Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency

Detalhes bibliográficos
Autor(a) principal: Janson, Gabriela
Data de Publicação: 2022
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Biblioteca Digital de Teses e Dissertações da USP
Texto Completo: https://www.teses.usp.br/teses/disponiveis/25/25144/tde-09062022-091959/
Resumo: Introduction: Differently of the Conventional Orthognathic Surgery (COS), Surgery First Approach (SF) is performed prior to dental decompensation for immediate improvement of facial esthetics. However, the assumption that SF skeletal relapse influence the final occlusion has been raised. Objectives: To compare the occlusal outcomes, treatment time and efficiency of both orthodontic-surgical approaches. Methods: SF group comprised 25 patients (7 male, 18 female) with a mean age of 31.2 years treated with the surgery first approach. COS group comprised 21 patients (10 male, 11 female) with a mean age of 28.5 years treated with conventional orthognathic surgery. Both groups included similar ratio of Class I, II and III malocclusions. Cephalometric variables were measured at pre and posttreatment phases. OGS and PAR Index were evaluated in pre and posttreatment dental models. Efficiency was calculated as the rate between the percentage of PAR reduction and treatment time, in months. Intergroup comparisons were performed using t and Mann- Whitney tests (p <0.05). Results: SF group showed a greater increase in the mandibular length compared to COS group. The maxillomandibular discrepancy increased in SF group and decreased in COS group. The lower face height increased in SF group and decreased in COS group. The mandibular incisor labial inclination and the lower lip thickness decreased in SF group and increased in COS group. SF group presented better occlusal outcomes (final PAR and OGS), shorter treatment time and greater efficiency. Conclusion: Surgery-first approach presented superior occlusal outcomes with a shorter treatment time compared to conventional orthognathic surgery. Surgery-first approach was more efficient than conventional orthognathic surgery.
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spelling Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiencyResultados oclusais finais, tempo e eficiência do tratamento ortodôntico-cirúrgico convencional e com benefício antecipadoCirurgia ortognáticaEfficiencyEficiênciaOrthognathic surgeryTempo de tratamentoTreatment timeIntroduction: Differently of the Conventional Orthognathic Surgery (COS), Surgery First Approach (SF) is performed prior to dental decompensation for immediate improvement of facial esthetics. However, the assumption that SF skeletal relapse influence the final occlusion has been raised. Objectives: To compare the occlusal outcomes, treatment time and efficiency of both orthodontic-surgical approaches. Methods: SF group comprised 25 patients (7 male, 18 female) with a mean age of 31.2 years treated with the surgery first approach. COS group comprised 21 patients (10 male, 11 female) with a mean age of 28.5 years treated with conventional orthognathic surgery. Both groups included similar ratio of Class I, II and III malocclusions. Cephalometric variables were measured at pre and posttreatment phases. OGS and PAR Index were evaluated in pre and posttreatment dental models. Efficiency was calculated as the rate between the percentage of PAR reduction and treatment time, in months. Intergroup comparisons were performed using t and Mann- Whitney tests (p <0.05). Results: SF group showed a greater increase in the mandibular length compared to COS group. The maxillomandibular discrepancy increased in SF group and decreased in COS group. The lower face height increased in SF group and decreased in COS group. The mandibular incisor labial inclination and the lower lip thickness decreased in SF group and increased in COS group. SF group presented better occlusal outcomes (final PAR and OGS), shorter treatment time and greater efficiency. Conclusion: Surgery-first approach presented superior occlusal outcomes with a shorter treatment time compared to conventional orthognathic surgery. Surgery-first approach was more efficient than conventional orthognathic surgery.Introdução: Diferentemente da Cirurgia Ortognática Convencional (COCTF), a Cirurgia de Benefício Antecipado (COBA) é realizada previamente a descompensação dentária, favorecendo a estética facial imediatamente. No entanto, especula-se que a recidiva esquelética da COBA tem influência nos resultados oclusais. Objetivo: Comparar os resultados oclusais finais, o tempo de tratamento e a eficiência proporcionados por ambas as abordagens ortodôntico-cirúrgicas. Material e métodos: O grupo COBA foi composto por 25 pacientes (7 homens, 18 mulheres) com idade média de 31,2 anos tratados com Benefício Antecipado. O grupo COCTF foi composto por 21 pacientes (10 homens, 11 mulheres) com idade média de 28,5 anos tratados com Cirurgia Ortognática Convencional. Ambos os grupos incluíram más oclusões de Classe I, II e III em proporções semelhantes. As variáveis cefalométricas foram avaliadas nos estágios de pré e pós-tratamento. Os índices OGS e PAR foram medidos em modelos de pré e pós-tratamento. A eficiência foi calculada como a taxa entre a redução percentual do PAR e o tempo de tratamento em meses. As comparações intergrupos foram realizadas utilizando-se testes t e Mann-Whitney (p <0,05). Resultados: O grupo COBA apresentou maior aumento no comprimento mandibular em relação ao grupo COCTF. A discrepância maxilomandibular aumentou no grupo COBA e diminuiu no grupo COCTF. A altura da face inferior aumentou no grupo COBA e diminuiu no grupo COCTF. A inclinação do incisivo inferior e a espessura do lábio inferior diminuíram no grupo COBA e aumentaram no grupo COCTF. O grupo COBA apresentou melhores resultados oclusais (PAR final e OGS), menor tempo de tratamento e maior eficiência. Conclusão: A cirurgia de benefício antecipado apresentou melhores resultados oclusais com tempo de tratamento reduzido em comparação com a cirurgia ortognática convencional. A cirurgia de benefício antecipado foi mais eficiente do que a cirurgia ortognática convencional.Biblioteca Digitais de Teses e Dissertações da USPCarreira, Daniela Gamba GaribJanson, Gabriela2022-03-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttps://www.teses.usp.br/teses/disponiveis/25/25144/tde-09062022-091959/reponame:Biblioteca Digital de Teses e Dissertações da USPinstname:Universidade de São Paulo (USP)instacron:USPLiberar o conteúdo para acesso público.info:eu-repo/semantics/openAccesseng2024-08-02T15:59:02Zoai:teses.usp.br:tde-09062022-091959Biblioteca 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:27212024-08-02T15:59:02Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency
Resultados oclusais finais, tempo e eficiência do tratamento ortodôntico-cirúrgico convencional e com benefício antecipado
title Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency
spellingShingle Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency
Janson, Gabriela
Cirurgia ortognática
Efficiency
Eficiência
Orthognathic surgery
Tempo de tratamento
Treatment time
title_short Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency
title_full Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency
title_fullStr Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency
title_full_unstemmed Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency
title_sort Conventional orthognathic surgery versus surgery first approach: occlusal outcomes, treatment time and efficiency
author Janson, Gabriela
author_facet Janson, Gabriela
author_role author
dc.contributor.none.fl_str_mv Carreira, Daniela Gamba Garib
dc.contributor.author.fl_str_mv Janson, Gabriela
dc.subject.por.fl_str_mv Cirurgia ortognática
Efficiency
Eficiência
Orthognathic surgery
Tempo de tratamento
Treatment time
topic Cirurgia ortognática
Efficiency
Eficiência
Orthognathic surgery
Tempo de tratamento
Treatment time
description Introduction: Differently of the Conventional Orthognathic Surgery (COS), Surgery First Approach (SF) is performed prior to dental decompensation for immediate improvement of facial esthetics. However, the assumption that SF skeletal relapse influence the final occlusion has been raised. Objectives: To compare the occlusal outcomes, treatment time and efficiency of both orthodontic-surgical approaches. Methods: SF group comprised 25 patients (7 male, 18 female) with a mean age of 31.2 years treated with the surgery first approach. COS group comprised 21 patients (10 male, 11 female) with a mean age of 28.5 years treated with conventional orthognathic surgery. Both groups included similar ratio of Class I, II and III malocclusions. Cephalometric variables were measured at pre and posttreatment phases. OGS and PAR Index were evaluated in pre and posttreatment dental models. Efficiency was calculated as the rate between the percentage of PAR reduction and treatment time, in months. Intergroup comparisons were performed using t and Mann- Whitney tests (p <0.05). Results: SF group showed a greater increase in the mandibular length compared to COS group. The maxillomandibular discrepancy increased in SF group and decreased in COS group. The lower face height increased in SF group and decreased in COS group. The mandibular incisor labial inclination and the lower lip thickness decreased in SF group and increased in COS group. SF group presented better occlusal outcomes (final PAR and OGS), shorter treatment time and greater efficiency. Conclusion: Surgery-first approach presented superior occlusal outcomes with a shorter treatment time compared to conventional orthognathic surgery. Surgery-first approach was more efficient than conventional orthognathic surgery.
publishDate 2022
dc.date.none.fl_str_mv 2022-03-30
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
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dc.identifier.uri.fl_str_mv https://www.teses.usp.br/teses/disponiveis/25/25144/tde-09062022-091959/
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dc.language.iso.fl_str_mv eng
language eng
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dc.rights.driver.fl_str_mv Liberar o conteúdo para acesso público.
info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
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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
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reponame:Biblioteca Digital de Teses e Dissertações da USP
instname:Universidade de São Paulo (USP)
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instname_str Universidade de São Paulo (USP)
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reponame_str Biblioteca Digital de Teses e Dissertações da USP
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