Dissertations / Theses on the topic 'Malocclusion. Malocclusion, Angle Class I'
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Dueckman, Peter George. "Treatment effect on skeletal class II low angle patients." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0005/MQ30664.pdf.
Full textKim, Pius Joon-Young. "Quantitative assessment of Class II malocclusion in mixed dentition." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21091.pdf.
Full textBurke, Gail M. "The correlation of condylar characteristics to facial morphology and their prediction of treatment outcomes in Class II patients." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21157.pdf.
Full textBurton, Rano. "An investigation into the treatment effects of three orthodontic appliance prescriptions for the correction of Class II division 1 malocclusions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23239.pdf.
Full textNiederberger, Ana Liesel Guggiari. "Stability of nonextraction Class II malocclusion treatment with elastics." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-31082018-183637/.
Full textO objetivo do presente estudo foi avaliar a estabilidade do tratamento sem extrações da má oclusão de Classe II com elásticos. Uma amostra de 43 pacientes com má oclusão de Classe II foi dividida em dois grupos. O grupo elástico (GE) consistiu em 20 pacientes que foram tratados com aparelho fixo associado a elásticos de Classe II. O grupo controle (GC), consistiu em 23 pacientes tratados com aparelho fixo associado ao aparelho extrabucal. Telerradiografias e modelos iniciais (T1), finais (T2) e pós-tratamento (T3) foram avaliados. Os grupos foram compativéis em relação à idade inicial, tempo de avaliação pós-tratamento, severidade inicial da má oclusão, qualidade do resultado do tratamento e em relação às variáveis cefalométricas prétratamento. Os pacientes do GE apresentaram maior tempo de tratamento, e maior idade ao final e no pós-tratamento. Após o tratamento, ambos os grupos apresentaram alterações semelhantes. Com respeito as alterações no periodo póstratamento, no GE, a mandíbula se mostrou ligeiramente retruida e no GC ocorreu uma ligeira protrusão. Em relação às variáveis dentoalveolares, o molar maxilar mostrou mesialização significativa no GC. Não houve diferenças entre os grupos em relação às alterações oclusais no periodo pós-tratamento, com exceção do overjet, que manteve-se estável no GE e mostrou melhoras no GC. A estabilidade do tratamento de má oclusão de Classe II com elásticos ou com aparelho extrabucal é semelhante.
Burns, Nikia R. "Class III camouflage treatment a retrospective study /." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5610.
Full textTitle from document title page. Document formatted into pages; contains ix, 204 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 136-139).
Caldas, Waleska Trovisco. "Relationship between malocclusion severity and treatment stability in Class II nonextraction treatment." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-19072018-144344/.
Full textIntrodução: Durante o planejamento do tratamento da má oclusão de Classe II é importante considerar a magnitude da discrepância ântero-posterior, o tempo de tratamento, a necessidade de cooperação do paciente, assim como a estabilidade em longo prazo dos resultados obtidos. O objetivo do presente estudo foi avaliar a estabilidade do tratamento sem extrações da má oclusão de Classe II, de acordo com a severidade da discrepância ântero-posterior inicial. Métodos: Dois grupos de pacientes foram selecionados de acordo com a severidade inicial da má oclusão. O Grupo Meia Classe II compreendeu 30 pacientes (16 meninos, 14 meninas) com idade média inicial de 13,15 anos (D.P. 3,62) e o Grupo Classe II Completa compreendeu 30 pacientes (15 meninos, 15 meninas) com idade inicial média de 11,99 anos (D.P. 1,26). Radiografias em norma lateral, radiografias panorâmicas e modelos de estudo foram obtidos pré-tratamento (T1), pós-tratamento (T2), e após um período mínimo de 2 anos pós-tratamento (T3). As comparações intragrupos das alterações das variáveis durante o período de pós-tratamento (T3-T2) foram realizadas por testes t pareados. As características cefalométricas e severidade da má oclusão inicial, alterações durante os períodos de tratamento e pós-tratamento foram comparadas entre os grupos por testes t. Uma análise de regressão linear múltipla foi conduzida para avaliar a influência das características pré-tratamento e da quantidade de alterações com o tratamento sobre a recidiva pós-tratamento. Os resultados foram considerados significantes para p<0,05. Resultados: Durante o período de pós-tratamento (T2-T3) não foram encontradas diferenças significantes entre os grupos. A avaliação oclusal demonstrou discreta mas significante recidiva da relação molar em ambos os grupos. A severidade inicial da sobressaliência, das relações canino e molar e a quantidade de alteração anteroposterior com o tratamento foram significantemente correlacionadas à recidiva da relação molar. Quando subgrupos de pacientes com tempos de tratamento compatíveis foram comparados, foi encontrada recidiva significantemente maior da relação molar no Grupo Classe II Completa. Conclusões: A severidade da discrepância ânteroposterior inicial da má oclusão de Classe II demonstrou influenciar significantemente a quantidade de recidiva pós-tratamento. Quando tratada sem extrações, a má oclusão de Classe II completa apresentou maior recidiva que uma relação molar Classe II menos severa.
Jacob, Helder Baldi [UNESP]. "Avaliação das dimensões e relacionamentos dos arcos dentários no tratamento da má-oclusão classe II, divisão 1 de Angle com aparelho bionator de Balters." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/95759.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A deficiência de dados na literatura nos levou a avaliar o efeito do tratamento com o aparelho Bionator de Balters nas alterações das dimensões e relacionamento dos arcos dentários em crianças com má-oclusão Classe II, divisão 1 de Angle. O grupo experimental foi consistituido de 36 pares de modelos de pacientes leucodermas com idades entre 7 anos e 10 meses e 11 anos e 8 meses sendo 10 do gênero feminino e 8 do gênero masculino. A seleção da amostra teve como critérios de inclusão a presença dos incisivos centrais e laterais erupcionados, ausência de apinhamento dentário e relação transversal dos arcos normais. Um grupo controle (pseudo-amostra controle) foi simulado a partir de uma amostra obtida por Moyers com idade e gêneros aproximadamente iguais ao grupo experimental. A análise dos modelos constou de 24 medidas das quais 18 puderam ser comparadas com a pseudo-amostra. A aplicação do teste de Levene mostrou evidências estatísticas de semelhança entre os grupos. Procedeu-se então a análise estatística que mostrou alterações significantes (p<0,005) nas variáveis indicativas de distância intermolares superiores, sobressaliência horizontal, comprimento total do arco superior, comprimento anterior do arco superior, comprimento posterior do arco superior, relação molar direita, relação molar esquerda, relação canino direita e relação canino esquerda. Por outro lado não houve alteração significante em relação as medidas do arco inferior e distancia intercaninos do arco superior. Pode ser concluído com base nos resultados encontrados que o uso do aparelho Bionator de Balters teve efeito favorável na melhora da correção da má-oclusão de Classe II (diminuição das relações molares e caninos) e um aumento transversal do arco superior, principalmente na região posterior do arco.
The deficiency of data in the literature took us to evaluate the Bionator of Balters appliance in the alterations of the dimensions and relationship of the dental archs in children with malocclusion Class II, Division 1 of Angle. The experimental group was constituted of 36 pairs of cast of leucodermas patients between the age of 7 years and 10 months and 11 years and 8 months, being 10 females and 8 males. The sample selection had as criterion of inclusion the presence of the central and lateral incisor erupted, absence of crowded teeth and normal transversal relationship. A control group (pseudo-sample group) was simulated beginning from a sample obtained by Moyers with approximately the same age and gender to the experimental group. The analysis of the casts consisted of 24 measures and 18 of them could be compared with the pseudo-sample. The Leveneþs test showed statistical evidences of likeness among the groups. Statistical analysis was proceeded with showed significant alterations (p<0,005) in the variable indicatives of distance of maxillary first molars, over jet, total length of upper arch, anterior length of the upper arch, right molar relationship, left molar relationship, right canine relationship and left canine relationship. On the other hand, there wasn't significant alteration related to the lower arch and maxillary intercanines distance. It be concluded with the use of the Bionator of Balters appliance that it had a favorable effect in the improvement of the correction of the malocclusion in Class II (decrease of the molars and canines relationship) and transversal increase of the upper arch, mainly in the posterior area of arch.
Wigal, Timothy G. "Long-term follow-up of patients treated with the edgewise crowned Herbst appliance in the mixed dentition." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5621.
Full textTitle from document title page. Document formatted into pages; contains xii, 290 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 186-196).
Van, Laecken Ryan. "Treatment effects of the edgewise Herbst appliance a cephalometric and tomographic investigation /." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2452.
Full textTitle from document title page. Document formatted into pages; contains x, 155 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 116-124).
Jacob, Helder Baldi. "Avaliação das dimensões e relacionamentos dos arcos dentários no tratamento da má-oclusão classe II, divisão 1 de Angle com aparelho bionator de Balters /." Araraquara : [s.n.], 2006. http://hdl.handle.net/11449/95759.
Full textBanca: Ana Claudia Moreira Melo
Banca: Dirceu Barnabé Raveli
Resumo: A deficiência de dados na literatura nos levou a avaliar o efeito do tratamento com o aparelho Bionator de Balters nas alterações das dimensões e relacionamento dos arcos dentários em crianças com má-oclusão Classe II, divisão 1 de Angle. O grupo experimental foi consistituido de 36 pares de modelos de pacientes leucodermas com idades entre 7 anos e 10 meses e 11 anos e 8 meses sendo 10 do gênero feminino e 8 do gênero masculino. A seleção da amostra teve como critérios de inclusão a presença dos incisivos centrais e laterais erupcionados, ausência de apinhamento dentário e relação transversal dos arcos normais. Um grupo controle (pseudo-amostra controle) foi simulado a partir de uma amostra obtida por Moyers com idade e gêneros aproximadamente iguais ao grupo experimental. A análise dos modelos constou de 24 medidas das quais 18 puderam ser comparadas com a pseudo-amostra. A aplicação do teste de Levene mostrou evidências estatísticas de semelhança entre os grupos. Procedeu-se então a análise estatística que mostrou alterações significantes (p<0,005) nas variáveis indicativas de distância intermolares superiores, sobressaliência horizontal, comprimento total do arco superior, comprimento anterior do arco superior, comprimento posterior do arco superior, relação molar direita, relação molar esquerda, relação canino direita e relação canino esquerda. Por outro lado não houve alteração significante em relação as medidas do arco inferior e distancia intercaninos do arco superior. Pode ser concluído com base nos resultados encontrados que o uso do aparelho Bionator de Balters teve efeito favorável na melhora da correção da má-oclusão de Classe II (diminuição das relações molares e caninos) e um aumento transversal do arco superior, principalmente na região posterior do arco.
Abstract: The deficiency of data in the literature took us to evaluate the Bionator of Balters appliance in the alterations of the dimensions and relationship of the dental archs in children with malocclusion Class II, Division 1 of Angle. The experimental group was constituted of 36 pairs of cast of leucodermas patients between the age of 7 years and 10 months and 11 years and 8 months, being 10 females and 8 males. The sample selection had as criterion of inclusion the presence of the central and lateral incisor erupted, absence of crowded teeth and normal transversal relationship. A control group (pseudo-sample group) was simulated beginning from a sample obtained by Moyers with approximately the same age and gender to the experimental group. The analysis of the casts consisted of 24 measures and 18 of them could be compared with the pseudo-sample. The Leveneþs test showed statistical evidences of likeness among the groups. Statistical analysis was proceeded with showed significant alterations (p<0,005) in the variable indicatives of distance of maxillary first molars, over jet, total length of upper arch, anterior length of the upper arch, right molar relationship, left molar relationship, right canine relationship and left canine relationship. On the other hand, there wasn't significant alteration related to the lower arch and maxillary intercanines distance. It be concluded with the use of the Bionator of Balters appliance that it had a favorable effect in the improvement of the correction of the malocclusion in Class II (decrease of the molars and canines relationship) and transversal increase of the upper arch, mainly in the posterior area of arch.
Mestre
Ricci, Ivan Delgado. "AVALIAÇÃO DA PROPORÇÃO DENTAL DE BOLTON EM INDIVÍDUOS COM OCLUSÃO NORMAL NATURAL E MALOCLUSÕES DE CLASSE I E CLASSE II DIVISÃO 1 DE ANGLE." Universidade Metodista de São Paulo, 2010. http://tede.metodista.br/jspui/handle/tede/1279.
Full textIntroduction: The Bolton analysis, analysis that quantifies the tooth size is an important reference for professionals seeking appropriate orthodontic finishing. Objective: The objective of this study is to verify that there is discrepancy between the subjects with normal occlusion and malocclusion Class I and Class II division 1 belonging to the selected sample, compared to the values reported by Bolton and also check difference related to sexual dimorphism. Methods: 3 groups of 35 pairs of plaster casts each, separated by the type of occlusion, pertaining to the program of graduate orthodontics at the Methodist University of Sao Paulo were measured with a digital caliper at its greatest distance mesiodistal since 1st right molar to 1st molar left, the upper and lower arches, with permanent teeth. The values were tabulated and the proportion of Bolton has been applied. Results: Respectively for groups 1, 2 and 3, the total ratio found was 90.36 (SD ± 1.70), 91.17 (SD ± 2.58) and 90.76 (SD ± 2.45) and the anterior ratio was 77.73 (SD ± 2.39), 78.01 (SD ± 2.66) and 77.30 (SD ± 2.65). Conclusion: there was no sexual dimorphism or statistically significant difference compared to the values suggested by Bolton.
Introdução: A análise de Bolton, análise que quantifica o tamanho dentário, é uma referência importante para profissionais que buscam finalizações ortodônticas adequadas. Objetivo: O objetivo deste trabalho é verificar se há discrepância entre os indivíduos com oclusão normal natural e maloclusões de Classe I e de Classe II divisão 1 de Angle pertencentes a amostra selecionada, em relação aos valores encontrados por Bolton, bem como verificar também se há dimorfismo sexual. Metodologia: 3 grupos contendo 35 pares e modelos em gesso cada, separados pelo tipo de oclusão, pertencentes ao acervo do programa de pós-graduação em Ortodontia da Universidade Metodista de São Paulo foram medidos com paquímetro digital em sua maior distância mésiodistal desde 1º molar direito a 1º molar esquerdo, dos arcos superiores e inferiores, com dentição permanente. Os valores foram tabulados e a proporção de Bolton foi aplicada. Resultados: Respectivamente para os grupos 1, 2 e 3, a proporção total encontrada foi de 90,36 (DP±1,70), 91,17 (DP±2,58) e 90,76 (DP±2,45), e a proporção anterior foi de 77,73 (DP±2,39), 78,01 (DP±2,66) e 77,30 (DP±2,65). Conclusão: não houve dimorfismo sexual nem diferença estatisticamente significante comparando os valores aos sugeridos por Bolton.
Casellas, Clemente. "Skeletal and dental changes with the acrylic splint Herbst appliance." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1868.
Full textTitle from document title page. Document formatted into pages; contains vii, 73 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 64-69).
Pavlow, Sarah Stanley. "Effect of early treatment on stability of occlusion in patients with a class ii malocclusion." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010440.
Full textTypescript. Title from title page of source document. Document formatted into pages; contains 30 pages. Includes Vita. Includes bibliographical references.
Gomes, Antonio Carlos Pereira. "Estudo eletromiográfico simultâneo das regiões superior, média e inferior do músculo masseter em indivíduos portadores de maloclusão classe III de Angle." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-01042002-090759/.
Full textThe participation of superior, middle and inferior regions of superficial masseter was evaluated by surface electromyography of 14 patients, 04 male and 10 female, ranging in age from 7 to 12 years, with Angles class III dental malocclusion. The Scan #9 of the computerized program of K6-I/EMG Eight Channel Surface Electromyograph system (Myo-tronics Co., Seatle, WA, EUA) was employed with bipolar surface double electrodes. The non-parametric test of Wilcoxon was employed to the comparison between sides, and the non-parametric test of Friedman was employed to the comparison among regions. It was concluded that: (1) at the opening and closing, swallowing saliva, centric occlusion and clenching with cotton rolls bilaterally at molar region, there was statistical differences between sides, and the left masseter developed more activity; (2) the superior region developed more activity with statistical differences at rest and rest after exercises positions, and was followed by the activity of middle and inferior regions, respectively; (3) the inferior region developed more activity with statistical differences at free protraction of the jaw, swallowing water, swallowing saliva and lateral movement to the left side without occlusal contact, and was followed by the activity of middle and superior regions, respectively; (4) the inferior region developed more activity with statistical differences at free opening, opening and closing, opening of the jaw against resistance and protraction of the jaw against resistance; and (5) the middle region developed intermediary activity with statistical differences at rest and resting after exercises, and at opening and closing, opening the jaw against resistance, free protraction, swallowing water, swallowing saliva, and lateral movement to the left side without occlusal contact.
Brazeau, Lisamarie O. "Cephalometric analysis of posttreatment changes in class ii division 1 patients treated in either one or two phases." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0004880.
Full textTypescript. Title from title page of source document. Document formatted into pages; contains 31 pages. Includes Vita. Includes bibliographical references.
Bigliazzi, Renato [UNESP]. "Estudo longitudinal das alterações dentoesqueléticas à longo prazo da má oclusão de classe II, divisão 1ª tratada com o Bionator de Balters utilizando-se a cefalometria radiográfica e a morfometria geométrica." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/104509.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Objetivo: Avaliar os efeitos à longo prazo do tratamento com o bionator base (Classe II) de Balters de pacientes com maloclusão de Classe II e retrusão mandibular em crescimento usando-se a morfometria (análise de thin-plate spline [TPS]). Materiais e Métodos: Vinte e três pacientes (8 meninos e 15 meninas) foram consecutivamente tratados com o bionator de Balters (grupo bionator). A amostra foi avaliada em T0, início do tratamento; em T1, final da terapia com o Bionator; e em T2, na observação à longo prazo (incluindo uma fase com aparelhos fixos). A idade média ao início do tratamento foi de 10 anos e 2 meses (T0); no pós-tratamento foi de 12 anos e 3 meses; e no acompanhamento à longo prazo de 18 anos e 2 meses (CVM 6). O grupo controle constou de 22 indivíduos (11 meninos e 11 meninas) sem tratamento da maloclusão de Classe II. As radiografias cefalométricas foram analisadas nos três tempos de observação para todos os grupos. A análise TPS avaliou estatisticamente (testes de permutação) as diferenças na forma e tamanho craniofacial entre os grupos bionator e controle. Resultados: A análise TPS mostrou que o tratamento com o bionator foi capaz de produzir alterações favoráveis na forma mandibular (deslocamento para frente e para baixo) que contribuiu significantemente para a correção da desarmonia dentoesquelética de classe II, e esses resultados observados à longo prazo são mantidos após cessar o crescimento. O grupo controle não apresentou diferenças estatísticamente significantes no sentido da correção da Classe II. Conclusões: Este estudo sugere que o tratamento com o bionator na Classe II mantém resultados favoráveis à longo prazo na forma craniofacial com a combinação de alterações dentoalveolares e esqueléticas.
Objective: To evaluate the long-term effects of the standard (Class II) Balters bionator in growing patients with Class II malocclusion with mandibular retrusion by using morphometrics (thin-plate spline [TPS] analysis). Material and Methods: Twenty-tree Class II patients (8 male and 15 female) were treated consecutively with the Balters bionator (bionator group). The sample was evaluated at T0, start of treatment; T1, end of bionator therapy; and T2, long-term observation (including fixed appliances). Mean age at the start of treatment was 10 years 2 months (T0); at posttreatment, 12 years 3 months (T1); and at long-term follow-up, 18 years 2 months (CS 6). The control group consisted of 22 subjects (11 males and 11 females) with untreated Class II malocclusions. Lateral cephalograms were analyzed at the three time points for all groups. TPS analysis evaluated statistical (permutation tests) differences in the craniofacial shape and size between the bionator and control groups. Results: TPS analysis showed that treatment with the bionator is able to produce favorable mandibular shape changes (forward and downward displacement) that contribute significantly to the correction of the Class II dentoskeletal imbalance and these results are maintained at long-term observation after completion of growth. The control group showed no statistically significant differences in the correction of Class II malocclusion. Conclusions: This study suggests that bionator treatment of Class II malocclusion maintains shape favorable results over the long-term with a combination of skeletal and dentoalveolar changes.
Gonçalves, Renata de Cassia [UNESP]. "Avaliação longitudinal do crescimento craniofacial de indivíduos classe II tratados e não tratados." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/110427.
Full textEsta pesquisa foi desenvolvida em três estudos. O 1º estudo teve o objetivo de avaliar o dimorfismo sexual e o padrão de crescimento dos ossos da mão e do punho e das vértebras cervicais, comparar os métodos de maturidade esquelética determinados pela avaliação da mão e punho e das vértebras cervicais e desenvolver um indicador quantitativo de maturação esquelética vertebral nos indivíduos brasileiros Classe II (n=32 crianças, 17F e 15M, de 7 a 9 anos). O Método Eklöf & Ringertz e o Método de Previsão de Maturação de Fishman foram utilizados para analisar a maturação esquelética carpal e o Método de Santos-Pinto foi usado para avaliar a maturação esquelética vertebral. Os resultados do trabalho mostraram que as meninas se desenvolvem mais precocemente do que os meninos, porém as alterações esqueléticas dimensionais são maiores nos meninos. Houve alta correlação entre o método carpal e o indicador quantitativo de maturidade esquelética da 3ª vértebra cervical. Foi concluído que há dimorfismo sexual entre meninos e meninas com maturação óssea mais precoce em meninas e com maiores alterações de crescimento nos meninos. A maturidade esquelética pode ser determinada quantitativamente tanto pelo método carpal quanto vertebral. Os 2º e 3º estudos tiveram como objetivo avaliar radiograficamente as alterações sagitais, verticais e transversais do tratamento em duas fases de indivíduos com má oclusão de Classe II divisão 1, levando-se em consideração a maturidade esquelética por meio da análise da Telerradiografia Lateral e da Radiografia Posteroanterior. A amostra dos dois estudos foi composta por 64 crianças com má oclusão de classe II divisão 1, na fase de dentadura mista, divididas em 2 grupos: tratado e controle, contendo 32 crianças cada um, sendo 17 meninas e 15 meninos, com idade média inicial de 9 anos. Os resultados do 2º estudo mostraram as...
This research was developed in three studies. The aim of the 1st study was to evaluate the sexual dimorphism and the growth pattern of the hand-wrist bones and the cervical vertebrae, to compare the skeletal maturation determined by hand-wrist and vertebral evaluations and to develop a quantitative indicator of the vertebral skeletal maturity in Class II Brazilian subjects (n=32 children, 17F and 15M, from 7 to 9 years old). The Eklöf & Ringertz Method and the Fishman Maturation Prediction Method were used to assess the hand-wrist maturity and the Santos-Pinto Method was used to evaluate the vertebral maturity. The findings showed the girls develop earlier than boys, but the skeletal changes are larger in boys. There was a high correlation between carpal method and quantitative indicator of the 3rd cervical vertebra skeletal maturity. It was concluded that there are sexual dimorphism between boys and girls with early maturation in girls and larger growth changes in boys. The skeletal maturity can be quantitatively determined both by the hand-wrist method as cervical vertebral methods. The 2nd and 3rd studies was to evaluate the sagittal, vertical and transverse radiographic changes of the treatment in two phases of patients with Class II division 1 malocclusion taking into account the skeletal maturity through analysis of Lateral and Posteroanterior cephalometric radiographies. The sample of two groups was composed by 64 children with Class II division 1 malocclusion in mixed dentition phase, divided into 2 groups: treated and control, each containing 32 children, 17 girls and 15 boys, mean age initial 9 years. The results of the 2nd study showed sagittal and vertical dentoskeletal changes induced by the 1st phase of two-phase treatment, such as maxillary restriction; increased mandibular length; increasing in the upper and lower anterior alveolar heights; reduction of the overjet and of the Class...
Gonçalves, Renata de Cassia. "Avaliação longitudinal do crescimento craniofacial de indivíduos classe II tratados e não tratados /." Araraquara : [s.n.], 2013. http://hdl.handle.net/11449/110427.
Full textBanca: Dirceu Barnabé Raveli
Banca: Luiz Gonzaga Gandini Junior
Banca: Daniela Gamba Garib Carreira
Banca: Arnaldo Pinzan
Resumo: Esta pesquisa foi desenvolvida em três estudos. O 1º estudo teve o objetivo de avaliar o dimorfismo sexual e o padrão de crescimento dos ossos da mão e do punho e das vértebras cervicais, comparar os métodos de maturidade esquelética determinados pela avaliação da mão e punho e das vértebras cervicais e desenvolver um indicador quantitativo de maturação esquelética vertebral nos indivíduos brasileiros Classe II (n=32 crianças, 17F e 15M, de 7 a 9 anos). O Método Eklöf & Ringertz e o Método de Previsão de Maturação de Fishman foram utilizados para analisar a maturação esquelética carpal e o Método de Santos-Pinto foi usado para avaliar a maturação esquelética vertebral. Os resultados do trabalho mostraram que as meninas se desenvolvem mais precocemente do que os meninos, porém as alterações esqueléticas dimensionais são maiores nos meninos. Houve alta correlação entre o método carpal e o indicador quantitativo de maturidade esquelética da 3ª vértebra cervical. Foi concluído que há dimorfismo sexual entre meninos e meninas com maturação óssea mais precoce em meninas e com maiores alterações de crescimento nos meninos. A maturidade esquelética pode ser determinada quantitativamente tanto pelo método carpal quanto vertebral. Os 2º e 3º estudos tiveram como objetivo avaliar radiograficamente as alterações sagitais, verticais e transversais do tratamento em duas fases de indivíduos com má oclusão de Classe II divisão 1, levando-se em consideração a maturidade esquelética por meio da análise da Telerradiografia Lateral e da Radiografia Posteroanterior. A amostra dos dois estudos foi composta por 64 crianças com má oclusão de classe II divisão 1, na fase de dentadura mista, divididas em 2 grupos: tratado e controle, contendo 32 crianças cada um, sendo 17 meninas e 15 meninos, com idade média inicial de 9 anos. Os resultados do 2º estudo mostraram as...
Abstract: This research was developed in three studies. The aim of the 1st study was to evaluate the sexual dimorphism and the growth pattern of the hand-wrist bones and the cervical vertebrae, to compare the skeletal maturation determined by hand-wrist and vertebral evaluations and to develop a quantitative indicator of the vertebral skeletal maturity in Class II Brazilian subjects (n=32 children, 17F and 15M, from 7 to 9 years old). The Eklöf & Ringertz Method and the Fishman Maturation Prediction Method were used to assess the hand-wrist maturity and the Santos-Pinto Method was used to evaluate the vertebral maturity. The findings showed the girls develop earlier than boys, but the skeletal changes are larger in boys. There was a high correlation between carpal method and quantitative indicator of the 3rd cervical vertebra skeletal maturity. It was concluded that there are sexual dimorphism between boys and girls with early maturation in girls and larger growth changes in boys. The skeletal maturity can be quantitatively determined both by the hand-wrist method as cervical vertebral methods. The 2nd and 3rd studies was to evaluate the sagittal, vertical and transverse radiographic changes of the treatment in two phases of patients with Class II division 1 malocclusion taking into account the skeletal maturity through analysis of Lateral and Posteroanterior cephalometric radiographies. The sample of two groups was composed by 64 children with Class II division 1 malocclusion in mixed dentition phase, divided into 2 groups: treated and control, each containing 32 children, 17 girls and 15 boys, mean age initial 9 years. The results of the 2nd study showed sagittal and vertical dentoskeletal changes induced by the 1st phase of two-phase treatment, such as maxillary restriction; increased mandibular length; increasing in the upper and lower anterior alveolar heights; reduction of the overjet and of the Class...
Doutor
Bigliazzi, Renato. "Estudo longitudinal das alterações dentoesqueléticas à longo prazo da má oclusão de classe II, divisão 1ª tratada com o Bionator de Balters utilizando-se a cefalometria radiográfica e a morfometria geométrica /." Araçatuba, 2013. http://hdl.handle.net/11449/104509.
Full textBanca: Osmar Aparecido Cuoghi
Banca: Paulo Henrique dos Santos
Banca: Kurt Faltin Júnior
Banca: Dirceu Barbane Ravali
Resumo: Objetivo: Avaliar os efeitos à longo prazo do tratamento com o bionator base (Classe II) de Balters de pacientes com maloclusão de Classe II e retrusão mandibular em crescimento usando-se a morfometria (análise de thin-plate spline [TPS]). Materiais e Métodos: Vinte e três pacientes (8 meninos e 15 meninas) foram consecutivamente tratados com o bionator de Balters (grupo bionator). A amostra foi avaliada em T0, início do tratamento; em T1, final da terapia com o Bionator; e em T2, na observação à longo prazo (incluindo uma fase com aparelhos fixos). A idade média ao início do tratamento foi de 10 anos e 2 meses (T0); no pós-tratamento foi de 12 anos e 3 meses; e no acompanhamento à longo prazo de 18 anos e 2 meses (CVM 6). O grupo controle constou de 22 indivíduos (11 meninos e 11 meninas) sem tratamento da maloclusão de Classe II. As radiografias cefalométricas foram analisadas nos três tempos de observação para todos os grupos. A análise TPS avaliou estatisticamente (testes de permutação) as diferenças na forma e tamanho craniofacial entre os grupos bionator e controle. Resultados: A análise TPS mostrou que o tratamento com o bionator foi capaz de produzir alterações favoráveis na forma mandibular (deslocamento para frente e para baixo) que contribuiu significantemente para a correção da desarmonia dentoesquelética de classe II, e esses resultados observados à longo prazo são mantidos após cessar o crescimento. O grupo controle não apresentou diferenças estatísticamente significantes no sentido da correção da Classe II. Conclusões: Este estudo sugere que o tratamento com o bionator na Classe II mantém resultados favoráveis à longo prazo na forma craniofacial com a combinação de alterações dentoalveolares e esqueléticas.
Abstract: Objective: To evaluate the long-term effects of the standard (Class II) Balters bionator in growing patients with Class II malocclusion with mandibular retrusion by using morphometrics (thin-plate spline [TPS] analysis). Material and Methods: Twenty-tree Class II patients (8 male and 15 female) were treated consecutively with the Balters bionator (bionator group). The sample was evaluated at T0, start of treatment; T1, end of bionator therapy; and T2, long-term observation (including fixed appliances). Mean age at the start of treatment was 10 years 2 months (T0); at posttreatment, 12 years 3 months (T1); and at long-term follow-up, 18 years 2 months (CS 6). The control group consisted of 22 subjects (11 males and 11 females) with untreated Class II malocclusions. Lateral cephalograms were analyzed at the three time points for all groups. TPS analysis evaluated statistical (permutation tests) differences in the craniofacial shape and size between the bionator and control groups. Results: TPS analysis showed that treatment with the bionator is able to produce favorable mandibular shape changes (forward and downward displacement) that contribute significantly to the correction of the Class II dentoskeletal imbalance and these results are maintained at long-term observation after completion of growth. The control group showed no statistically significant differences in the correction of Class II malocclusion. Conclusions: This study suggests that bionator treatment of Class II malocclusion maintains shape favorable results over the long-term with a combination of skeletal and dentoalveolar changes.
Doutor
Mendes, Lucas Marzullo. "Influência em longo prazo dos protocolos de tratamento da Classe II na atratividade do perfil." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-04062013-151108/.
Full textThe assumption that extraction treatment can impair the facial profile has discouraged this treatment protocol in Class II malocclusion. This study aimed to assess whether there is influence of three different treatment protocols for Class II division 1 in the profile attractiveness by the end of treatment and in the long-term. Cephalometric measurements were obtained from the radiographs through the software Dolphin Imaging 11.5 and comparisons were made among the three groups for the two times. The groups were divided according to the treatment protocol: without extraction (XP0), with extraction of 2 maxillary premolars (XP2) or extraction of 4 premolars (XP4). Sixty-eight full Class II division 1 treated patients, matched by sex, end of treatment age, long-term posttreatment age, occlusal outcomes (index Objective Grading System) and overjet (final and in the long-term) were evaluated. The group XP0 consisted of 20 subjects, on average 29.94 (± 7.35) years old and 15.62 (± 7.22) years posttreatment. The group XP2 was composed of 27 individuals on average 30.56 (± 5.74) years old and 15.09 (± 4.79) years posttreatment. The XP4 group comprised 21 individuals on average 32.29 (± 5.70) years old and 17.20 (± 5.76) years post-treatment. The lateral radiographs taken by the end of treatments and in the long-term resulted in two profile black silhouettes of each patient. Through a website, laymen (77) and orthodontists (77) assigned scores from 1 to 10 to the each silhouettes attractiveness, according to their personal criteria. Laypeople were more critical than orthodontists. Analysis of covariance revealed that the age or sex of the evaluators did not interfere on their opinions. Analysis of variance revealed that the facial pattern was slightly more vertical in the group XP4 compared to XP2. Twoway Analysis of Variance revealed that the profile attractiveness in XP2 was significantly higher than in XP4 by the end of treatments and in XP0 were similar to both. In the long-term the attractiveness in XP2 group were significantly higher than both groups XP0 and XP4. There were no significantly differences between the cephalometric changes in the posttreatment period.
Bittar, Ana Elise Lobo. "Estudo da correlação biomecânica entre desordens oclusais e desvio de coluna no plano sagital." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/82/82131/tde-15022008-134913/.
Full textThis study has evaluated biomechanicaly the effect of the resultant strength at the cervical column developed by an odonthologic orthopedical mechanic appliance installed in a class III of Angle patient during 6 months. The model for this study is a 10 years and 4 months old patient, during six months. The model for this study is a 10 years and 4 months old patient, male and white. By the intra-oral exam it was possible to observe that the patient had molars in class III of Angle, previous crossed bite, mixed teething and the superior arcade is atresical. By the radiographic evaluation with analysis from USP, Mac Namara, Bimler e Petrovic, was detected a malocclusion class III and a potential of bigger mandibular growth then jaw. By the model analysis, a positive differences in the transversal as well as in the antero-posterior region of both arcades. Panoramic radiological exams, lateral and thoracic vertebral column teleradiografic exams were done in order to elaborate a diagnosis and a treatment plan. Afterwards a disjunction from the superior arcade through a modified disjunctor was proposed and a maxilla tracking through a Petit facial mask, with intra oral gummy strings with a medium strength force (400gf). After using this mask for 6 months, about 14 hours a day, other cranial-cervical x rays were done to evaluate the new results. It\'s possible to observe that not only the crossed bite was corrected (clinically) but also the cervical column flexion from the patient with a compensatory cranial extension. A shortening of some extensor muscles of cervical column, analyzed in its osseous marks of origin and insertion, was also observed.
Lima, Darwim Vaz de. "Estabilidade da relação molar após o tratamento sem extração da má oclusão de classe II." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-02042009-155348/.
Full textThe stability of Class II malocclusion was widely studied, however, few studies evaluated relapse and stability of Class II molar relationship. This way, this study aimed to evaluate stability of molar relationship after nonextraction treatment of Class II malocclusion, in order to quantify the relapse and correlates it to some factors such the severity of initial Class II molar relationship, treatment time, retention time and time of postretention evaluation. Sample comprised 39 subjects (16 female; 23 male) with initial Class II malocclusion treated orthodontically without extractions, with fixed appliances. Mean age at the beginning of treatment was 12.94 ± 1.21 years, at the end of treatment was 15.14 ± 1.38 years and at postretention stage was 21.18 ± 2.65 years. Mean treatment time was 2.19 ± 0.83 years and mean time of posttreatment evaluation was 6.12 ± 2.23 years. To verify influence of severity of initial Class II molar relationship in stability of molar relationship, sample was divided into two groups, one presenting a half-cusp or 3/4-cusp Class II molar relationship, and other with full-cusp Class II molar relationship. In dental casts from initial, final and postretention stages, it was measured molar, first and second premolars and canine relationships. Data obtained were analyzed by dependent ANOVA, Tukey and Pearson\'s correlation tests, besides of independent t test between the two groups divided by severity of initial molar relationship. There was a small and not significant relapse of molar relationship of 0.12mm. The initial severity of the Class II molar relationship was not correlated to its relapse in the postretention period. When sample was divided into two groups, with half-cusp or 3/4 cusp, and full-cusp Class II molar relationship at the beginning of treatment, no difference in relapse of molar relationship was found between the two groups. It was concluded that correction of Class II molar relationship is stable and initial severity does not influence relapse of molar relationship.
Araki, Janine Della Valle. "Comparação cefalométrica da estabildiade do tratamento da má oclusão de Classe II realizado sem e com a extração de dois pré-molares superiores." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-19062007-110602/.
Full textClass II malocclusion treatment stability of nonextraction and twomaxillary premolar extraction protocols The purpose of this study was to compare the dental relationships stability of Class II malocclusion treatment with and without two-maxillary premolar extractions and the influence of dentoalveolar and skeletal cephalometric variables on the stability. Two groups consisting of 30 patients each with matching characteristics were compared. Lateral cephalograms were evaluated at the pretreatment, posttreatment and observation stages. The average posttreatment period was 8.2 years. Student\'s t test was used to compare the posttreatment period changes between the groups and the findings indicated that both groups presented similar changes of the overjet, overbite and molar relationship at the posttreatment period. Only the canine relationship showed greater posttreatment changes in the extraction group however, there were no intergroup significant differences in these variables at the observation stage. The cephalometric variables evaluated did not influence dental relationships stability.
Canuto, Luiz Filiphe Gonçalves. "Estudo comparativo cefalométrico das más oclusões de Classe II, divisão 1, completas, com sobressaliências normal e acentuada." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-25032010-161910/.
Full textThe purpose of this retrospective study was to compare the initial cephalometric characteristics of orthodontic patients presenting complete Class II division 1 malocclusions, with normal and increased overjet. The sample comprised 80 Brazilian subjects presenting bilateral complete Class II division 1 malocclusions, of both genders. The sample was divided into 2 groups according to the initial overjet: Group 1 (normal overjet) comprised 40 patients (17 female; 23 male) at a mean initial age of 13.89 years (s.d. = ±2.38) presenting positive overjet, smaller than 3 mm. Group 2 (increased overjet) comprised 40 complete Class II division 1 patients (21 female; 19 male), at a mean initial age of 13.54 years (s.d. = ±2.11 years), and overjet greater than 5 mm. The cephalometric measurements obtained for the two groups were analyzed by components and compared by independent t tests. The results showed that the overbite was significantly smaller in group 1 when analyzing the dental component. The effective length of the maxilla (Co-A) was significantly smaller in group 1, by the maxillary component evaluation. There were no significant differences between the groups in the mandibular component. However, there was a significantly better maxillomandibular relation in Class II subjects with normal overjet, based on the smaller mean values for the variables ANB and Wits obtained for the group 1. The craniofacial growth pattern presented a more vertical tendency in group 1, evidenced by significantly greater values for the variables SN.GoGn, FMA, PP.GoMe and SN.OP. The maxillary incisors in group 2 were buccally inclinated and protruded by the linear evaluation. The mandibular incisors showed more protrusion in group 1 when they were evaluated by the variable Li-AP. The facial soft tissue analysis showed that the lower lip was more prominent in subjects presenting Class II malocclusions with normal overjet.
Gravier, Pierre. "Orthodontie en technique linguale : traitement d'une malocclusion de classe ii division 1 d'angle avec extractions." Lyon 1, 1992. http://www.theses.fr/1992LYO1D064.
Full textJacob, Helder Baldi [UNESP]. "Avaliação do crescimento natural e induzido pelo aparelho extrabucal de thurow modificado em crianças hiperdivergentes com má-oclusão classe II, divisão 1 de angle." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/104477.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Introdução: O presente trabalho foi consubstanciado em três capítulos como se segue: Capitulo I – Mudanças verticais no crescimento craniofacial em indivíduos francocanadenses entre os 10 e 15 anos de idade; Capítulo II – Tratamento da má-oclusão de Classe II usando aparelho extrabucal com puxada alta, associado à cobertura acrílica maxilar: uma revisão sistemática; Capítulo III – Componentes dentários e esqueléticos da correção da má-oclusão Classe II associada à mordida aberta, induzidos pelo tratamento com o aparelho extrabucal de Thurow modificado. Proposição: O capitulo I propôs prover dados de referência para as mudanças de crescimento vertical, avaliar as associações entre as medidas comumente utilizadas para classificar o fenótipo do individuo, determinar se os indivíduos mantêm ou não sua classificação inicial após o período de crescimento e comparar as mudanças ocorridas entre os três fenótipos. O capitulo II propôs avaliar, na literatura, as mudanças esqueléticas e dentárias induzidas pelo tratamento com aparelho extrabucal associado à cobertura acrílica oclusal e às melhorias nas relações vertical e ântero-posterior. O capitulo III propôs avaliar as mudanças esqueléticas e dentárias induzidas pelo aparelho extrabucal de Thurow modificado. Material e Método: Capítulo I: foram incluídos 228 indivíduos adolescentes franco-canadenses (119 masculinos e 109 femininos) entre 10 e 15 anos de idade. Cada indivíduo apresentava pelo menos 4 telerradiografias em norma lateral seriadas dos 10 aos 15 anos de idade (1303 telerradiografias). Capitulo II: foi realizada uma busca sistemática da literatura por meio de critérios de inclusão e exclusão usando 18 bancos de dados eletrônicos e manuais. Capitulo III: foram avaliadas as mudanças naturais...
Introduction: The present study was consubstantiated in three chapters as follows: Chapter I – Craniofacial vertical changes in French-Canadians subjects between 10 to 15 years of age; Chapter II –Treatment of class II malocclusion using High-Pull Headgear with a splint: a systematic review; Chapter III- Dental and Skeletal components of class II open-bite treatment with a Modified Thurow Appliance. Material and Methods: Chapter I: data were collected from the sample of French- Canadians population. 228 adolescents subjects were included (119 male and 109 female) between 10-15 years of age. Each subject had at least four serial radiographs available. Additionally, the first and the last one radiographs were necessarily taken, respectively, at 10 and 15 years of age. Thus, 1303 lateral cephalograms were used. Chapter II: based on inclusion and exclusion criteria, four articles were selected from a literature research, in order to obtain the data. Chapter III: two groups were assessed. They were divided into experimental group (13 subjects) and a control group (22 subjects). Both groups had before treatment the same features as for age (8.85 years of age for the treated group and 8.82 for the untreated group), and as for mandible plane angle (35.97° for the treated group and 36.27° for the untreated group). The groups were followed up for 12 months. Proposition: The chapter I aimed to provide reference data for vertical growth changes, evaluate the associations among the measures commonly used to classify the patients phenotype. The chapter II, evaluated in literature, skeletal and dental changes occurred in class II malocclusion treatment, using High-pull headgear appliance with a splint and also the improvement on vertical and 21 anteroposterior relationships. The chapter III analysed skeletal and dental changes caused by... (Complete abstract click electronic access below)
Jacob, Helder Baldi. "Avaliação do crescimento natural e induzido pelo aparelho extrabucal de thurow modificado em crianças hiperdivergentes com má-oclusão classe II, divisão 1 de angle /." Araraquara : [s.n.], 2011. http://hdl.handle.net/11449/104477.
Full textAbstract: Introduction: The present study was consubstantiated in three chapters as follows: Chapter I - Craniofacial vertical changes in French-Canadians subjects between 10 to 15 years of age; Chapter II -Treatment of class II malocclusion using High-Pull Headgear with a splint: a systematic review; Chapter III- Dental and Skeletal components of class II open-bite treatment with a Modified Thurow Appliance. Material and Methods: Chapter I: data were collected from the sample of French- Canadians population. 228 adolescents subjects were included (119 male and 109 female) between 10-15 years of age. Each subject had at least four serial radiographs available. Additionally, the first and the last one radiographs were necessarily taken, respectively, at 10 and 15 years of age. Thus, 1303 lateral cephalograms were used. Chapter II: based on inclusion and exclusion criteria, four articles were selected from a literature research, in order to obtain the data. Chapter III: two groups were assessed. They were divided into experimental group (13 subjects) and a control group (22 subjects). Both groups had before treatment the same features as for age (8.85 years of age for the treated group and 8.82 for the untreated group), and as for mandible plane angle (35.97° for the treated group and 36.27° for the untreated group). The groups were followed up for 12 months. Proposition: The chapter I aimed to provide reference data for vertical growth changes, evaluate the associations among the measures commonly used to classify the patients phenotype. The chapter II, evaluated in literature, skeletal and dental changes occurred in class II malocclusion treatment, using High-pull headgear appliance with a splint and also the improvement on vertical and 21 anteroposterior relationships. The chapter III analysed skeletal and dental changes caused by... (Complete abstract click electronic access below)
Orientador: Ary dos Santos-Filho
Coorientador: Peter H. Buschang
Banca: Laurindo Zanco Furquim
Banca: José Fernando Castanha Henriques
Banca: Luiz Gonzaga Gandini Junior
Banca: Dirceu Barnabé Raveli
Doutor
Sakima, Patricia Panizzi Gimenes [UNESP]. "Previsibilidade das alterações do tecido mole em indivíduos dolicofaciais." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/104496.
Full textAs alterações do tecido mole, após tratamento ortodôntico-cirúrgicos, têm sido muito estudadas. Entretanto, a ausência de homogeneidade da amostra, a não consideração da direção do movimento cirúrgico dos maxilares e a utilização de proporções podem levar a informações imprecisas do movimento do tecido mole em relação ao tecido duro. Assim, avaliou-se alterações labiais de indivíduos leucodermas, verticais, portadores de má oclusão de Classe II, que haviam sido submetidos a cirurgia bimaxilar com rotação anti-horária do plano oclusal. Foram utilizadas telerradiografias em norma lateral, uma pré-cirúrgica imediata e outra pós-cirúrgica tardia de cada um dos 24 indivíduos pertencentes à amostra. Traçados cefalométricos foram realizados e digitalizados no programa cefalométrico Dentofacial Planner Plus versão 2,02. Constatou-se movimento anterior e superior dos tecidos duro e mole, além de alteração do comprimento e da espessura do lábio inferior. No teste de regressão múltipla foi observado o envolvimento de diversas variáveis na alteração dos lábios superior e inferior. Houve relação entre as respostas labiais e as alterações posicionais do tecido duro e morfológicas do tecido mole. Foram estabelecidas equações para predição dos movimentos horizontal e vertical de ambos os lábios em função destas alterações.
Soft tissue changes after orthodontic-surgery treatments have been already studied. However sample heterogeneity, non consideration of the direction of the surgical movement and the proportions to predict the soft tissue movements can lead to imprecise information of the soft tissue movement in relation to the hard tissue. Thus, the lips responses of vertical Class II white patients submitted to double jaw surgery with counter clockwise rotation were evaluated in a sample composed by 24 immediate pre surgical and 24 late post-surgical lateral cephalograms. Each pair of cephalograms was traced and digitized in the Dentalfacial Planner 2,02. The radiographic amplifications were corrected by the same software. Anterior and superior movements of the hard and soft tissues and length and thickness changes of the lower lip occurred. Multiple regression models showed that several variables influenced lips alterations. The lips responses were related to the positional changes of the hard tissue and the morphological alterations of the soft tissue. The prediction equations for horizontal and vertical movements of the lips were established.
Palomares, Nathália Barbosa. "Impacto das etapas do tratamento orto-cirúrgico na qualidade de vida de pacientes portadores de deformidades dentofaciais." Universidade do Estado do Rio de Janeiro, 2014. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=6973.
Full textPacientes portadores de deformidades dentofaciais podem relatar dificuldades de mastigação e fala, desordens temporomandibulares, preocupação com a imagem corporal e baixa autoestima. Frequentemente, buscam tratamento orto-cirúrgico pela motivação de obter melhora notável nos aspectos estético, funcional e psicossocial. A evidência atualmente disponível sobre os benefícios na qualidade de vida relacionada à saúde bucal desta modalidade terapêutica ainda não é conclusiva, devido à diversidade de metodologias adotadas entre os estudos existentes, majoritariamente realizados na América do Norte, Europa, Oriente Médio e Ásia. Logo, é essencial utilizar instrumentos específicos para avaliar os efeitos desta modalidade de tratamento também na vida diária dos pacientes brasileiros. O propósito do presente estudo transversal foi determinar o impacto que o tratamento orto-cirúrgico exerce sobre a percepção de qualidade de vida dos pacientes portadores de deformidades dentofaciais, bem como a influência exercida pelo gênero, idade, renda, escolaridade e características da má oclusão, nas quatro etapas inerentes a esta modalidade de tratamento: (1) Inicial; (2) Preparo ortodôntico para a cirurgia; (3) Pós-cirúrgico; e (4) Contenção (pós-tratamento). Duzentos e cinquenta e quatro pacientes foram entrevistados em três importantes centros de atendimento na cidade do Rio de Janeiro. A qualidade de vida foi avaliada pelos questionários OHIP-14 (Oral Health Impact Profile - Short Version) e pelo OQLQ (Orthognathic Quality of Life Questionnaire) em suas versões traduzidas e validadas para o português. A gravidade da má oclusão e autopercepção estética foram avaliadas com base no Índice de Necessidade de Tratamento Ortodôntico (IOTN) e pelo Índice de Estética Dental (DAI). A análise dos dados foi efetuada pelos testes qui-quadrado, Kruskal-Wallis e modelos de regressão binomial negativa múltipla. Os pacientes dos quatro grupos foram semelhantes em relação ao gênero (p = 0,463), escolaridade (p = 0,276) e renda familiar (p = 0,100). Entre os entrevistados houve o predomínio de mulheres, com ensino médio completo e renda familiar entre 2 e 3 salários mínimos, portadores de má oclusão de Classe III de Angle grave. No modelo de regressão binomial negativa ajustado para os fatores gênero, idade, renda familiar e escolaridade, a qualidade de vida aferida pelo OHIP-14 demonstrou que o grupo Inicial sofreu impactos mais negativos do que os grupos Pós-cirúrgico, Preparo e Contenção; o OQLQ indicou que o grupo Inicial sofreu impactos mais negativos do que os grupos Preparo, Pós-cirúrgico e Contenção, nesta sequência. Não foi detectada influência da idade, renda e escolaridade nestes resultados. Foi observado que o gênero feminino sofreu mais impacto negativo na qualidade de vida, principalmente nas dimensões relativas à função e a aspectos sociais. Concluiu-se que os pacientes que finalizaram o tratamento orto-cirúrgico apresentaram como benefícios menores impactos na qualidade de vida específica e relacionada à saúde bucal, melhor autopercepção estética e menor gravidade da má oclusão, em comparação aos pacientes nas etapas pré e pós-cirúrgica e aos pacientes portadores de deformidades dentofaciais em busca de tratamento.
Patients with dentofacial deformities may complain about having trouble chewing and speaking, temporomandibular joint disorders, dissatisfaction with their own appearance and low self-esteem. They frequently seek out orthosurgical treatment motivated by an expectation of a significant aesthetic, functional and psychosocial improvement. Evidence currently available is not yet conclusive about the benefits of orthognathic surgery towards Oral Health-Related Quality of Life (OHRQoL). This is due to a lack of consensus among the various methods used to measure the changes among the existing studies, mainly performed in North America, Europe, Middle East and Asia. Therefore the use of specific tools is important to evaluate the effects of this therapeutic modality on the daily life of Brazilian patients. The aim of this cross-sectional study was to assess the impact of orthosurgical treatment on patients perceptions of their OHRQoL, and the influence of gender, age, socioeconomic status, schooling and occlusal characteristics, at the four stages of this treatment modality: (1) Initial; (2) Pre-surgical orthodontic treatment; (3) Post-surgical; and (4) Retention (post-treatment). Two hundred and fifty-four patients were interviewed at three important local attendance centers in the city of Rio de Janeiro. Quality of life was evaluated by OHIP-14 (Oral Health Impact Profile - Short Version) and OQLQ (Orthognathic Quality of Life Questionnaire) translated and validated into Brazilian Portuguese. The severity of Malocclusion and aesthetic self-perception were assessed by IOTN (Index of Orthodontic Treatment Need) and DAI (Dental Aesthetic Index). Data analysis was performed using Chi-square and Kruskal-Wallis tests and negative binomial regression models. The four groups shared similar make up in terms of gender (p = 0.463), schooling (p = 0.276) and economic status (p = 0.100). Among those interviewed, there was a predominance of women, who had graduated from high school, and with family income of between two and three minimum wages, presenting severe Class III malocclusion. In the negative binomial regression model, adjusted for gender, age, family income and schooling, the OHRQoL evaluated by OHIP-14 demonstrated that the Initial group presented more negative impact than the Postsurgical, Pre-surgical or Retention groups; OQLQ showed that the Initial group suffered more negative impacts than the Pre-surgical, Post-surgical and Retention groups, in this sequence. Any influence of age, family income and schooling was not detected. The female gender showed more negative impact on the OHRQoL, primarily concerning dental function and social aspects. It was concluded that patients who completed orthosurgical treatment presented the benefit of less acute impacts on the OHRQoL, better self-perception of the aesthetic and less severe malocclusion, when compared to patients at pre and post-surgical stages and those individuals not treated for dentofacial deformities.
Tukasan, Paulo Cesar. "Estudo dos valores cefalometricos da analise craniofacial da Fundação Tweed em classe II, 1ª divisão de Angle." [s.n.], 2002. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287929.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: A pesquisa definiu os valores cefalométricos da Análise Craniofacial da Fundação Tweed, em amostra de brasileiros. O estudo constava de 212 radiografias cefalométricas de indivíduos, na faixa etária de 12 a 15 anos, as quais foram divididas em dois grupos: o Grupo Classe II, com 169 telerradiografias da cabeça em norma lateral, de indivíduos leucodermas com maloclusão de Classe II, 1a. divisão de Angle, de ambos os sexos (82 do sexo masculino e 87 do feminino); e o Grupo Controle, com 43 telerradiografias em norma lateral, de indivíduos com oclusão clinicamente excelente, também de ambos os sexos (21 do sexo masculino e 22 do feminino). As telerradiografias foram selecionadas no arquivo da Disciplina de Ortodontia, da Faculdade de Odontologia de Piracicaba, UNICAMP, previamente ao tratamento ortodôntico. Os resultados demonstraram não existir dimorfismo sexual dentro de cada grupo, o qual foi comprovado pelo Teste "t" de student. A análise exploratória ('+ ou ¿ ' 0,5 desvio padrão) tornou possível a determinação dos limites de tolerância e a elaboração da Tabela da Análise Craniofacial com os respectivos intervalos cefalométricos. Além de observar que não houve diferença estatisticamente significativa na posição de maxila entre os grupos estudados, ou seja, a maxila apresentou-se bem posicionada em relação à base do crânio. Por outro lado, a mandíbula apresentou-se retruída em relação à base do crânio nos casos de Classe II.O padrão esquelético não ficou definido pois somente o IAF apresentou um padrão vertical na Classe II, enquanto os valores de Eixo Y, SN.PIO, SN.GoMe e FMA não apresentaram diferença estatisticamente significativa entre os grupos estudados. A Classe II, 1.a divisão, apresentou os incisivos inferiores mais inclinados para vestibular e o perfil facial convexo
Abstract: The research defined the cephalometric values of the Craniofacial Analysis of the Tweed Foundation where in Brazilian sample entered the study. This study consisted of 212 cephalometric radiographs from subjects, in the 12-15 age group, which were divided in two groups: the Group Class II,with 169 head lateral norm teleradiographs from Caucasian subjects, with Angle Class II , division 1 malocclusion, of both sexes (82 males and 87 females); and the Control Group, with 43 lateral norm teleradiographs from subjects whose occlusjon was clinically considered excellent., and also of both sexes (21 males and 22 females). The teleradiographs were selected from the file of the Orthodontic Area, of the Faculty of Dentistry of Piracicaba - UNICAMP, previously to the orthodontic treatment. The results demonstrated not to exist sexual dimorphism inside each group, which was proved by the Student's "t" test. The exploratory analysis ('+ or -' 0,5 standard deviation) made it possible to determine the tolerance limits and to elaborate on the Craniofacial Analysis Table with the respective cephalometric intervals. In addition to this, it was observed that the diffe,rence between the two studied groups, was not statiscally significant according to the maxilla position, in other words, the maxilla reported itself in a good position in relation to the cranial base. On the other hand, the mandible reported itself in a retruded position in relation to the cranial base in the Class II cases. The skeletal pattern was not defined because only the IAF reported a vertical pattern in Class II, while the Y Axis, SN.PIO, SN.GoMe and FMA values did not report any difference statistically significant between the studied groups. The Class II, division 1, reported the lower incisors more labially tipped and the convex facial profile
Doutorado
Doutor em Ortodontia
Dib, Luana Paz Sampaio [UNESP]. "Avaliação das mudanças esqueléticas e dentárias naturais e induzidas pelo aparelho de Herbst em indivíduos classe II na fase pré-pubertária." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/104480.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A pesquisa foi desenvolvida em três estudos. O 1º estudo foi uma revisão sistemática cujo objetivo foi avaliar as informações existentes na literatura mundial sobre as alterações dentárias e esqueléticas induzidas pelo uso do aparelho de Herbst no tratamento da Classe II na fase da dentadura mista. As bases de dados eletrônicas Scopus, Pub Med, Medline, Biblioteca Cochrane, Lilacs, Scielo foram pesquisadas no intuito de selecionar artigos pertinentes ao assunto que se enquadravam dentro dos critérios de inclusão estabelecidos. O 2º e o 3° estudo tiveram como objetivo diferenciar as alterações dentárias e esqueléticas sagitais e verticais, respectivamente, naturais e induzidas pelo tratamento associado Herbst e Trainer for Kids (T4K), utilizando a análise modificada “pitchfork” de Johnston. Uma amostra de 44 indivíduos pré-pubertários com má oclusão Classe II Divisão 1 foi utilizada, sendo dividida em 2 grupos: grupo tratado com o aparelho de Herbst (n=22) e grupo controle (n=22). A análise estatística dos dados do 2º e 3º estudo foi realizada por meio do teste t de Student, com nível de significância de 5%. O 1° estudo concluiu que o aparelho de Herbst induziu alterações dentárias e esqueléticas em indivíduos na dentadura mista. O 2° e o 3° estudo concluíram que o tratamento precoce da Classe II utilizando o aparelho de Herbst associado ao Trainer for Kids (T4K) induziu alterações predominantemente dentoalveolares
The research was developed in three studies. The first study consisted of a systematic review aiming to evaluate existing information in world literature on dental and skeletal Changes Induced by the Herbst Appliance and Natural on Class II Individuals in mixed dentitions phase. The electronic data base Scopus, Pub Med, Medline, Cochrane Library, Lilacs and Scielo were consulted for the purpose of selecting articles regarding to the subject that meets the requirements of the established inclusion criterion. The second and third studies aimed to distinguish the sagittall and vertical dental and skeletal changes, respectively, natural and induced by the associated treatments Herbst and Trainer for Kids (T4K) using Johnston`s “Pitchfork” modified analysis. It was taken a sample of 44 individuals in pre-puberty phase with Class II, division 1 malocclusion. The sample was divided into two groups: (1) group treated with the Herbst Appliance (n=22); (2) control group (n=22). The statistical analysis of the data for the second and third studies were carried out by means of t-student test, showing significance level of 5%. The first study concluded that the Herbst Appliance induced to dental and skeletal changes on individuals in mixed dentition phase. The second and third studies concluded that anticipated treatment of the Class II using Herbst appliance associated to Trainer for Kids treatments induced to changes, predominantly dentoalveolar changes
Dib, Luana Paz Sampaio. "Avaliação das mudanças esqueléticas e dentárias naturais e induzidas pelo aparelho de Herbst em indivíduos classe II na fase pré-pubertária /." Araraquara : [s.n.], 2011. http://hdl.handle.net/11449/104480.
Full textBanca: Ary dos Santos-Pinto
Banca: Lídia Parsekian Martins
Banca: Arnaldo Pinzan
Banca: Francisco Antônio Bertoz
Resumo: A pesquisa foi desenvolvida em três estudos. O 1º estudo foi uma revisão sistemática cujo objetivo foi avaliar as informações existentes na literatura mundial sobre as alterações dentárias e esqueléticas induzidas pelo uso do aparelho de Herbst no tratamento da Classe II na fase da dentadura mista. As bases de dados eletrônicas Scopus, Pub Med, Medline, Biblioteca Cochrane, Lilacs, Scielo foram pesquisadas no intuito de selecionar artigos pertinentes ao assunto que se enquadravam dentro dos critérios de inclusão estabelecidos. O 2º e o 3° estudo tiveram como objetivo diferenciar as alterações dentárias e esqueléticas sagitais e verticais, respectivamente, naturais e induzidas pelo tratamento associado Herbst e Trainer for Kids (T4K), utilizando a análise modificada "pitchfork" de Johnston. Uma amostra de 44 indivíduos pré-pubertários com má oclusão Classe II Divisão 1 foi utilizada, sendo dividida em 2 grupos: grupo tratado com o aparelho de Herbst (n=22) e grupo controle (n=22). A análise estatística dos dados do 2º e 3º estudo foi realizada por meio do teste t de Student, com nível de significância de 5%. O 1° estudo concluiu que o aparelho de Herbst induziu alterações dentárias e esqueléticas em indivíduos na dentadura mista. O 2° e o 3° estudo concluíram que o tratamento precoce da Classe II utilizando o aparelho de Herbst associado ao Trainer for Kids (T4K) induziu alterações predominantemente dentoalveolares
Abstract: The research was developed in three studies. The first study consisted of a systematic review aiming to evaluate existing information in world literature on dental and skeletal Changes Induced by the Herbst Appliance and Natural on Class II Individuals in mixed dentitions phase. The electronic data base Scopus, Pub Med, Medline, Cochrane Library, Lilacs and Scielo were consulted for the purpose of selecting articles regarding to the subject that meets the requirements of the established inclusion criterion. The second and third studies aimed to distinguish the sagittall and vertical dental and skeletal changes, respectively, natural and induced by the associated treatments Herbst and Trainer for Kids (T4K) using Johnston's "Pitchfork" modified analysis. It was taken a sample of 44 individuals in pre-puberty phase with Class II, division 1 malocclusion. The sample was divided into two groups: (1) group treated with the Herbst Appliance (n=22); (2) control group (n=22). The statistical analysis of the data for the second and third studies were carried out by means of t-student test, showing significance level of 5%. The first study concluded that the Herbst Appliance induced to dental and skeletal changes on individuals in mixed dentition phase. The second and third studies concluded that anticipated treatment of the Class II using Herbst appliance associated to Trainer for Kids treatments induced to changes, predominantly dentoalveolar changes
Doutor
Porto, Vanessa Scherer. "Estudo cefalométrico dos efeitos do tratamento ortodôntico sem e com extrações nas estruturas dentoesqueléticas e tegumentares em dolicofaciais." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-22042009-111941/.
Full textThe objective of this retrospective study was to compare the dentoalveolar and soft tissues changes with extraction/nonextraction treatment in dolichofacials. Groups 1 and 2 consisted of 23 Class II, division 1 malocclusion dolichofacial patient each, with 12.36 and 12.29 years of age, respectively. Group 1 was treated without any extraction and group 2 was treated with four first premolar extractions and both groups used occipital headgear. Groups 1 and 2 were matched with regard to age, treatment time, gender and malocclusion severity. Dependent t tests were used to evaluate the changes in each group and t tests were used to compare the changes between groups. Extraction treatment showed greater skeletal facial convexity and maxillomandibular relationship correction and incisor retraction. Both treatments did not influence the growth pattern. Facial height changes and molar extrusion were similar in both groups, and the maxillary molar mesialization was significantly greater in the extraction group. Extraction treatment showed greater tegumental facial profile convexity reduction, nasolabial angle increase, labial retraction and interlabial gap reduction. It was concluded that extraction treatment is more indicated in dolichofacials patients that need greater facial convexity reduction, incisor retraction and improvement in passive lip seal.
Patel, Mayara Paim. "Estudo cefalométrico comparativo do tratamento da má oclusão de Classe II com os distalizadores Pendulum e Jones Jig seguidos do aparelho fixo corretivo." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-02062011-104210/.
Full textThe purpose of this study was to compare cephalometric skeletal and dentoalveolar effects in the treatment of Class II malocclusion with Pendulum and Jones jig appliances, followed by fixed orthodontic appliances, and to compare it to a control group. Group 1 comprised 23 Class II patients treated with the Pendulum and fixed appliances; being that the total number of patients,19 were compared to the Jones jig group, at a mean initial age of 13.86 years; 18 patients were compared with the Jones jig and control groups, at a mean initial age of 13.92 years. Group 2 comprised 25 Class II patients treated with the Jones jig and fixed appliances, at a mean initial age of 12.90 years, compared to Pendulum and control groups; however, only 21 patients were compared only to the Pendulum group, at a mean initial age of 13.08 years. Patients were divided in this way in order to match average initial age and length of treatment, giving reliability to the comparative study. Group 3 comprised 19 young subjects with untreated Class II malocclusions. The two experimental groups were individually evaluated by dependent ANOVA and Tukey tests, to verify the intragroup changes among the initial (T1), postdistalization (T2) and end of fixed appliance (T3) stages. The experimental groups were also compared with t tests in the three times evaluated and the changes between T2-T1 and T3-T2. Finally, the experimental groups were compared to the control group by one-way ANOVA and Tukey tests in order to differentiate treatment changes from the craniofacial growth normal changes. Results showed that the appliances did not interfere in the maxillary and mandibular components, i.e., did not promote changes in the maxillomandibular relationship. Regarding the correction of the Class II, both devices promoted an efficient distalization of the maxillary first molars, but Jones jig group showed greater anchorage loss, represented by significant mesial movement and extrusion of the first and second premolars, probably due to differences in anchorage reinforcement and resulting in a greater increase in the LAFH at the end of treatment. The maxillary second molars after distalization were more angularly and linearly distalized and intruded than the Jones jig group. It was proved that the adverse effects that occurred during the intraoral distalization are subsequently corrected during the corrective mechanics. Compared to the control group at the end of orthodontic treatment, we observed that the Pendulum group had a greater maxillomandibular growth, probably justified by significant differences in the final ages between the groups. There was a significantly greater tipping of mandibular incisors and first molars in the experimental groups, probably due to the use of Class II elastics. At the end of treatment, it was observed the correction of the overjet and overbite in the experimental groups, changes already expected in the mechanical correction, however the distalization of maxillary molars followed by fixed corrective orthodontics did not promote significant changes in the soft tissue.
Simão, Tassiana Mesquita. "Influência das características cefalométricas na proporção de sucesso do tratamento da Classe II sem extrações e com extrações de dois pré-molares superiores." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-10092007-172100/.
Full textThe objective of this investigation was to compare the initial cephalometric characteristics of complete Class II, treated without extractions or 2 premolar extractions and to verify their influence in the occlusal success rate of these two treatment protocols. A sample of 84 records from patients with complete Class II division 1 malocclusion was divided into two groups with the following characteristics: Group 1 consisted of 31 patients treated without extractions at an initial mean age of 12.95 years; and Group 2 included 53 patients treated with 2 premolar extractions, with an initial mean age of 13.3 years. Initial and final occlusal status were evaluated on dental casts with Grainger?s treatment priority index (TPI) and the initial cephalometric characteristics were obtained on the pretreatment cephalograms. The initial cephalometric characteristics of the groups were compared by t test. A multiple linear regression analysis was used to evaluate the influence of all variables in the percentage of TPI reduction. The two maxillary premolar extraction cases presented a slight vertical growth pattern, maxillary and mandibulr incisior protrusion, greater maxillary incisor and molar dentoalveolar heights and greater upper and lower lip protrusion than the nonextraction group. However, the multiple linear regression analysis demonstrated that only the extraction protocol was significantly associated with the final occlusal status of the groups. It was concluded that the initial cephalometric characteristics of the groups did not influence the occlusal success rate of the two treatment protocols investigated.
Reis, Rachelle Simões. "Alterações cefalométricas produzidas pelos aparelhos Distal Jet e Pendulum no tratamento da má oclusão de Classe II." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-13122011-171434/.
Full textThis study compared, by analysis of lateral cephalograms, the dentoskeletal and soft tissue changes promoted by the intraoral distalizers Distal Jet and Pendulum, followed by corrective fixed appliances, compared to a control group. Group 1 was composed of 20 patients, being 15 females and 5 males, with initial mean age 12.77 ± 1.22 years (10.54 to 14.50) and the final mean age was 16.92 ± 1.37 years (14.90 to 19.09). These patients were treated with the intraoral distalizer Distal Jet followed by corrective fixed appliances for a mean period of 4.15 ± 0.66 years (2.35 to 5.07). Group 2 was composed of 15 patients, being 10 females and 5 males, with initial mean age 13.42 ± 1.32 years (11.18 to 14.86) and final mean age 17.77 ± 1.62 years (15.12 to 21.50), and was treated with the Pendulum appliance followed by fixed orthodontic appliances for a mean period of 4.41 ± 0.84 years (3.12 to 6.71). Group 3 comprised 16 patients, being 8 females and 8 males, with Class II malocclusion, not submitted to any orthodontic treatment. This group presented initial mean age 12.25 ± 1.38 years (10.10 to 14.95) and final mean age 15.98 ± 1.84 years (13.18 to 19.48). The mean follow-up period was 3.73 years ± 1.27 years (2.02 to 6.09). The patients were matched for age, period of treatment/follow-up, gender, severity of the Class II malocclusion and initial cephalometric variables. The initial and final ages, period of treatment/follow-up, initial and final cephalometric values and changes caused by treatment/follow-up time were analyzed by one-way analysis of variance (ANOVA) followed by the Tukey test. The distribution of genders and severity of malocclusion were analyzed by the chi-square test. The results of comparison of changes promoted by treatment/follow-up period between the three groups demonstrated that the distalizers Distal Jet and Pendulum did not interfere with the maxillary and mandibular components or the maxillomandibular relationship. These also did not cause significant changes in the vertical and soft tissue components; however, there was a significantly lower extrusion of the maxillary second molars in the Pendulum group compared to the control group. The maxillary incisors presented significantly greater lingual tipping in the Distal Jet group compared to the control group. There was a greater buccal tipping of mandibular incisors in the experimental groups, significant reduction of overjet and correction of molar relationship in the experimental groups compared to the control group.
Junqueira, Cintia Helena Zingaretti. "Influência de extrações de pré-molares na estética facial em longo prazo." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-05062013-151622/.
Full textThe assumption that extraction treatment can impair the facial profile with excessive retrusion has discouraged this treatment protocol. This study aimed to assess whether the nonextraction, extraction of two maxillary premolars and extraction of four premolars treatment protocols of Class II Division 1 are different regarding facial esthetics in the long-term. Frontal and lateral photographs of 63 patients, treated at least eight years ago, that initially presented complete Class II division 1 malocclusion, were divided into 3 groups as following: XP0 (non-extraction, n=20; 30,77 years, 15,63 years post-treatment), XP2 (2-maxillary premolar extractions, n=25; 30,99 years, 15,68 years post-treatment) and G3 (4-premolar extractions, n=18; 32,80 years of age, 18,01 years post-treatment). All groups were matched by gender, age, posttreatment time, final profile and occlusal outcomes (Objective Grading System Index), final and long-term overjets. Laypersons and orthodontists evaluated frontal and lateral photographs of the individuals, assigning scores from 1 to 10 to each ones attractiveness and opining about their apparent ages. Cephalometric soft tissue measures were obtained from the lateral photographs by the software Dolphin Imaging 11.5. Two-way Analysis of Variance revealed that both attractiveness and apparent age were not affected by treatment protocols, but by the type of evaluator. Laymen were slightly more critical then orthodontists. Analysis of covariance revealed that the age of the raters did not affect their opinions, but the genre did, as long as women assigned higher grades than did men. Analysis of variance showed no statistically significant differences between the three groups, except for the facial pattern, which was slightly larger in XP4. The Pearson correlation test revealed that none of the soft-tissue measures evaluated had influence on the facial attractiveness scores assigned to the sample. Therefore, it was concluded that treatment of complete Class II division 1 malocclusion with and without extractions had similar facial attractiveness in the long-term.
Miksza, Talita Farias [UNESP]. "Avaliação das modificações dentárias decorrentes da utilização do aparelho pêndulo." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/95805.
Full textObjetivo: comparar as alterações dentárias sofridas pelo primeiro molar superior e incisivo central superior, após a distalização molar em pacientes com má oclusão Classe II tratados com o aparelho pêndulo, além de avaliar a aceitação dos pacientes em relação ao dispositivo distalizador. Material e método: foram utilizadas telerradiografias em norma lateral de 19 pacientes Classe II, com idade inicial média de aproximadamente 17 anos, realizadas no pré-tratamento e após a obtenção ou suave sobrecorreção da relação molar de Classe I. Aplicou-se para cada variável o teste t de Student para amostras pareadas, avaliando os efeitos do tratamento. Resultados: a utilização do aparelho pêndulo inclinou a coroa do primeiro molar superior para distal. O incisivo superior inclinou discretamente para vestibular. A aceitação do aparelho pêndulo foi unânime entre os pacientes da amostra. Conclusão: o aparelho pêndulo é um dispositivo eficiente quando se trata de distalização e aceitação do paciente, porém para alcançar um resultado ideal é importante que os efeitos indesejados sejam controlados.
Objective: to compare the changes undergone by the maxillary first molar and central incisor after molar distalization in Class II patients treated with the pendulum appliance, and to evaluate the acceptance of patients relative to the distalizing. Methods: lateral cephalographs were taken before treatment and after obtaining a Class I molar relationship or sobrecorrection from 19 Class II patients with an initial mean age of 17 years. Was applied to each of the variables the Student t test for paired samples, evaluating the effects of treatment. Results: After using the pendulum appliance the maxillary first molars moved to distal the crown. The upper incisor has a slight slope to the buccal. The acceptance of the pendulum appliance was unanimous among the patients in the sample. Conclusion: The pendulum appliance is effective when the treatment objectives are distalization of the maxillary first molar and patient compliance, but for an ideal outcome to be achieved it is essential that the undesirable effects are controlled.
Silva, Filho Omar Gabriel da [UNESP]. "Crescimento facial espontâneo Padrão II: estudo cefalométrico longitudinal." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/95793.
Full textUniversidade Estadual Paulista (UNESP)
O presente estudo cefalométrico longitudinal investigou as alterações espontâneas ocorridas em crianças com má oclusão Classe II, divisão 1, Padrão II, em crescimento. Foram selecionadas 40 crianças, 20 meninos e 20 meninas, distribuídas na faixa etária compreendida entre 6 anos e 14 anos de idade. Para avaliar o comportamento das bases apicais, dos incisivos e do tecido mole, as seguintes grandezas cefalométricas foram mensuradas: SN.Ba, SNA, SNB, SND, SN.Pog, ANB, NAP, SN.PP, SN.GoGn, SN.Gn, Ar.Go.Gn, 1.PP, 1.NA, 1.SN, IMPA e ANL. As seguintes grandezas alcançaram significância estatística com o crescimento: SNB, SND, SN.Pog, ANB, NAP, SN.GoGn, SN.Gn, Ar.Go.Gn e IMPA. Os resultados demonstraram que as principais alterações quantitativas registradas estavam relacionadas com o crescimento mandibular, independentemente do sexo. A mandíbula deslocou-se para frente, com tendência de rotação no sentido anti-horário e com conseqüente redução nos ângulos de convexidade facial. No entanto, as oscilações quantitativas nas grandezas cefalométricas não foram suficientes para mudar a morfologia dentofacial ao longo do período de acompanhamento. Conclui-se, portanto, que a morfologia facial é definida precocemente e é mantida, configurando o determinismo genético na determinação do arcabouço esquelético.
The current longitudinal cephalometric study investigated the spontaneous alterations in growing Class II, division 1, Pattern II patients. Forty children (twenty boys and twenty girls) with ages ranging between 6 and 14 years were selected to comprise the sample. The behavior of the apical bases, incisors and facial profile was evaluated on the basis of the following cephalometric measurements: SN.Ba, SNA, SNB, SND, SN.Pog, ANB, NAP, SN.GoGn, SN.PP, SN.Gn, Ar.Go.Gn, 1.PP, 1.NA, 1.SN, IMPA and nasolabial angle. The following measurements were statistically significant along growth: SNB, SND, SN.Pog, ANB, NAP, SN.GoGn, SN.Gn, Ar.Go.Gn and IMPA. The results showed that the main quantitative alterations were related to mandibular growth, regardless of gender. The mandible was anteriorly displaced and tended to present a counter-clockwise rotation and consequent decrease in the facial convexity angles. However, the quantitative changes in the cephalometric measurements were not sufficient to change the dentofacial morphology during the follow-up period. Therefore, facial morphology seems to be defined early and does not change along growth.
Raveli, Taísa Boamorte [UNESP]. "Avaliação das alterações induzidas pelo aparelho de Herbst no tratamento da má oclusão de classe II de Angle em telerradiografia cefalométrica em norma de 45°." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/95764.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A presente pesquisa foi desenvolvida em dois estudos retrospectivos. O primeiro e segundo estudos avaliaram as alterações dentoesqueléticas induzidas pelo aparelho de Herbst em telerradiografias cefalométricas em norma de 45°. O primeiro estudo utilizou uma amostra de 49 indivíduos em período pré-pico de crescimento pubertário, sendo tratados (n=25) e controle (n=24), período de observação de 7 meses. O segundo utilizou uma amostra de 46 indivíduos em período pós-pico de crescimento pubertário, sendo tratados (n=23) e controle (n=23), período de observação de 8 meses. A análise estatística foi realizada por meio do teste t de Student. O primeiro estudo concluiu que não houve mudanças esqueléticas na fase pré-pico de crescimento pubertário, no perído de tratamento com o aparelho de Herbst e teve alterações dentárias, como mesialização do primeiro molar permanente inferior e distalização do primeiro molar permanente superior. A correção da Classe II se deu predominantemente por alterações dentoalveolares. O segundo estudo concluiu que não houve mudanças esqueléticas significantes na fase póspico de crescimento pubertário e teve alterações dentárias, como mesialização do primeiro molar permanente inferior. A correção da Classe II se deu predominantemente por alterações dentoalveolares
The present retrospective research was divided into two studies. The first and second studies evaluated dentoskeletal changes induced by the use of Herbst appliance through oblique radiographs. The first study had a sample of 49 individuals before peak of pubertal growth divided into treated (n=25) and control (n=24) observed during a 7 months period. The second study had a sample of 46 individuals after peak of pubertal growth divided intro treated (n=23) and control (n=23) observed during a 8 month period. Statistical analysis was made by Student’s t test. The first study concluded that there were no skeletal changes with the treated group before peak of pubertal growth, and there were dental changes as mesialization of lower first molars and distalization of upper first molars. The correction of class II was predominantely dental. The second study concluded that there were no significant skeletal changes with treated group after peak of pubertal growth, and there were dental changes as mesialization of lower first molars. The correction of class II was predominantely dental
Raveli, Taísa Boamorte. "Avaliação das alterações induzidas pelo aparelho de Herbst no tratamento da má oclusão de classe II de Angle em telerradiografia cefalométrica em norma de 45° /." Araraquara : [s.n.], 2011. http://hdl.handle.net/11449/95764.
Full textBanca: Lídia Parsekian Martins
Banca: Jorge Abrão
Resumo: A presente pesquisa foi desenvolvida em dois estudos retrospectivos. O primeiro e segundo estudos avaliaram as alterações dentoesqueléticas induzidas pelo aparelho de Herbst em telerradiografias cefalométricas em norma de 45°. O primeiro estudo utilizou uma amostra de 49 indivíduos em período pré-pico de crescimento pubertário, sendo tratados (n=25) e controle (n=24), período de observação de 7 meses. O segundo utilizou uma amostra de 46 indivíduos em período pós-pico de crescimento pubertário, sendo tratados (n=23) e controle (n=23), período de observação de 8 meses. A análise estatística foi realizada por meio do teste t de Student. O primeiro estudo concluiu que não houve mudanças esqueléticas na fase pré-pico de crescimento pubertário, no perído de tratamento com o aparelho de Herbst e teve alterações dentárias, como mesialização do primeiro molar permanente inferior e distalização do primeiro molar permanente superior. A correção da Classe II se deu predominantemente por alterações dentoalveolares. O segundo estudo concluiu que não houve mudanças esqueléticas significantes na fase póspico de crescimento pubertário e teve alterações dentárias, como mesialização do primeiro molar permanente inferior. A correção da Classe II se deu predominantemente por alterações dentoalveolares
Abstract: The present retrospective research was divided into two studies. The first and second studies evaluated dentoskeletal changes induced by the use of Herbst appliance through oblique radiographs. The first study had a sample of 49 individuals before peak of pubertal growth divided into treated (n=25) and control (n=24) observed during a 7 months period. The second study had a sample of 46 individuals after peak of pubertal growth divided intro treated (n=23) and control (n=23) observed during a 8 month period. Statistical analysis was made by Student's t test. The first study concluded that there were no skeletal changes with the treated group before peak of pubertal growth, and there were dental changes as mesialization of lower first molars and distalization of upper first molars. The correction of class II was predominantely dental. The second study concluded that there were no significant skeletal changes with treated group after peak of pubertal growth, and there were dental changes as mesialization of lower first molars. The correction of class II was predominantely dental
Mestre
Araújo, Adriano Marotta [UNESP]. "Estudo cefalométrico com implantes metálicos dos efeitos do aparelho Bionator de Balters no desenvolvimento esquelético maxilo-mandibular durante o tratamento da má oclusão classe II divisão 1." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/104534.
Full textO propósito desse estudo foi avaliar os efeitos transversais nos maxilares e o crescimento mandibular ântero-posterior após terapia com aparelho ortopédico funcional. A amostra foi composta por 25 pacientes (15 do gênero masculino e 10 do gênero feminino) com má oclusão de Classe II e idade variando entre 6.9 e 11.2 anos. Os pacientes foram aleatoriamente divididos em dois grupos, grupo controle (n=11) e grupo experimental (n=14) e acompanhados longitudinalmente por 12 meses. O tratamento foi exclusivamente executado com o aparelho bionator de Balters por um período de 12 meses. O método de sobreposição, com auxílio de implantes metálicos, foi realizado na avaliação das alterações esqueléticas transversais dos maxilares, crescimento condilar e remodelação óssea da mandíbula. Os resultados mostraram que os pacientes sem tratamento exibiram um aumento significante, em largura, entre os implantes maxilares posteriores, mas a diferença entre os implantes anteriores e mandibulares não foi estatisticamente significante. A distância entre os implantes posteriores, no sentido transversal, aumentaram significantemente para os dois grupos, com o grupo bionator mostrando um aumento significativo maior do que o grupo controle. O grupo bionator também mostrou uma maior expansão entre os implantes localizado na mandíbula, porém essa diferença não foi estatisticamente significante. Com relação ao crescimento condilar, os resultados mostraram um redirecionamento do crescimento (mais posterior), e semelhante quantidade de crescimento para os dois grupos. O tratamento com o aparelho bionator produziu um crescimento e remodelação óssea maior do que o esperado nas regiões condilar e goniana da mandíbula. Sobreposição na base do crânio mostrou um deslocamento anterior da mandíbula e uma pequena ou quase ausente rotação anterior... .
The purpose of this study was to describe transverse skeletal base adaptations and mandibular growth associated with bionator therapy. The sample included 25 patients (15 males and 10 females) between 6.9 and 11.2 years of age with Class II division 1 malocclusion. The patients were randomly allocated to either a control (n=11) or treatment (n=14) group. Treatment consisted of a bionator only, and the patients were following longitudinally for approximately 12 months. Using metallic implants for superimposition, transverse skeletal base adaptations, condylar growth and mandibular remodeling changes were evaluated. The results showed that untreated Class II controls exhibit significant increases between posterior maxillary implants, but no significant changes between the anterior maxillary or mandibular implants. While posterior maxillary implants increased significantly in both groups, the treated group showed significantly greater width increases than the control group. The treated group also showed greater increases between mandibular implants, but the differences were not statistically significant. Condylar growth in perspective, the results showed significant changes in the direction (more posterior) but not in the amount of overall amount of condylar growth. The bionator appliance produced greater than expected posterior drift of landmarks in the condylar and gonial regions. Cranial base superimposition showed greater than expected anterior mandibular displacement, but little or no true mandibular forward rotation with bionator therapy. In conclusion, the bionator appliance alone produces transverse skeletal adaptations, condylar growth redirection and remodeling changes associated with mandibular rotation and displacement.
Grec, Roberto Henrique da Costa. "Avaliação cefalométrica comparativa do tratamento da má oclusão de classe II como Distalizador First Class em ancoragem convencional e esquelética." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-27072011-104336/.
Full textThe aim of this prospective study was to evaluate the dental, skeletal and soft tissue changes in youngsters with Class II malocclusion treated with First Class distalizer in two different types of anchorage. Thirty patients were included and divided, randomly, in two groups of 15. G1 (5 boys and 10 girls) that received distalizers with conventional anchorage (Nance button) and G2 (10 boys and 5 girls) that received distalizers with skeletal anchorage supported in two palatal mini-implants, average age of 13.00 and 13.28 years old, respectively. Lateral cephalometric radiographs were taken before and after molar distalization in order to the cephalometric analysis. Statistical analysis was performed by dependent t test to verify the changes occurred in the same group and by independent t test to verify the difference between the groups. The systematic and casual errors were calculated as well. The mean treatment period was 4.51 and 6.28 months for G1 and G2, respectively. Both groups showed significant dental changes with distalization (G1=2.39 mm; G2=2.21 mm), distal tipping (G1=10.51º; G2=4.49º) and intrusion (G1=0.53 mm; G2=0.10 mm) of maxillary first molars, just intrusion in G2 was not significant. Anchorage loss showed similar in both groups with significant mesialization (G1=2.78 mm; G2=3.11 mm) and mesial tipping (G1=4.95°; G2=4.69°) of maxillary second premolars, significant protrusion (G1=1.55 mm; G2=1.94 mm) and proclination (G1=5.78°; G2=3.13°) of maxillary incisors and significant increase in overjet (G1=1.07 mm; G2=0.81 mm). Distalization mechanic did not interfere in skeletal and soft tissue measurements of patients. In both groups, the First Class distalizer corrected the molar relationship, however it showed anchorage loss effects in maxillary premolars and incisors even when associated to mini-implants. There was no significant difference between the groups on dental linear changes, however the dental angular changes were significantly lower in skeletal anchorage group.
Navarro, Jugo Eddy Eder. "Avaliação das alterações anteroposterior e transversal produzidas pelo uso dos aparelhos funcionais Bionator e Klammt no tratamento da má oclusão de Classe II, divisão 1 de Angle, por meio de modelos digitais /." Araraquara, 2018. http://hdl.handle.net/11449/155937.
Full textResumo: O objetivo de evitar a progressão da má oclusão e propiciar um crescimento craniofacial mais harmonioso. Os ativadores monoblocos e elásticos induzem o posicionamento terapêutico anterior da mandíbula para correção da má oclusão de Classe II podendo expandir ou não as arcadas dentárias para melhorar a forma dos arcos e promover o alinhamento dentário. O objetivo deste estudo foi avaliar os efeitos do tratamento ortopédico funcional, sobre as relações anteroposteriores e transversais dos arcos dentários no tratamento da má oclusão de classe II com dois tipos de aparelhos ortopédicos funcionais, o Bionator de Balters e o Ativador elástico de Klammt utilizando modelos de estudo digitais. Foram coletadas as documentações ortodônticas de 15 indivíduos com má oclusão de Classe II divisão 1 acompanhados pelo período de 1 ano sem tratamento (grupo controle) e de 30 indivíduos com má oclusão de Classe II divisão 1 tratados com os dois tipos de aparelhos ortopédicos funcionais e acompanhados pelo período de 1 ano (grupo tratado). Modelos em gesso iniciais e após 1 ano de controle ou tratamento foram digitalizados no Scanner 3D R700 e obtidas as medidas de relação oclusal interarcos e das dimensões dos arcos com auxílio do software 3Shape's OrthoAnalyzer™ Advanced Orthodontic Diagnosis and Treatment Planning. As medidas obtidas foram transferidas para o programa SPSS (versão16, SPSS, Chicago, Ill) para análise estatística. Trabalho 1: O tratamento com o aparelho Bionator pode promover r... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The objective to avoid the progression of the malocclusion and enable a more harmonious craniofacial growth. The monobloc and the elastic activator induce the mandible to an anterior therapeutic positioning to treat the Class II malocclusion and have different capabilities to expand or not the dental arches to improve the arch form and to promote the dental aligns. The aim of this study was to evaluate the differences in the antero-posterior and transverse dental arch relationship after orthopedic treatment of the Class II malocclusion two types of functional orthopedic appliances (Bionator of Balters and Elastic activator of Klammt) using digital study models. Orthodontic dental records of 15 individuals Class II division 1 malocclusion followed for one year without treatment (control group) and 30 individuals with Class II division 1 malocclusion treated with the two functional orthopedic appliances (Bionator of Balters and Elastic activator of Klammt) and followed for one year (treated group). Initial and final dental casts of these individuals will be digitalized in the 3D R700 Scanner and measurements of the interarch occlusal relationship and of the dimensions of arches were evaluated. The data was assessed through Descriptive Statistic and t test and analysis of variance (anova) statistical analysis. Paper 1: The treatment with the Bionator device can promote a significant reduction in the lower arch perimeter, with an increase in the lower incisor irregularity (increa... (Complete abstract click electronic access below)
Mestre
Silva, Lucas Nunes Bastos Curty. "Estudo comparativo do tempo de tratamento em pacientes com e sem apinhamento nos casos de má oclusão de Classe II tratados com extrações de quatro pré-molares." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-03092013-162147/.
Full textThe objective of this study was to compare the treatment time of bilateral complete Class II malocclusion with and without crowding treated with four premolar extractions, The sample was selected from arquive of beginning models and pastes of pacients treated at Bauru Dental School, department of Orthodontics. The selected sample was composed by 57 patients and divided into two groups. Group 1 presented no crowding or crowding 0-3 mm was composed by 23 patients being 11 male and 12 female with a mean age of 13,13 years (minimum age 10,67 and maximum age 18,25). Group 2 presented crowding 4 mm or more was composed by 34 patients being 19 male and 15 female with a mean age of 13,07 years (minimum age of 11,08 and maximum age of 18,33). To compare treatment times between groups, t test was performed. Results demonstrated that there was not significantly difference in treatment times of group 1 (2,51 years) and 2 (2,49 years). Thus, the results support the idea the principal factor responsible for similarity treatment times is the need of the molar relationship correction, which is similar in both groups.
Cabrera, Laura de Castro. "Efeitos cefalométricos produzidos pelo uso do distalizador Carrière após a distalização de molares." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-14072011-110114/.
Full textThe Carriere Distalizer is a relatively new intraoral distalizing appliance developed by Dr. Luìs Carrière. The appliance represents an evolution of the modular segmented arch technique. Although impressive clinical results have been demonstrated with the Carriere Distalizer, no scientific research has been performed to date. Therefore, the goal of this study was to evaluate the cephalometric effects of the Carrière Distalizer while correcting Class II malocclusions without extractions. The sample consisted of 22 patients with a mean age of 14.33 years. For each patient, a cephalometric radiograph was evaluated for the Carriere Distalizer treatment period (pre-treatment and post-treatment), which averaged 0.56 years. Both the skeletal and dentoalveolar components were evaluated. The pre- and posttreatment values were compared using a student t test with a significance value of 0.05. For the skeletal components, the results revealed a significant decrease in the anteroposterior skeletal discrepancy (wits measurements) and a significant increase in the lower anterior face height (AFAI). For the dentoalveolar components, the upper first premolars distalized slightly, but with more distal tipping (4.SN) than translation (4-PTV). The upper molars underwent significant distal tipping (6.SN), translation (6- PTV), and intrusion (6-PP), although the distal translation was slightly less. The lower incisors proclined (IMPA, 1-PTV, 1-NB, 1.NB) significantly. The lower first molars also showed significant mesial movement (6-PTV) and extrusion (6-GoMe). The monthly distalization rate of the Carrière Distalizer was 0.27 mm per month for the upper first molar and 0.17mm per month for the upper second molar. The molar relationship, overjet, and overbite all underwent a significant correction resulting in a Class II to a Class I correction.
Lima, Karina Jerônimo Rodrigues Santiago de. "Comparação das alterações dentoesqueléticas promovidas pelos aparelhos Jasper Jumper e Ativador combinado à ancoragem extrabucal seguido de aparelho fixo, no tratamento da Classe II, 1ª divisão." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-19062007-143047/.
Full textThis study compared the effects of treatment of Class II division 1 malocclusion with the Jasper Jumper and Activator-headgear combination, followed by fixed appliances. The study sample comprised 72 young individuals, divided into three groups: Study group 1, composed of 25 patients with initial mean age of 12.72 years, treated with the Jasper Jumper appliance associated with fixed appliances for a mean period of 2.15 years; Study group 2, composed of 25 patients with initial mean age of 11.07 years, treated with the Activatorheadgear combination followed by fixed appliances, with a mean treatment time of 3.21 years; and the Control group, composed of 22 young individuals, with initial mean age of 12.67 years, and followed for a mean period of 2.13 years. The initial and final lateral cephalograms of individuals in the three groups were evaluated. The changes of all cephalometric variables in the group treated with the Activator-headgear combination were annualized and then compared to the changes observed for the other groups, by analysis of variance and the Tukey test. It was observed that both treatments presented a restrictive effect on the maxilla, without changes in mandibular growth, yet promoted a tendency of clockwise mandibular rotation and a slight increase in lower anterior facial height. The maxillary incisors were retruded in both study groups, lingually tipped in Study group 2 and extruded in Study group 1. Both groups exhibited distalization of maxillary molars. The mandibular incisors presented protrusion and limitation of vertical development in patients treated with the Jasper Jumper appliance, and buccal tipping for individuals in Study group 2. The mandibular molars were extruded in both study groups and presented mesial movement in the group treated with the Jasper Jumper appliance. Both appliances provided significant improvement of maxillomandibular relationship, overjet, overbite and molar relationship.
Nakamura, Alexandre Yudy. "Comparação dos resultados oclusais e da eficiência do tratamento das más oclusões de classe I e classe II completa com extrações de quatro pré-molares." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-06102008-113237/.
Full textThe objective of this retrospective study was to compare the occlusal outcomes and the treatment efficiency in the treatment of the Class I and Class II complete malocclusions, both treated with extraction of four premolars. The treatment efficiency was defined as the percentage of occlusal changes by the treatment time. The Group 1, composed by 75 patients who presented initially Class I malocclusion, presented initial mean age of 13.98 years (S.D.: 2.08, min.: 10.54 years and max.: 23.13 years), and the Group 2, composed by 32 patients who presented initially complete Class II, bilateral, presented initial mean age of 13.19 years (S.D.: 1.58, min.: 10.48 years and max.: 18.58 years). The occlusal evaluations were accomplished in study models of the patients in the initial and final phases using the indexes PAR and TPI. The occlusal indexes, the treatment time and efficiency of the groups were compared with the t test. The results demonstrated that the Group 1 achieved better occlusal outcomes and greater percentage of occlusal changes than the Group 2. However, there was no significant difference in the treatment time and efficiency in the treatment protocols between the groups considered.
Valarelli, Danilo Pinelli. "Estudo comparativo do tempo de tratamento de casos com má oclusão de classe II tratados ortodonticamente com extrações de quatro pré-molares e sem extrações." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-14062007-135505/.
Full textThe purpose of this retrospective study was to compare the treatment time of complete Class II malocclusion treated nonextraction and with four-premolar extraction protocols. For that purpose, ninety-one patients were selected and divided into two groups, according to the extraction criteria. Group 1, treated with four premolar extractions consisted of 48 patients (27 male; 21 female) with a mean age of 13.03 years. Group 2, treated nonextraction consisted of 43 patients (22 male; 21 female) with a mean age of 12.64 years. The IPT, Index of Priority of Treatment, was calculated in the initials and finals dental casts of those patients to quantify the initial malocclusion and the final occlusion. Treatment times of the groups were compared by means of the t test. Results demonstrated that treatment time was not significantly different between the treatment protocols. It was speculated that the main responsible factor for the similarity among the nonextraction and with four-premolar extraction protocols treatment times is the need of the molar relationship correction, which is similar in both protocols.