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Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances

Detalhes bibliográficos
Ano de defesa: 2023
Autor(a) principal: Wilka Delgado, Lorena Alejandra
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Aparelho Twin Block
Aparelhos funcionais
Functional appliances
Orthodontics
Ortodontia
Twin Block appliances
Link de acesso: https://www.teses.usp.br/teses/disponiveis/25/25144/tde-22062023-112211/
Resumo: Introduction: The aim of this study was to compare the skeletal and dentoalveolar stability produced by the Twin Block (TB) appliances through cephalometric measures. Methods: The treatment group sample comprised 11 patients with Class II malocclusion, previously treated with TB, evaluated at three stages: pretreatment, posttreatment, and long-term posttreatment. The control group comprised 11 subjects with normal occlusion. Lateral cephalometric films were obtained at the three stages. Were measured a customized cephalometric analysis generated 17 variables, 7 angular and 10 linear. Intragroup comparisons among the 3 stages were performed with repeated measures analysis of variance ANOVA, followed by Tukey tests. Intergroup comparisons of posttreatment changes and normal growth changes of the treatment group were performed with T-tests (P<0,05) Results: Lower anterior facial height, the angle formed by the maxillary incisors long axis and the NA line, and Overbite demonstrated significant relapses in relation to the control group. The same intragroup difference was found in the TB group. Conclusion: Most dentoalveolar changes obtained with the Twin Block followed by fixed appliances during treatment remained stable in the long term. However, lower anterior facial height, the angle formed by the maxillary incisors long axis and the NA line, and Overbite, demonstrated significant relapses in relation to the control group. Therefore, periodic control should be increased in the posttreatment period to prevent relapse possibilities.
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spelling Long-term stability of class II division 1 malocclusion treated with the Twin Block appliancesEstabilidade a longo prazo do tratamento da má oclusão de classe II divisão 1 com o aparelho Twin Block, associado a ortodontia corretivaAparelho Twin BlockAparelhos funcionaisFunctional appliancesOrthodonticsOrtodontiaTwin Block appliancesIntroduction: The aim of this study was to compare the skeletal and dentoalveolar stability produced by the Twin Block (TB) appliances through cephalometric measures. Methods: The treatment group sample comprised 11 patients with Class II malocclusion, previously treated with TB, evaluated at three stages: pretreatment, posttreatment, and long-term posttreatment. The control group comprised 11 subjects with normal occlusion. Lateral cephalometric films were obtained at the three stages. Were measured a customized cephalometric analysis generated 17 variables, 7 angular and 10 linear. Intragroup comparisons among the 3 stages were performed with repeated measures analysis of variance ANOVA, followed by Tukey tests. Intergroup comparisons of posttreatment changes and normal growth changes of the treatment group were performed with T-tests (P<0,05) Results: Lower anterior facial height, the angle formed by the maxillary incisors long axis and the NA line, and Overbite demonstrated significant relapses in relation to the control group. The same intragroup difference was found in the TB group. Conclusion: Most dentoalveolar changes obtained with the Twin Block followed by fixed appliances during treatment remained stable in the long term. However, lower anterior facial height, the angle formed by the maxillary incisors long axis and the NA line, and Overbite, demonstrated significant relapses in relation to the control group. Therefore, periodic control should be increased in the posttreatment period to prevent relapse possibilities.Introdução: O objetivo deste estudo foi avaliar a estabilidade após 10 anos da correção da má oclusão de Classe II, subdivisão 1 em pacientes que foram tratados com o aparelho ortopédico funcional Twin Block seguido pela ortodontia corretiva. Métodos: A amostra do grupo de tratamento foi composta por 11 pacientes com má oclusão de Classe II, previamente tratados com TB, avaliados em três etapas: pré-tratamento, pós-tratamento e pós-tratamento de longo prazo. O grupo controle foi composto por 11 indivíduos com oclusão normal. As radiografias cefalométricas laterais foram obtidas nas três etapas. Foram medidas uma análise cefalométrica personalizada gerada 17 variáveis, 7 angulares e 10 lineares. As comparações intragrupo entre os 3 estágios foram realizadas com análise de medidas repetidas de variância ANOVA, seguida de testes de Tukey. Comparações entre grupos de alterações pós-tratamento e alterações de crescimento normal do grupo de tratamento foram realizadas com testes T (P <0,05) Resultados: O grupo TB apresentou maiores mudanças na comparação intergrupos, principalmente na altura facial anteroinferior, angulação dos incisivos superiores entre os pontos NA e o Overbite. Conclusão: A maioria das alterações dentoalveolares obtidas com o Twin Block seguido de aparelhos fixos durante o tratamento permaneceram estáveis a longo prazo. No entanto, a altura facial anterior inferior, o ângulo formado pelo longo eixo do incisivo superior e a linha NA e o Overbite demonstraram recidivas significativas em relação ao grupo controle. Portanto, o controle periódico deve ser aumentado no período pós-tratamento para evitar possibilidades de recidiva.Biblioteca Digitais de Teses e Dissertações da USPHenriques, Jose Fernando CastanhaWilka Delgado, Lorena Alejandra 2023-03-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttps://www.teses.usp.br/teses/disponiveis/25/25144/tde-22062023-112211/reponame:Biblioteca Digital de Teses e Dissertações da USPinstname:Universidade de São Paulo (USP)instacron:USPReter o conteúdo por motivos de patente, publicação e/ou direitos autoriais.info:eu-repo/semantics/openAccesseng2025-05-16T17:58:55Zoai:teses.usp.br:tde-22062023-112211Biblioteca Digital de Teses e Dissertaçõeshttp://www.teses.usp.br/PUBhttp://www.teses.usp.br/cgi-bin/mtd2br.plvirginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.bropendoar:27212025-05-16T17:58:55Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances
Estabilidade a longo prazo do tratamento da má oclusão de classe II divisão 1 com o aparelho Twin Block, associado a ortodontia corretiva
title Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances
spellingShingle Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances
Wilka Delgado, Lorena Alejandra
Aparelho Twin Block
Aparelhos funcionais
Functional appliances
Orthodontics
Ortodontia
Twin Block appliances
title_short Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances
title_full Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances
title_fullStr Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances
title_full_unstemmed Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances
title_sort Long-term stability of class II division 1 malocclusion treated with the Twin Block appliances
author Wilka Delgado, Lorena Alejandra
author_facet Wilka Delgado, Lorena Alejandra
author_role author
dc.contributor.none.fl_str_mv Henriques, Jose Fernando Castanha
dc.contributor.author.fl_str_mv Wilka Delgado, Lorena Alejandra
dc.subject.por.fl_str_mv Aparelho Twin Block
Aparelhos funcionais
Functional appliances
Orthodontics
Ortodontia
Twin Block appliances
topic Aparelho Twin Block
Aparelhos funcionais
Functional appliances
Orthodontics
Ortodontia
Twin Block appliances
description Introduction: The aim of this study was to compare the skeletal and dentoalveolar stability produced by the Twin Block (TB) appliances through cephalometric measures. Methods: The treatment group sample comprised 11 patients with Class II malocclusion, previously treated with TB, evaluated at three stages: pretreatment, posttreatment, and long-term posttreatment. The control group comprised 11 subjects with normal occlusion. Lateral cephalometric films were obtained at the three stages. Were measured a customized cephalometric analysis generated 17 variables, 7 angular and 10 linear. Intragroup comparisons among the 3 stages were performed with repeated measures analysis of variance ANOVA, followed by Tukey tests. Intergroup comparisons of posttreatment changes and normal growth changes of the treatment group were performed with T-tests (P<0,05) Results: Lower anterior facial height, the angle formed by the maxillary incisors long axis and the NA line, and Overbite demonstrated significant relapses in relation to the control group. The same intragroup difference was found in the TB group. Conclusion: Most dentoalveolar changes obtained with the Twin Block followed by fixed appliances during treatment remained stable in the long term. However, lower anterior facial height, the angle formed by the maxillary incisors long axis and the NA line, and Overbite, demonstrated significant relapses in relation to the control group. Therefore, periodic control should be increased in the posttreatment period to prevent relapse possibilities.
publishDate 2023
dc.date.none.fl_str_mv 2023-03-27
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.teses.usp.br/teses/disponiveis/25/25144/tde-22062023-112211/
url https://www.teses.usp.br/teses/disponiveis/25/25144/tde-22062023-112211/
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv
dc.rights.driver.fl_str_mv Reter o conteúdo por motivos de patente, publicação e/ou direitos autoriais.
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Reter o conteúdo por motivos de patente, publicação e/ou direitos autoriais.
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.coverage.none.fl_str_mv
dc.publisher.none.fl_str_mv Biblioteca Digitais de Teses e Dissertações da USP
publisher.none.fl_str_mv Biblioteca Digitais de Teses e Dissertações da USP
dc.source.none.fl_str_mv
reponame:Biblioteca Digital de Teses e Dissertações da USP
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Biblioteca Digital de Teses e Dissertações da USP
collection Biblioteca Digital de Teses e Dissertações da USP
repository.name.fl_str_mv Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)
repository.mail.fl_str_mv virginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.br
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