Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up.

Humans Incisor Follow-Up Studies Dental Arch Malocclusion / therapy Mandible Recurrence
Longitudinal studies Malocclusion Recurrence Secondary prevention Tooth extraction

Journal

Progress in orthodontics
ISSN: 2196-1042
Titre abrégé: Prog Orthod
Pays: Germany
ID NLM: 100936353

Informations de publication

Date de publication:
20 Mar 2023
Historique:
received: 09 11 2022
accepted: 20 02 2023
entrez: 20 3 2023
pubmed: 21 3 2023
medline: 22 3 2023
Statut: epublish

Résumé

Occlusal stability is one of the goals of orthodontic treatment, and keeping teeth aligned in the long term is a challenge for the orthodontist. This study aimed to compare the long-term incisors irregularity and dental arches dimensions changes in subjects treated with 4 premolar extractions with different pretreatment Little's irregularity index (LII). The knowledge of long-term outcomes is evidence-based information for the prognosis of future treatments. In total, 41 treated subjects were divided into two groups according to mandibular Little irregularity value at pretreatment (mild or severe). The maxillary and mandibular LII, transversal, and longitudinal widths were assessed at pretreatment, posttreatment, and 37-year posttreatment. Chi-square and independent t tests were used for intergroup comparison. The groups presented similar behavior for all stages of maxillary and mandibular arch dimensions changes. Maxillary irregularity was corrected in both groups after treatment, and the alignment was acceptable in the long term. In the mild group, the mandibular incisor irregularity returned to pretreatment values in the long term. The mandibular LII increased in the severe group but did not return to pretreatment values in the long term. The mild crowding group presented proportionally more relapse of mandibular incisor irregularity than the severe crowding group in the long term. Even so, the correction of mild and severe crowding with the extraction of 4 premolars showed satisfactory results in the long term, even with the presence of maturational changes and relapse.

Sections du résumé

BACKGROUND BACKGROUND
Occlusal stability is one of the goals of orthodontic treatment, and keeping teeth aligned in the long term is a challenge for the orthodontist. This study aimed to compare the long-term incisors irregularity and dental arches dimensions changes in subjects treated with 4 premolar extractions with different pretreatment Little's irregularity index (LII). The knowledge of long-term outcomes is evidence-based information for the prognosis of future treatments.
METHODS METHODS
In total, 41 treated subjects were divided into two groups according to mandibular Little irregularity value at pretreatment (mild or severe). The maxillary and mandibular LII, transversal, and longitudinal widths were assessed at pretreatment, posttreatment, and 37-year posttreatment. Chi-square and independent t tests were used for intergroup comparison.
RESULTS RESULTS
The groups presented similar behavior for all stages of maxillary and mandibular arch dimensions changes. Maxillary irregularity was corrected in both groups after treatment, and the alignment was acceptable in the long term. In the mild group, the mandibular incisor irregularity returned to pretreatment values in the long term. The mandibular LII increased in the severe group but did not return to pretreatment values in the long term.
CONCLUSIONS CONCLUSIONS
The mild crowding group presented proportionally more relapse of mandibular incisor irregularity than the severe crowding group in the long term. Even so, the correction of mild and severe crowding with the extraction of 4 premolars showed satisfactory results in the long term, even with the presence of maturational changes and relapse.

Identifiants

DOI: 10.1186/s40510-023-00461-8 PMID: 36935470 PMC: PMC10025172
pubmed: 36935470
doi: 10.1186/s40510-023-00461-8
pii: 10.1186/s40510-023-00461-8
pmc: PMC10025172
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

10

Subventions

Organisme : Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
ID : Finance Code 001

Informations de copyright

© 2023. The Author(s).

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Auteurs

Caroline Martins Gambardela-Tkacz (CM)

Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, SP, 17012-901, Brazil.

Gabriela Alcaraz (G)

Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, SP, 17012-901, Brazil. gdomenico@usp.br.
ORCID: 0000-0003-0557-5973

Paula Cotrin (P)

Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, SP, 17012-901, Brazil.

Karina Maria Salvatore de Freitas (KMS)

Department of Orthodontics, UNINGA University Center, Maringá, PR, Brazil.

Willana Moura (W)

Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, SP, 17012-901, Brazil.

Guilherme Janson (G)

Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, SP, 17012-901, Brazil.

Daniela Garib (D)

Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, SP, 17012-901, Brazil.

Marcos Roberto de Freitas (MR)

Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, SP, 17012-901, Brazil.

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Classifications MeSH

questionsmedicales.fr › Eucaryotes › Animaux › Chordés › Vertébrés › Mammifères › Eutheria › Primates › Haplorhini › Catarrhini › Hominidae › Humains › Incisor irregularity and dental arch...
questionsmedicales.fr › Système stomatognathique › Bouche › Denture › Dent › Incisive › Incisor irregularity and dental arch...
questionsmedicales.fr › Environnement et santé publique › Santé publique › Méthodes épidémiologiques › Caractéristiques des études épidémiologiques › Études épidémiologiques › Études de cohortes › Études de suivi › Incisor irregularity and dental arch...
questionsmedicales.fr › Système stomatognathique › Mâchoire › Arcade dentaire › Incisor irregularity and dental arch...
questionsmedicales.fr › Maladies du système stomatognathique › Maladies des dents › Malocclusion dentaire › Incisor irregularity and dental arch...
questionsmedicales.fr › Système stomatognathique › Mâchoire › Mandibule › Incisor irregularity and dental arch...
questionsmedicales.fr › États, signes et symptômes pathologiques › Processus pathologiques › Caractéristiques de la maladie › Récidive › Incisor irregularity and dental arch...