic behavior. Data regarding the application points, directions and magnitudes of forces were obtained from the literature and from a dolichofacial patient with class II, division 1 malocclusion, who was treated with a CP HG.

resultsThe CP HG promoted 37.1 to 41.1 %, and the HP HG promoted 19.1 to 31.9 % of LP distalization. The HP HG presented the highest intrusion, and the LP HG presented the highest extrusion of the first molar. The LP HG contracted the distal side, and the HP and CP HGs contracted the lingual and distobuccal roots of the second molar to a lesser degree.

conclusionsThe LP HG promotes the greatest distalization, followed by the CP and HP HGs; the LP HG causes greater extrusion of the first molar, and the HP HG causes greater intrusion of the first molar. The LP HG causes greater contraction of the second molar than the HP HG.

Indexed as

Extraoral Traction AppliancesFinite Element AnalysisAlveolar ProcessBiomechanical PhenomenaCone-Beam Computed TomographyDentition, PermanentHumansImage Processing, Computer-AssistedImaging, Three-DimensionalMalocclusion, Angle Class IIMaxillaModels, AnatomicModels, BiologicalMolarOrthodontic Appliance DesignPeriodontal LigamentExtraoral traction appliancesFinite element analysisTooth movement

Identifiers

PMID27264500
PMCPMC4893458

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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.