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Master's Dissertation
DOI
https://doi.org/10.11606/D.25.2021.tde-25112021-115622
Document
Author
Full name
Thales Lippi Ciantelli
Institute/School/College
Knowledge Area
Date of Defense
Published
Bauru, 2021
Supervisor
Committee
Henriques, Jose Fernando Castanha (President)
Carreira, Daniela Gamba Garib
Patel, Mayara Paim
Pedrin, Renata Rodrigues de Almeida
Title in English
Comparison of direct skeletally anchorage distalization and two premolar extractions for Class II treatment
Keywords in English
Angle Class II
Imageamento tridimensional
Imaging
Má Oclusão de Angle Classe II, Procedimentos de ancoragem ortodôntica
Malocclusion
Orthodontic anchorage procedures.
Three-dimensional
Abstract in English
Introduction: to compare the dentoskeletal and soft-tissue effects of Class II malocclusion treatment using two different protocols: maxillary premolar extractions and skeletally anchored molar distalization using the Miniscrew-Anchored Distalizer with lateral radiographs and digitized models. Material and Methods: The sample comprised 35 patients with Class II malocclusion divided into two groups: Group 1 consisted of 15 patients treated with the Miniscrew-Anchored Distalizer (MAD), followed by fixed appliances. Group 2 consisted of 20 patients treated with maxillary first premolar extractions (XP2). Lateral radiographs were digitized with the ScanMaker i800 and analyzed with the Dolphin Imaging 11.9 software. The plaster models were digitized with the scanner 3Shape R700 and the digitized models were analyzed with the software OrthoAnalyzer. The intergroups treatment changes were compared with t-tests or Mann-Whitney tests, depending on normality. Results: The MAD group presented significantly greater intrusion of maxillary incisors, maxillary molar distalization and distal rotation, mandibular incisors labial tipping and mandibular molars mesialization. The XP2 group showed significantly maxillary molar mesial movement, greater reduction in the intermolar distance, arc perimeter, and arc length. Conclusion: Both protocols effectively treated Class II malocclusion promoting dentoalveolar changes. The MAD produced more mandibular incisor's labial tipping and accentuated molar distal rotation. The XP2 protocol promotes significantly greater reduction of the transversal arch dimensions.
Title in English
Comparison of direct skeletally anchorage distalization and two premolar extractions for Class II treatment
Keywords in English
Angle Class II
Imageamento tridimensional
Imaging
Má Oclusão de Angle Classe II, Procedimentos de ancoragem ortodôntica
Malocclusion
Orthodontic anchorage procedures.
Three-dimensional
Abstract in English
Introdução: comparar os efeitos dentoesqueléticos e de tecidos moles do tratamento da má oclusão de Classe II utilizando dois diferentes protocolos: extrações de prémolares superiores e distalização de molares com ancoragem esquelética direta com o Miniscrew-Anchored Distalizer a partir de radiografias laterais e modelos digitalizados. Material e Métodos: A amostra foi composta por 35 pacientes com má oclusão de Classe II divididos em dois grupos: Grupo 1 composto por 15 pacientes tratados com o Miniscrew-Anchored Distalizer (MAD), seguido de aparelhos fixos. O Grupo 2 consistiu de 20 pacientes tratados com extrações de primeiros pré-molares superiores (XP2). As radiografias laterais foram digitalizadas com o ScanMaker i800 e analisadas com o software Dolphin Imaging 11.9. Os modelos de gesso foram digitalizados com o scanner 3Shape R700 e os modelos digitalizados foram analisados com o software OrthoAnalyzer. As mudanças de tratamento intergrupos foram comparadas com testes t ou testes de Mann-Whitney, dependendo da normalidade. Resultados: O grupo MAD apresentou intrusão significativamente maior dos incisivos superiores, distalização e rotação dos molares superiores, inclinação labial dos incisivos inferiors e mesialização dos molares inferiores. O grupo XP2 apresentou significativamente movimento mesial dos molares superiores, maior redução na distância intermolar, perímetro do arco e comprimento do arco. Conclusão: Ambos os protocolos trataram efetivamente a má oclusão de Classe II, promovendo alterações dentoalveolares. A MAD produziu mais inclinação labial dos incisivos inferiores e rotação distal acentuada do molar superior. O protocolo XP2 promove redução significante das dimensões do arco dentário.
 
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Release Date
2023-11-25
Publishing Date
2021-11-25
 
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