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Bauer, Thomas J. "Maxillary central incisor crown-root relationships in Class I normal occlusions and Class II division 2 malocclusions." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4572.
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Introduction: The purposes of this study were several. The first was to establish a mean value for the crown-to-root angle, or collum angle (CA), for maxillary central incisors in Class I normal occlusions. The second was to create a new crown-to-root angle based on anatomic points, the labial crown-root angle (LCRA), and correlate it with the CA for Class I normal occlusions and Class II division 2 malocclusions. Third, torque values were measured for maxillary central incisors using these anatomic points, and mean values were calculated for Class I normal occlusions and Class II division 2 malocclusions. Finally, mean values for CA and LCRA were analyzed for Class I normal occlusions and Class II division 2 malocclusions to detect differences between the two groups. Methods: 51 Class I normal samples and 42 Class II division 2 samples who met the inclusion criteria were studied cephalometrically. Relevant landmarks were placed, analyzed for reliability, and recorded for the measurements of interest. Results: The mean CA for Class I normal occlusions was not statistically different from zero (p= .0657). A strong increasing correlation between CA and LCRA was found for all samples (Pearson's correlation coefficient = 0.88, p < .0001). Mean torque values for Class I normal occlusions and Class II division 2 malocclusions were statistically different (3.95±10.85 degrees vs. 12.54±5.82 degrees, p < .0001). The mean CA for Class I normal occlusions and Class II division 2 malocclusions were statistically different (4.29±5.77 degrees vs. 1.78±3.94 degrees, p = .0178). The mean LCRA for Class I normal occlusions and Class II division 2 malocclusions were statistically different (31.60±4.24 degrees vs. 34.84±5.95 degrees, p = .00037). Conclusions: The mean CA in Class I normal occlusions is not statistically different from zero degrees. The LCRA is strongly correlated with the CA in both Class I normal occlusions and Class II division 2 malocclusions. The mean maxillary central incisor torque values for Class I normal occlusions is similar to that found in bracket prescriptions currently offered. Patients with Class II division 2 malocclusion exhibit statistically higher mean CA and LCRA values than patients with Class I ideal occlusion.
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Pereira, Pedro Mariano. "Diferentes formas de manifestação da retroinclinação incisiva na Classe II Divisão 2 – Estudo epidemiológico, genético e morfológico." Doctoral thesis, Faculdade de Medicina Dentária da Universidade do Porto, 2012. http://hdl.handle.net/10400.26/6285.
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Tisnado, Florián Carlos Ignacio. "Maloclusión clase II división 2 de Angle." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2011. https://hdl.handle.net/20.500.12672/15174.
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Manifiesta que la moloclusión Clase II de Angle, es un grupo pequeño, pero en crecimiento de las anormalidades dentofaciales, que muestra una evidencia genética en su origen. Estudios recientes sobre herencia, estiman que un 10 a 15% de los pacientes de ortodoncia, poseen anormalidades determinadas genéticamente que resultan en maloclusión. Estos genes muchas veces actúan en combinación, presentando hipodoncia, infraoclusión, caninos desplazados, transposiciones, discrepancia esquelética Clase III, sobremordida II/2. (14).Trabajo académico
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Tolentino, Solís Freddy Antonio. "Tratamiento de una maloclusión clase II división 2 y reabsorción radicular con técnica Meaw." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2015. https://hdl.handle.net/20.500.12672/13719.
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El documento digital no refiere asesorPresenta el tratamiento de una maloclusión clase II división 2 y reabsorción radicular con técnica MEAW. Describe los procedimientos y complicaciones presentados durante el tratamiento y los cambios faciales posteriores.
Trabajo académico
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Borja, Sihuinta Fadiath Talitha. "Tratamiento ortodóntico de una maloclusión de clase II división 2 subdivisión derecha sin extracciones." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2018. https://hdl.handle.net/20.500.12672/9148.
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El documento digital no refiere asesorReporta el tratamiento ortodóncico de una maloclusión de Clase II división 2 subdivisión derecha sin extracción de un paciente adulto. Para realizar un buen diagnóstico, es necesario una historia médicoestomatológica completa, con estudios auxiliares (fotografías, modelos de estudios articulados y radiografías). La planificación del tratamiento estará determinada por el análisis clínico-estomatológico para seleccionar el mejor protocolo de tratamiento y evaluando la repercusión en los tejidos blandos. El tratamiento sin extracciones debe ser considerado como una alternativa de tratamiento dependiendo de las características clínicas iniciales del paciente.
Trabajo académico
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AraÃjo, Maria Walderez Andrade de. "Effectiveness of Thurow modified in orthopedic treatment of Class II division 1." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10085.
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The treatment of Class II division 1 by jaw upper disorder is a controversial subject in the literature. This study aims to evaluate, through the PAR Index (Peer Assessment Rating), orthopedic treatment of Class II malocclusion division 1 in 15 patients of both sexes who have made growing use of the appliance Thurow modified. This study consisted of a retrospective longitudinal clinical study with no control group. The average age of patients at the start of treatment was 9.3 years for females and 9.4 years for males. The PAR index was obtained from pre and post treatment of each patient. An improvement of 31% or more was considered effective treatment. After descriptive analysis, it was observed that the initial average PAR index of 33 was reduced to 18.5 at the end of treatment, featuring an improved occlusion averaged 43.9%. The treatment was effective in 86.7% of patients, no statistical difference was observed in relation to sex and age at start of treatment (p> 0.05). It was also found that the apparatus provided significant changes in overjet correction (p <0.05). From this study it can be concluded that the orthopedic treatment of Class II division 1 with modified Thurow appliance in growing patients presented a viable alternative, and we observed an improvement of occlusal relationships primarily with respect to overjet and molar relationship towards anteroposterior.O tratamento da Classe II divisÃo 1 por alteraÃÃo maxilar à um assunto controverso na literatura. Este trabalho tem como objetivo avaliar, por meio do Ãndice PAR (Peer Assessment Rating), o tratamento ortopÃdico da mà oclusÃo de Classe II divisÃo 1 em 15 pacientes, de ambos os sexos e em fase de crescimento, que fizeram o uso do aparelho Thurow modificado. Esta pesquisa consistiu de um estudo clÃnico longitudinal retrospectivo, sem grupo controle. A idade mÃdia dos pacientes no inÃcio do tratamento foi de 9,3 anos para o sexo feminino e 9,4 anos para o sexo masculino. O Ãndice PAR foi obtido dos modelos prà e pÃs-tratamento de cada um dos pacientes. Uma melhora de 31% ou mais foi considerada como tratamento efetivo. ApÃs a realizaÃÃo da anÃlise descritiva, observou-se que o Ãndice PAR inicial mÃdio de 33 foi reduzido para 18,5 ao final do tratamento, caracterizando uma melhora da oclusÃo em mÃdia de 43,9%. O tratamento foi efetivo em 86,7% dos pacientes, nÃo sendo observada diferenÃa estatÃstica em relaÃÃo ao sexo e à idade de inÃcio do tratamento (p>0,05). Verificou-se tambÃm que o aparelho proporcionou mudanÃas significativas na correÃÃo do overjet (p<0,05). A partir deste trabalho, pode-se concluir que o tratamento ortopÃdico da Classe II divisÃo 1 com o aparelho Thurow modificado em pacientes em crescimento apresentou-se uma alternativa viÃvel, sendo observada uma melhora das relaÃÃes oclusais, principalmente em relaÃÃo ao overjet e à relaÃÃo molar no sentido anteroposterior.
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Burton, 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.
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Hume, Clifford Robert. "Regulation of HLA class II expression in class II negative mutant B-cell lines /." Access full-text from WCMC, 1989. http://proquest.umi.com/pqdweb?did=745028251&sid=1&Fmt=2&clientId=8424&RQT=309&VName=PQD.
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Daniels, Sheila Meghnot. "Comparison of surgical and non-surgical orthodontic treatment approaches on occlusal and cephalometric outcomes in patients with severe Class II division I malocclusions." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5449.
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This study aimed to examine end-of-treatment outcomes of severe Class II Division I malocclusion patients treated with surgical or non-surgical approaches. This study tests the hypotheses that occlusal outcomes (ABO-OGS) at end of treatment will be similar while cephalometric outcomes will differ between these groups. A total of 60 patients were included: 20 of which underwent surgical correction and 40 of which did not. The end of treatment ABO-OGS and cephalometric outcomes were compared by Mann-Whitney U tests and multivariable linear regression models. Following adjustment for multiple confounders (age, gender, complexity of case, and skeletal patterns), the final deband score (ABO-OGS) was similar for both groups (23.8 for surgical group versus 22.5 for non-surgical group). Those treated surgically had a significantly larger reduction in ANB angle, 3.4 degrees reduction versus 1.5 degrees reduction in the non-surgical group (p=0.002). The surgical group also showed increased maxillary incisor proclination (p=0.001) compared to candidates treated non-surgically. This might be attributed to retroclination of incisors during treatment selection in the non-surgical group – namely, extraction of premolars to mask the discrepancy. Studies such as this are necessary because they begin to give practitioners view of not only the outcomes of a single treatment plan, but a comprehensive approach by providing evidence of the over-arching treatment used for successful treatment in both groups.
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杜熹 and Xi Du. "Skeletal, dental and muscular effects in class II division 1 malocclusion treated by Herbst appliance." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31238439.
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Du, Xi. "Skeletal, dental and muscular effects in class II division 1 malocclusion treated by Herbst appliance /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21129447.
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Fonçatti, Camilla Fiedler. "Long-term stability of Class II division 1 treatment with the MARA combined with fixed appliances." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-19072018-105455/.
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Introduction: Successful treatment of class II Division 1 malocclusion is also implied to the long-term stability of treatment changes and many are the factors that can influence that. Objective: This research aimed to evaluate the long-term stability of the cephalometric changes obtained during Class II malocclusion correction with the MARA (Mandibular Anterior Repositioning Appliance) associated with fixed appliances. Methods: The treatment group comprised 12 patients who were evaluated at three stages: pretreatment (T1), posttreatment (T2) and long-term posttreatment (T3). The mean initial age of the patients was 12.35 years and the mean final age was 15.65 years. The mean age at the long-term posttreatment stage was 22.53 years and the mean long-term posttreatment period was 6.88 years. The control group comprised 12 subjects with normal occlusion and no orthodontic treatment with ages comparable to the treatment group at the posttreatment and long-term posttreatment stages. Intra-treatment group comparison between the three stages was performed with repeated measures analysis of variance (ANOVA), followed by Tukey tests. Intergroup comparison of posttreatment changes and normal growth changes of the treatment group were performed with t tests. Results: reduction of the maxillary protrusion and improvement of the maxillomandibular relationships remained stable during the long-term posttreatment period. Maxillary incisors inclination and overjet presented a tendency to relapse in relation to the control group Conclusions: Despite the different amount of growth potential, the reduction of the maxillary protrusion and maxillomandibular relationship improvement remained stable with no difference from normal occlusion behavior. Palatal inclination of the maxillary incisors and the overjet improvement showed a slight tendency towards relapse when compared to normal occlusion. Therefore, an increase of active retention time could be recommended to prevent that.Introdução: o tratamento bem-sucedido da má oclusão de classe II Divisão 1 está implícito na estabilidade em longo prazo das correções e muitos são os fatores que podem influenciar esta estabilidade. Objetivos: observando que a terapia com o aparelho MARA (Mandibular Anterior Repositioning Appliance) associado ao aparelho ortodôntico fixo mostrou-se eficaz na correção da Classe II, este trabalho estabeleceu como objetivo avaliar cefalometricamente a estabilidade em longo prazo das correções obtidas durante este tratamento. Materiais e métodos: foram analisadas as alterações durante e após o tratamento através das telerradiografias em norma lateral de 12 pacientes (09 meninos e 03 meninas) nas fases: inicial (T1), final (T2) e pós-tratamento (T3), com idade média inicial de 12,35 anos e 15,65 anos ao final do tratamento. A idade media no estágio de pós tratamento em longo prazo foi de 22,53 e o tempo de acompanhamento pós tratamento foi em media 6,88 anos. As alterações foram comparadas a um Grupo Controle com oclusão normal, não tratados ortodonticamente, com idades compatíveis ao grupo experimental nos estágios final e pós tratamento em longo prazo. Os dados obtidos foram analisados através da análise de variância (ANOVA) para medidas repetidas e o teste de comparações múltiplas de Tukey. As alterações ocorridas no período de póstratamento foram comparadas com as alterações do Grupo Controle durante o período correspondente utilizando o teste t independente. Resultados: Observou-se uma redução da protrusão maxilar, assim como, uma melhora das relações maxilomandibulares, as quais, permaneceram estáveis durante o período de póstratamento. A inclinação dos incisivos superiores e o overjet apresentaram tendência à recidiva em relação ao grupo controle. Conclusões: A redução da protrusão maxilar e melhora da relação maxilomandibular mantiveram-se estáveis, sem diferença estatisticamente significante do comportamento na oclusão normal. A retroinclinação dos incisivos superiores e a melhora do overjet mostraram uma ligeira tendência à recidiva quando comparada ao comportamento da oclusão normal. Portanto, um aumento do tempo de retenção ativo pode ser recomendado para evitar essa recidiva.
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Brady, Patrick. "Cephalometric analysis of adolescents with severe Class II Division 1 malocclusions treated surgically and non-surgically." Thesis, University of Iowa, 2016. https://ir.uiowa.edu/etd/3052.
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Introduction: Class II Division 1 malocclusions are characterized by a retrusive mandible and prominent upper incisors. Despite Class II malocclusions being one of the most frequently treated cases in orthodontists' office, there is no uniform consensus in the orthodontic community on the best treatment modality and biomechanical approach to use in treating patients with Class II malocclusions.
Purpose: This paper examines the end-of-treatment outcomes of severe Class II Division I malocclusion patients treated with surgical versus non-surgical approaches.
Study Design: This is a retrospective study of consecutively treated severe Class II Division I patients at the University of Iowa. Initial and deband lateral cephalometric radiographs were compared between 45 non-surgical and 21 surgical patients. All patients that were debanded between the ages of 13 to 19 years were included. Multivariable regression analyses were used to examine differences in outcomes between treatment groups.
Results: Following adjustment for patient level confounders (age, gender, and race), those treated surgically had better end of treatment cephalometric outcomes. Those treated surgically had a more balanced skeletal profile, greater reduction in overjet, and improvement in ANB angle (p
Conclusion: Orthodontic treatment in conjunction with orthognathic surgery is a more ideal treatment for patients with severe Class II Division I malocclusion. When treated surgically, a greater amount of overjet can be reduced while keeping lower incisors in a more stable position in bone.
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McGuinness, N. J. P. "Treatment outcome in Angle's class II division 1 malocclusion treated with fixed appliances in the permanent dentition." Thesis, Queen's University Belfast, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432658.
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Alsibaie, Lina. "Non surgical treatment strategies and outcomes in patients with class II division I malocclusion and severe overjet." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/3243.
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Background: Class II malocclusion is among the most common treated cases in orthodontics, yet there has not been a uniform consensus on the most effective and stable non-surgical treatment approach for class II division 1 malocclusion.
Purpose: The purpose of this study is to assess effectiveness, long term stability, and quality of life following non-surgical orthodontic treatment in patients with Class II Division I malocclusion and severe overjet.
Study Design: This study consists of a retrospective arm, analyzing the treatment approaches and effectiveness of class II division 1 with severe overjet, as well as a prospective arm assessing long-term stability and quality of life. Initial and final results for 30 patients treated non-surgically were analyzed by photos and lateral cephalometric radiographs. A post retention clinical exam was done for final measurements, assessment for practitioner and patient satisfaction, and patient quality of life questionnaires.
Results: Non-surgical treatments for severe class II division 1 patients have shown to be statistically significant in effectively reducing overjet and overbite (P < 0.01) as well as improving the SNB and ANB angles (P<0.01) and angulation of maxillary incisors to SN plane (P < 0.05). Patient satisfaction was averaged at 4.1-4.3 (on a 5-point scale) for treatment, esthetics, and occlusion indicating good results and long-term stability. Quality of life assessments were also high based on the OHIP and CPQ.
Conclusion: Non-surgical treatment to correct class II can significantly reduce overjet and overbite, SNB and ANB angles, as well as the angulation of maxillary incisors to SN plane. These treatment approaches have shown to be reliable in retention and stability of occlusion, as well as high results of patient satisfaction.
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Hechler, Paul Joseph. "Long term patient and orthodontist satisfaction with non surgical correction of severe class II division 1 malocclusions." Thesis, University of Iowa, 2019. https://ir.uiowa.edu/etd/6760.
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Background: The correction of Class II malocclusions is one of the most common treatments performed in the United States. Despite Class II malocclusions being one the most commonly presented problems for orthodontists, there is no consensus of which non-surgical treatment modality best impacts a patient’s quality of life long term.
Purpose: This study examines the different non-surgical treatment approaches for patients with severe Class II division 1 and the impact of treatment outcomes on patient satisfaction and quality of life long term.
Study Design: This study retrospectively analyzed the different treatment approaches and outcomes of class II division 1 with severe overjet, while prospectively assessing patient satisfaction and quality of life long term. Initial and final cephalometric and clinical variables for 83 patients (38 at Harvard School of Dental Medicine, 30 at the University of Iowa, and 15 in private practice in Iowa) treated non-surgically were recorded and analyzed. A retention clinical exam, at least 6 months post-debond, was done for final measurements, assessment of practitioner and patient satisfaction, and patient quality of life questionnaires.
Results: Non-surgical treatment of severe Class II division 1 malocclusions yielded 5.54 mm overjet reduction and 0.51 mm of relapse in retention on average. Patients with more overjet at their long term retention check demonstrated significantly poorer satisfaction scores with the appearance of their bite (p<0.001), the appearance of their face (p<0.001), and with their overall orthodontic treatment (p<0.001). Extraction treatment was associated with significantly lower patient satisfaction scores of overall orthodontic treatment (p=0.023) and appearance of bite (p=0.018) but not facial appearance. Patients treated with extractions also showed higher QOL scores on the OHIP-14 (p=0.022) and CPQ (p=0.002) surveys, indicating that extraction therapy of severe Class II division 1 patients led to a significantly poorer quality of life.
Conclusion: Non-surgical treatment of severe Class II division 1 malocclusions can yield excellent results and stability long term. Overjet can be dramatically reduced with non-surgical treatment but there is a tendency for overjet to relapse in retention. While treatment outcomes yielded high results of patient satisfaction, patients with more overjet in retention displayed significantly less satisfaction of the appearance of their bite, appearance of their face, and with their overall orthodontic treatment. Extraction treatment was associated with significantly lower patient satisfaction scores of overall orthodontic treatment and appearance of bite but not facial appearance. Patients treated with extractions showed poorer quality of life scores in retention compared to those treated nonextraction.
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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.
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Thesis (M.S.)--University of Florida, 2004.Typescript. Title from title page of source document. Document formatted into pages; contains 31 pages. Includes Vita. Includes bibliographical references.
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Fergus, Kelly-Gwynne Mason. "Esthetic evaluation of edgewise orthodontic treatment in matched class II, division 1 subjects, with and without a MARA." View the abstract Download the full-text PDF version, 2008. http://etd.utmem.edu/ABSTRACTS/2008-022-Fergus-index.html.
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Thesis (M.S. )--University of Tennessee Health Science Center, 2008.Title from title page screen (viewed on July 30, 2008). Research advisor: Edward F. Harris, Ph.D. Document formatted into pages (xi, 174 p. : ill.). Vita. Abstract. Includes bibliographical references (p. 103-112).
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Semrén, Philip. "Dissipative Perturbations on LRS Class II Cosmologies Using the 1+1+2 Covariant Split of Spacetime." Thesis, Umeå universitet, Institutionen för fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176037.
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By including dissipative fluxes in the description, this thesis extends previous results regarding first order perturbations on homogeneous and hypersurface orthogonal locally rotationally symmetric (LRS) class II cosmologies using the 1 + 1 + 2 covariant split of spacetime. Whereas previous works consider perturbations of perfect fluid type, perturbations pertaining to heat flux and fluid viscosity are here studied with the aim to ascertain their effect on the evolution of the fluid vorticity. The studied perturbations include scalar, vector, and tensor modes, and are harmonically decomposed to yield a system of ordinary differential equations. These equations, originating from the Bianchi identities, the Ricci identities for certain preferred vector fields, and the thermodynamic Eckart theory, then decouple into two independent systems. These separately closed systems, with four and eight remaining variables respectively, describe the evolution of perturbations pertaining to the Weyl tensor and the fluid shear, vorticity, heat flow, energy density, and number density. From the final system of equations it is seen that the inclusion of heat flux and fluid viscosity has the possibility to yield mechanisms for generating vorticity, even if this vorticity vanishes initially. This is in contrast to the case of barotropic perfect fluids, for which it can be shown that vorticity perturbations cannot be generated. The validity of the results presented here can be questioned, as the Eckart theory, which violates causality, is employed to describe the detailed thermodynamic properties of the fluid. However, on time scales much larger than the relaxation times of the fluid, it should still provide a decent description of the dissipative phenomena, provided that certain couplings between the dissipative fluxes can be neglected.
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Laparidis, Con. "A retrospective cephalometric study of the effect of the Fränkel appliance, the ClarkTwin Block and the activator on class II division /." Title page, contents and summary only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phl299.pdf.
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Brandão, Roberto Carlos Bodart [UNESP]. "Avaliação cefalométrica do comportamento da mandíbula na interceptação da má oclusão classe II divisão 1 de Angle, com aparelho bionator." Universidade Estadual Paulista (UNESP), 2000. http://hdl.handle.net/11449/104498.
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brandao_rcb_dr_ararafo.pdf: 991815 bytes, checksum: 99a75cf5e9f65a7b54986c0a30ee9b72 (MD5)Foi avaliado o efeito do aparelho Bionator no tratamento da má oclusão classe II divisão 1, dando-se especial ênfase às alterações mandibulares. Utilizou-se 124 telerradiografias de 62 indivíduos portadores de má oclusão classe II divisão 1, sendo 27 do sexo masculino e 35 do sexo feminino, divididos em dois grupos de 31. Um grupo foi tratado com aparelho Bionator, obtendo-se a correção da relação molar e da sobressaliência em 1,3 anos, em média, com idade inicial de 9,17 anos. O outro grupo, utilizado como controle, não recebeu tratamento, foi observado por 1,5 anos em média, com idade inicial de 8,68 anos. Para cada indivíduo havia uma telerradiografia obtida no início e outra no fim da observação. As variáveis cefalométricas foram mensuradas e submetidas ao tratamento estatístico. Os resultados demonstrarama que a correção da má oclusão classe II divisão 1 deveu-se principalmente as alterações dentárias promovidas pel Bionator, representando 71,31% da correção molar e 79,64% da correção da sobressaliência. Houve uma significativa diminuição do ANB pelo Bionator, mas a desejável ação de projeção mandibular não foi estatisticamente significante. Apesar de ter havido significativo aumento do comprimento mandibular, este foi contraposto pela rotação para posterior da mandíbula. Houve também restrição do crescimento maxilar horizontal, e estabilidade ântero-posterior da cavidade glenóide. Parece não haver indicação para o uso sistemático do aparelho Bionator, devendo sua utilização ser restrita a casos de maior retrusão mandibular, planejando-se a reversão dos efeitos de rotação mandibular, para se utilizar o crescimento extra condilar no aumento da protusão da mandíbula.
The effect of Bionator appliance in treatment of the malocclusion Class II division 1 was evaluated, with special emphasis to alterations in mandible. Lateral cephalograms (124) of 62 individuals with Class II division 1 malocclusion were available, being 27 male and 35 female, divided in two groups of 31. One group was treated with Bionator, with the correction of the relationship molar and overjet obtained in 1,3 years on average, with initial age 9,17 years old. The other group was used as control, didn't receive treatment, it was observed by 1,5 years on average, with initial age 8,68 years old. For each individual, lateral cephalograms were obtained in the beginning and at the end of the observation. The cephalometric variables were measured and submitted to the statistical treatment. The results demonstrated that the correction of the class II division 1 malocclusion was due, mainly, to dental alterations promoted by Bionator, representing 71.31% of the molar correction 79,64% of the overjet correction. There was a significant decrease of ANB angle with Bionator, but the desirable action of increase in mandibular protusion was no stastistically significant. In spite of having significant increase of the mandible length, this was opposed by the back rotation of the jaw. There was restriction of the horizontal maxillary growth, and antero-posterior stability of the glenoid fossa. It seems there is no indication for the systematic use of the Bionator, having its use to be restricted to cases of larger mandibular retrusion, being planned the reversion of the mandibular rotation, to use the extra condilar growth to the increase of the mandibular protusion.
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Chintakanon, Kanoknart. "A prospective study of twin block appliance therapy in children with Class II division 1 malocclusions assessed by MRI, 3D-Cephalometry and muscle testing /." Title page, contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phc539.pdf.
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Arruda, Karine Evangelista Martins. "Avaliação de deiscência e fenestração por meio de tomografia computadorizada volumétrica em pacientes com maloclusão de Classe I e Classe II Divisão 1." Universidade Federal de Goiás, 2009. http://repositorio.bc.ufg.br/tede/handle/tede/4149.
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Dissertação - Karine Evangelista Martins Arruda - 2009.pdf: 8715038 bytes, checksum: d21da1c098fc0bfd5e300a4c0e32fdb8 (MD5)
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The effects of orthodontic treatment on periodontal structures have been studied in literature, especially regarding the integrity of alveolar bone and gingival health of the teeth to be displaced. The aim of this study was to evaluate the presence of alveolar defects (dehiscence and fenestrations) in patients with Class I and Class II division 1 malocclusions and in different facial types using cone beam computed tomography (CBCT). The sample comprised 159 tomography exams of patients with no previous orthodontic treatment, giving a total of 4319 teeth. The presence or absence of dehiscence and fenestration in the buccal and lingual surfaces was checked in axial and crosssectional views. The results showed that 155 patients (96.9%) presented some type of alveolar defect. The Class I malocclusion patients presented higher prevalence of dehiscences (35%) than those with Class II division 1 malocclusion. There was no statistically significant difference between the facial types. Lower incisors, lower canines and lower first premolars were respectively the teeth with more occurrences of alveolar defects. This study concluded that CBCT is indicated for patients who need extensive tooth movement and have unfavorable gingival biotype.
Os efeitos do tratamento ortodôntico nas estruturas periodontais tem sido objeto de estudo da literatura, principalmente quanto à integridade óssea e saúde gengival dos dentes a serem deslocados. O objetivo deste estudo foi avaliar a presença de defeitos alveolares (deiscências e fenestrações) em pacientes com maloclusão de Classe I e Classe II divisão 1 e em diferentes tipos faciais por meio de tomografia computadorizada volumétrica. A amostra foi composta de 159 exames tomográficos de pacientes indicados para tratamento ortodôntico, totalizando 4319 dentes avaliados. A presença ou ausência de deiscência e fenestração nas faces vestibular e lingual/palatina era observada em tomogramas axiais e transversais. Os resultados demonstraram que 155 pacientes (96,9%) apresentaram algum tipo de defeito alveolar. Os pacientes com maloclusão de Classe I apresentaram maior prevalência das deiscências (35%) em relação aos pacientes com maloclusão de Classe II divisão 1. Entre os tipos faciais não houve diferença estatisticamente significante. Incisivos inferiores, caninos inferiores e primeiros pré-molares inferiores foram respectivamente os dentes com maior ocorrência dos defeitos. Este estudo concluiu que a tomografia computadorizada volumétrica está indicada nos casos de pacientes que necessitem de movimento ortodôntico mais extenso e possuam biótipo gengival desfavorável.
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Brandão, Roberto Carlos Bodart. "Avaliação cefalométrica do comportamento da mandíbula na interceptação da má oclusão classe II divisão 1 de Angle, com aparelho bionator /." Araraquara : [s.n.], 2000. http://hdl.handle.net/11449/104498.
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Orientador: Ary dos Santos-PintoBanca: José Nelson Mucha
Banca: Weber José da Silva Ursi
Banca: Luiz Gonzaga Gandini Júnior
Banca: Maurício Tatsuei Sakima
Resumo: Foi avaliado o efeito do aparelho Bionator no tratamento da má oclusão classe II divisão 1, dando-se especial ênfase às alterações mandibulares. Utilizou-se 124 telerradiografias de 62 indivíduos portadores de má oclusão classe II divisão 1, sendo 27 do sexo masculino e 35 do sexo feminino, divididos em dois grupos de 31. Um grupo foi tratado com aparelho Bionator, obtendo-se a correção da relação molar e da sobressaliência em 1,3 anos, em média, com idade inicial de 9,17 anos. O outro grupo, utilizado como controle, não recebeu tratamento, foi observado por 1,5 anos em média, com idade inicial de 8,68 anos. Para cada indivíduo havia uma telerradiografia obtida no início e outra no fim da observação. As variáveis cefalométricas foram mensuradas e submetidas ao tratamento estatístico. Os resultados demonstrarama que a correção da má oclusão classe II divisão 1 deveu-se principalmente as alterações dentárias promovidas pel Bionator, representando 71,31% da correção molar e 79,64% da correção da sobressaliência. Houve uma significativa diminuição do ANB pelo Bionator, mas a desejável ação de projeção mandibular não foi estatisticamente significante. Apesar de ter havido significativo aumento do comprimento mandibular, este foi contraposto pela rotação para posterior da mandíbula. Houve também restrição do crescimento maxilar horizontal, e estabilidade ântero-posterior da cavidade glenóide. Parece não haver indicação para o uso sistemático do aparelho Bionator, devendo sua utilização ser restrita a casos de maior retrusão mandibular, planejando-se a reversão dos efeitos de rotação mandibular, para se utilizar o crescimento extra condilar no aumento da protusão da mandíbula.
Abstract: The effect of Bionator appliance in treatment of the malocclusion Class II division 1 was evaluated, with special emphasis to alterations in mandible. Lateral cephalograms (124) of 62 individuals with Class II division 1 malocclusion were available, being 27 male and 35 female, divided in two groups of 31. One group was treated with Bionator, with the correction of the relationship molar and overjet obtained in 1,3 years on average, with initial age 9,17 years old. The other group was used as control, didn't receive treatment, it was observed by 1,5 years on average, with initial age 8,68 years old. For each individual, lateral cephalograms were obtained in the beginning and at the end of the observation. The cephalometric variables were measured and submitted to the statistical treatment. The results demonstrated that the correction of the class II division 1 malocclusion was due, mainly, to dental alterations promoted by Bionator, representing 71.31% of the molar correction 79,64% of the overjet correction. There was a significant decrease of ANB angle with Bionator, but the desirable action of increase in mandibular protusion was no stastistically significant. In spite of having significant increase of the mandible length, this was opposed by the back rotation of the jaw. There was restriction of the horizontal maxillary growth, and antero-posterior stability of the glenoid fossa. It seems there is no indication for the systematic use of the Bionator, having its use to be restricted to cases of larger mandibular retrusion, being planned the reversion of the mandibular rotation, to use the extra condilar growth to the increase of the mandibular protusion.
Doutor
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Thiruvenkatachari, Badri. "A comparision of the effectiveness of the twin bloack and the dynamax appliances for the treatment of class 2 division 1 malocclusion patients : A randomised controlled trial." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499825.
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Melo, Ana Cláudia Moreira. "Mudanças no perfil facial de crianças com má oclusão classe II, divisão 1 decorrentes do crescimento normal e induzidas pelo bionator de Balters /." Araraquara : [s.n.], 2003. http://hdl.handle.net/11449/104527.
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Orientador: Ary dos Santos-PintoBanca: Terumi Okada Ozawa
Banca: Roberto Hideo Shimizu
Banca: Lídia Parsekian Martins
Banca: Luiz Gonzaga Gandini Jr.
Resumo: A deficiência de dados na literatura nos levou a avaliar o efeito do tratamento com o aparelho bionator de Balters no perfil facial de crianças com má oclusão Classe II, divisão 1 de Angle, excluindo as mudanças que ocorreriam com o crescimento natural. A amostra consistiu de telerradiografias de pacientes leucodermas com idades entre 6 anos e 11 meses e 11 anos e 2 meses, divididos aleatoriamente em dois grupos. Um grupo controle, composto por 11 pacientes acompanhados sem tratamento por 1 ano, e um grupo experimental, composto por 12 pacientes acompanhados durante 1 ano de tratamento, sendo que oito desses pacientes foram avaliados no 2º ano de tratamento. A seleção da amostra teve como critérios de inclusão a presença dos incisivos centrais e laterais permanentes erupcionados ou em erupção, sobremordida e sobressaliência aumentadas e ausência de apinhamento dentário e alteração transversal dos arcos. A análise cefalométrica constou de medidas tradicionais angulares e lineares, esqueléticas, dentárias e de tecidos moles, além da verificação do deslocamento individual dos pontos do perfil facial em coordenadas x e y. A aplicação do teste de Levene mostrou evidências estatísticas de semelhança inicial entre os grupos. Procedeu-se então a análise estatística que mostrou alterações significantes (p<0,05) nas variáveis indicativas de convexidade esquelética, espessura dos lábios e comprimento do lábio inferior, além de aumento da altura facial esquelética e tegumentar. Por outro lado, não foi significante a alteração na convexidade tegumentar e comprimento do lábio superior nos pacientes tratados. Pode ser concluído com base nos resultados encontrados que o uso do bionator teve efeito favorável na alteração do perfil facial, principalmente na região de lábios e na altura facial.
Abstract: Literature deficiency has led us to evaluate the changes on soft-tissue profile of Class II division 1 children induced by the use of Balters bionator appliance, excluding the changes that would occur with normal growth. The sample consisted of lateral radiographies of leucoderm children from 6 years and 11 months to 11 years and 2 months, randomly divided into two groups. The control group was formed by 11 patients followed with no treatment during one year, and the experimental one was composed by 12 children, accompanied for 1 year, but eight of these patients were also evaluated 2 years after the treatment onset. The inclusion criteria were the central and lateral permanent incisors erupted or into eruption, increased overjet and overbite, and no crowding or transverse problems in the dental arches. The cephalometric analysis consisted of angular and linear skeletal, dental and soft-tissue traditional measurements as well as the verification of the individual dislocation of the soft-tissue points in x and y coordinates. Levene's test application showed statistical evidence of similarity between the groups on the beginning of the research. The statistical analysis showed significant alterations (p<0,05) of either skeletal convexity, width of upper and lower lips, and lower lip length, or skeletal and soft-tissue vertical height. On the other hand, there was no significant change on soft-tissue convexity and upper lip length in the treated patients. It can be concluded that the use of bionator had a favorable effect on soft-tissue profile, especially on lips and vertical facial height.
Doutor
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Lee, Paul Chong Chan. "A QUALITATIVE AND QUANTITATIVE ANALYSIS OF SOFT TISSUE CHANGE EVALUATION BY ORTHODONTISTS IN CLASS II NON EXTRACTION ORTHODONTIC TREATMENT USING THE 3dMD SYSTEM." Master's thesis, Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/217032.
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Oral BiologyM.S.
With the advent of cephalometrics in the 1930s, numerous studies have focused on the profile of a face to achieve a more esthetic orthodontic treatment outcome. With such heavy emphasis on facial esthetics, a shift in focus from the profile view to the oblique view has become necessary as the smile in the oblique view is what the general public evaluates. The purpose of this pilot study was to determine whether the current tools for diagnosis and treatment evaluation are sufficient. Currently, 2-dimensional composite photographs are utilized in evaluating the soft tissue. At Temple University, 3-dimensional images, which show all sides of the patient's face, are used adjunctively to 2-dimensional composite photographs. In this study, faculty members at the Temple University Department of Orthodontics were asked to complete surveys after viewing two different image modalities, 2-dimensional images and a 3-dimensional video of the same patient. They were asked to fill out the soft tissue goals for specific facial landmarks. Patient photos were in the smiling view as current literature lacks studies on this view. Faculty members' responses from analyzing the 2-dimensional images and 3-dimensional video for each patient were compared to determine which areas had frequent discrepancies from using two different image modalities. During the survey, a voice recorder captured any comments regarding the images. The ultimate goal of this qualitative pilot study was to identify when 3-dimensional imaging is necessary in treatment planning and evaluation, with an added hope to further advance research in 3-dimensional imaging and its vast possibilities to advance the field of orthodontics. Based on the data collected, the following conclusions were made: 1. The qualitative data highlighted that 3-dimensional imaging would be necessary in cases with skeletal deformities. 2. In the oblique view, 3-dimensional imaging is superior than 2-dimensional imaging by showing more accurate shadow, contour, and depth of the soft tissue. 3. Further improvement is necessary to create a virtual patient with treatment simulation abilities. 4. The comfort level among orthodontists of 2-dimensional imaging was higher than 3-dimensional imaging. With more widespread use of 3-dimensional imaging, more orthodontists may gradually reach a higher comfort level in using this relatively new technology. 5. Faculty members expressed high willingness to use 3-dimensional imaging if improvement in new technology could allow for more manipulation and accurate soft tissue prediction. 6. 3-dimensional imaging is superior in its efficiency, quick capture time, and lack of need for multiple images. Implementation of 3-dimensional imaging could streamline the records process and help with practice efficiency without compromising the image quality. 7. Both patients and orthodontists may benefit from using 3-dimensional imaging. Patients can see an accurate representation of themselves and possibly view their own treatment simulation upon further improvement in current technology. Orthodontists would benefit with much more accurate images that may serve as the virtual patient. 8. Besides the exorbitantly high cost, faculty members thought that more advances were needed and the current benefit was not great enough to justify the investment. The results were consistent with other studies that used the oblique view in that the 2-dimensional oblique view lacks depth and does not provide adequate information. With further improvement in current 3-dimensional imaging, this technology can benefit orthodontists in visualizing their patients. In addition, patients can benefit by hopefully seeing a live and accurate simulation of themselves instantly as a virtual patient. With these benefits of 3-dimensional imaging, it may one day be the new standard in patient records in the field of orthodontics.
Temple University--Theses
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Branco, Nuria Cabral Castello. "Alterações no perfil tegumentar em pacientes com má oclusão de Classe II tratados com aparelhos funcionais fixos e extrações de 2 pré-molares." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-08012013-104930/.
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O objetivo deste trabalho foi comparar as alterações e as condições póstratamento do perfil tegumentar de pacientes com má oclusão de Classe II divisão 1 tratados sem extrações e com extrações de 2 pré-molares superiores. A amostra foi constituída por 96 telerradiografias em norma lateral de 48 pacientes, os quais foram divididos em 2 grupos. O grupo 1 foi formado por 23 pacientes tratados com aparelhos funcionais fixos associados ao aparelho fixo, com idade média inicial e final de 12,71 e 15,16 anos, respectivamente, tempo médio de tratamento de 2,44 anos e sobressaliência inicial de 6,83 mm. O Grupo 2 foi composto por 25 pacientes, tratados com extrações de dois pré-molares superiores, com idade média inicial e final de 13,05 e 15,74 anos, respectivamente, tempo médio de tratamento de 2,69 anos e sobressaliência inicial de 7,01 mm. A comparação intergrupos das alterações do tratamento foi realizada através do teste t. Os resultados demonstraram que pacientes com má oclusão de Classe II divisão 1 tratados com aparelhos funcionais fixos associados ao aparelho fixo e pacientes tratados com extrações de 2 prémolares superiores apresentam semelhanças nas alterações e no estágio póstratamento no perfil tegumentar.The aim of this study was to compare soft-tissue changes and posttreatment status after nonextraction and maxillary premolar extraction treatment in patients with Class II division 1 malocclusion. The sample consisted of 96 lateral cephalograms of 48 patients, divided into 2 groups. Group 1 consisted of 23 patients treated with fixed functional appliance associated with fixed appliance, with initial and final mean ages of 12.71 and 15.16 years, respectively, mean treatment time of 2.44 years and initial mean overjet of 6.83 mm. Group 2 comprised 25 patients treated with extraction of 2 maxillary premolars with initial and final mean ages of 13.05 and 15.74 years, respectively, mean treatment time of 2.67 years and initial mean overjet of 7.01 mm. Independent t tests were used to compare treatment changes between groups. The results showed that patients with Class II malocclusion treated with fixed functional appliances associated with fixed appliance and 2 maxillary premolar extraction provides similar soft-tissue changes and posttreatment status.
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Paulin, Ricardo Fabris [UNESP]. "Padrão rotacional das estruturas dentofaciais natural e induzido pelo tratamento com aparelho de Thurow modificado: estudo cefalométrico com implantes metálicos." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/95813.
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paulin_rf_me_arafo.pdf: 1118525 bytes, checksum: e7853b055155b52cc0f52048b8fca101 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este estudo prospectivo foi realizado com o objetivo de avaliar o padrão rotacional das estruturas dentofaciais natural e induzido pelo tratamento com o extrabucal de Thurow modificado. Os pacientes tratados tinham entre 7 e 10 anos de idade, leucodermas, portadores de mordida aberta anterior, má oclusão de Classe II divisão 1 com tendência a crescimento vertical e apresentavam implantes metálicos na maxila e mandíbula, conforme proposto por Bjork15 (1955), sendo utilizado para comparação um grupo de pacientes com má oclusão Classe II divisão 1 de Angle, sem tratamento e em igual número, do Burlington Growth Center, Departamento de Ortodontia da Faculdade de Odontologia, Universidade de Toronto, Canadá. Foram realizadas radiografias cefalométricas em norma lateral iniciais e após 1 ano de tratamento no grupo experimental e no grupo controle as radiografias foram tomadas aos 6, 9 e 12 anos de idade. Os traçados foram escaneados e dezenove pontos cefalométricos marcados no programa Radiocef Studioâ, aonde foram traçadas linhas, planos e realizadas as medidas cefalométricas tradicionais e as utilizando os pontos fiduciais. A análise dos dados obtidos mostrou que o uso do aparelho extrabucal de Thurow modificado resultou em acentuada rotação horária do plano palatino e rotação anti-horária da linha de implante maxilar, enquanto que o efeito do crescimento natural havia sido de leve rotação horária da linha de implante e estabilidade do plano palatino; o padrão de rotação mandibular decorrente do crescimento natural mostrou tendência de rotação anti-horária e no grupo experimental houve aumento desse padrão; e em relação ao plano oclusal, houve aumento da inclinação do plano oclusal superior e diminuição na inclinação do plano oclusal inferior. Pode ser concluído que o uso do aparelho de Thurow modificado levou à correção... .
This prospective study aimed to evaluate the natural rotational pattern of the dentofacial structures and the one induced by the treatment with the modified Thurow appliance. The treated patients had from 7 to 10 years old, were leucoderm and presented an anterior openbite and a Class II division 1 malocclusion with a vertical growth pattern. In all of the patients there were metallic implants inserted in the maxilla and mandible, as proposed by Björk15 (1955). An equivalent control group of Class II division 1 patients with no treatment was used and collected at the Burlington Growth Center, Orthodontic Department of the Dental School, University of Toronto, Canada. Lateral cephalometric radiographs at the onset and after an one year treatment were taken for the experimental group, and at the ages of 6, 9 and 12 years for the control group. The tracings were scanned, 19 cephalometric points, being 6 fiducial ones, were identified by the use of Radiocef Studio ® software, lines and planes were traced, and cephalometric measurements were performed. The data obtained showed that the use of the modified Thurow appliance resulted into great clockwise rotation of the palatal plane and counterclockwise rotation of the maxillary implant line, while the natural growth effect was of slightly clockwise rotation of the implant line and stabilization of the palatal plane; the mandibular rotational pattern showed a tendency of counterclockwise rotation in the non treated patients and in the experimental group there was an increase in this pattern, and in relation to the oclusal plane, there was an increase in the tipping of the upper oclusal plane and decrease of the lower oclusal plane. It can be concluded that the use of the modified Thurow appliance resulted into correction of the Class II open bite malocclusion by a clockwise rotation of the palatal plane, counterclockwise... (Complete abstract, click electronic address below).
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Vigorito, Fábio de Abreu. "Estudo longitudinal comparativo cefalométrico das mudanças dento-esqueléticas observadas no tratamento e pós-tratamento (Herbst e aparelho ortodôntico fixo pré-ajustado) de adolescentes com má oclusão de Classe II, divisão 1ª e retrognati." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/23/23151/tde-13092012-113517/.
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O Objetivo neste estudo prospectivo foi avaliar as mudanças dento-esqueléticas decorrentes do tratamento da má oclusão de Classe II e retrognatismo mandibular, realizado em duas fases de tratamento (ortopédica com aparelho de Herbst e ortodôntica com aparelho fixo pré-ajustado). As telerradiografias em norma lateral, de 17 adolescentes brasileiros consecutivos, foram obtidas no início (T1), final da FASE ORTOPÉDICA (T2), primeiros 13 meses da FASE ORTODÔNTICA (T3) e término da FASE ORTODÔNTICA (T4). As diferenças entre as variáveis cefalométricas (análise de Pancherz) foram analisadas estatisticamente. Os resultados mostraram que de T1 a T4, do total da projeção para anterior da maxila, 42% aconteceram de T1 a T2, 40,3% de T2 a T3 e 17,7% de T3 a T4. 48,2% do crescimento mandibular expressaram-se de T1 a T2 e 51,8% de T2 a T4, no entanto com desaceleração do crescimento de T2 a T3, para logo retomar um crescimento significativo, expressando os 36,7% até T4. A relação molar de classe II e o aumento da sobressaliência que apresentavam os pacientes no início do tratamento foram corrigidos idealmente. Em T4, todos exibiam oclusão normal estável, com boa relação molar e sobressaliência adequada, atingindo os objetivos do tratamento. O plano oclusal que de T1 a T2 sofreu rotação horária, de T2 a T3 retornou às características iniciais, que se mantiveram estáveis até T4. A inclinação do plano mandibular, que descreve o tipo facial, não sofreu alterações em nenhum tempo de observação. Com base nestes resultados pode-se concluir que as mudanças caracterizaram diferencialmente as duas fases de tratamento, sendo que na fase I houve um maior incremento do crescimento mandibular e mudanças dentárias que sobrecorrigiram a má oclusão. A recidiva parcial das mudanças dentárias observada na fase II, não comprometeu as metas ideais do tratamento. O tipo facial foi preservado.The aim of this prospective study was to assess the dento-skeletal changes in the treatment of Angle Class II, division 1 malocclusion with mandibular retrognathism, realized in two phases (Phase I: Herbst appliance, Phase II: pre-adjusted fixed appliance). Lateral cephalograms of 17 consecutively adolescents were taken at the beginning (T1), at the end of the ORTHOPEDIC FASE (T2), first thirteen months of the ORTHODONTIC FASE (T3) and at end of the ORTHODONTIC FASE (T4). Differences among the cephalometric variables (Pancherz analysis) were statistically analyzed. The results exhibited that from T1 to T4 from the overall maxillary forward growth, 42% happened from T1 to T2, 40,3% from T2 to T3 and 17,7% from T3 to T4. From the overall mandibular forward movement, 48,2% happened from T1 to T2 and 51,8% from T2 to T4, meanwhile with growth slowdown from T2 to T3. The molar Class II relation and the excessive overjet were ideally corrected. At T4, all patients showed stable normal occlusion reaching the objectives of the treatment. The oclusal plane, that from T1 to T2 rotated clock-wise, from T2 to T3 returned to the initial position and remain stable until T4. Mandibular plane inclination, that caracterizes facial type, did not change at any time during the treatment. Based on these results it can be concluded that the changes characterized differently each phase of the treatment: during Phase I there were larger increase of mandibular growth and dental changes that overcorrected the malocclusion. The partial relapse observed in Phase II of treatment did not jeopardize the ideal goals of the treatment. The facial type was preserved.
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Vigorito, Fábio de Abreu. "Estudo comparativo cefalométrico das mudanças dento-esqueléticas observadas nas duas fases do tratamento (Herbst e aparelho ortodôntico fixo pré-ajustado) de adolescentes com má oclusão de Classe II, divisão 1a e retrognatismo mandibular." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/23/23133/tde-17052007-153020/.
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Neste estudo prospectivo foram avaliadas as mudanças dento-esqueléticas decorrentes do tratamento da má oclusão de Classe II, divisão 1ª de Angle e retrognatismo mandibular, realizado em duas fases de 12 meses (fase I com aparelho de Herbst e fase II com aparelho ortodôntico fixo pré-ajustado). As telerradiografias em norma lateral, de 20 adolescentes consecutivos, obtidas em três tempos (T1: início, T2: após a fase I de tratamento realizado com aparelho de Herbst e T3: 12 meses pós-Herbst), foram traçadas manualmente, segundo proposto por Pancherz, e analisadas estatisticamente. Os resultados mostram que de T1 a T2 tanto a maxila quanto à mandíbula projetaram-se para anterior; porém com maiores incrementos na mandíbula, permitindo um ajuste esquelético sagital; os incisivos superiores retroinclinaram e os inferiores vestibularizaram; os molares superiores distalizaram e os inferiores mesializaram e a sobressaliência diminuiu. De T2 a T3, a maxila projetou-se para anterior e a mandíbula apresentou um incremento menor; os incisivos superiores não sofreram mudanças de inclinação e os inferiores lingualizaram; os molares superiores e os inferiores mesializaram e a sobressaliência sofreu um pequeno aumento. Comparando T1 a T3 observou-se correção da má oclusão, com melhora das relações dentárias e esqueléticas. Com base nestes resultados pode-se concluir que as mudanças caracterizaram diferencialmente as duas fases de tratamento, sendo que na fase I houve um maior incremento do crescimento mandibular e mudanças dentárias que sobrecorrigiram a má oclusão. A recidiva parcial das mudanças observada na fase II, não comprometeu as metas ideais do tratamento. O tipo facial foi preservado.This prospective study assessed the dento-skeletal changes of two-phases treatment of Angle Class II, division 1 malocclusion with mandibular retrognathism, realized in two phases of 12 months each (Phase I: Herbst appliance, Phase II: pre-adjusted fixed appliance). The cephalo-lateral radiographs, of 20 consecutively adolescents taken at three different times (T1: outset of treatment, T2: after the Phase I of treatment with Herbst appliance and T3: twelve months post-Herbst treatment), were measured manually according to Pancherz?s method and evaluated statistically. The results exhibited that from T1 to T2 both maxilla and mandible grew forward, although with major increments in the mandible, allowing a sagittal skeletal adjustment. The upper incisors retroclined and the lower incisors proclined; the upper molars moved distally and the lower molars moved mesially and the overjet decreased. The T2-T3 outcomes revealed forward movement of the maxilla and mild mandibular increases. The upper incisors? inclination did not change and the lower incisors retroclined, the upper and lower molars moved mesially and the overjet had a small increase. The T1-T3 results showed correction of the malocclusion with improvement of the dental and skeletal relationship. Based on these results it can be concluded that the changes characterized differently each phase of the treatment: during Phase I there were larger increase of mandibular growth and dental changes that overcorrected the malocclusion. The partial relapse observed in Phase II of treatment did not jeopardize the ideal goals of the treatment. The facial type was preserved.
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Melo, Ana Cláudia Moreira [UNESP]. "Mudanças no perfil facial de crianças com má oclusão classe II, divisão 1 decorrentes do crescimento normal e induzidas pelo bionator de Balters." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/104527.
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melo_acm_dr_arafo.pdf: 963455 bytes, checksum: 63082d3d54677a9308f74993608f95fa (MD5)A deficiência de dados na literatura nos levou a avaliar o efeito do tratamento com o aparelho bionator de Balters no perfil facial de crianças com má oclusão Classe II, divisão 1 de Angle, excluindo as mudanças que ocorreriam com o crescimento natural. A amostra consistiu de telerradiografias de pacientes leucodermas com idades entre 6 anos e 11 meses e 11 anos e 2 meses, divididos aleatoriamente em dois grupos. Um grupo controle, composto por 11 pacientes acompanhados sem tratamento por 1 ano, e um grupo experimental, composto por 12 pacientes acompanhados durante 1 ano de tratamento, sendo que oito desses pacientes foram avaliados no 2º ano de tratamento. A seleção da amostra teve como critérios de inclusão a presença dos incisivos centrais e laterais permanentes erupcionados ou em erupção, sobremordida e sobressaliência aumentadas e ausência de apinhamento dentário e alteração transversal dos arcos. A análise cefalométrica constou de medidas tradicionais angulares e lineares, esqueléticas, dentárias e de tecidos moles, além da verificação do deslocamento individual dos pontos do perfil facial em coordenadas x e y. A aplicação do teste de Levene mostrou evidências estatísticas de semelhança inicial entre os grupos. Procedeu-se então a análise estatística que mostrou alterações significantes (p<0,05) nas variáveis indicativas de convexidade esquelética, espessura dos lábios e comprimento do lábio inferior, além de aumento da altura facial esquelética e tegumentar. Por outro lado, não foi significante a alteração na convexidade tegumentar e comprimento do lábio superior nos pacientes tratados. Pode ser concluído com base nos resultados encontrados que o uso do bionator teve efeito favorável na alteração do perfil facial, principalmente na região de lábios e na altura facial.
Literature deficiency has led us to evaluate the changes on soft-tissue profile of Class II division 1 children induced by the use of Balters bionator appliance, excluding the changes that would occur with normal growth. The sample consisted of lateral radiographies of leucoderm children from 6 years and 11 months to 11 years and 2 months, randomly divided into two groups. The control group was formed by 11 patients followed with no treatment during one year, and the experimental one was composed by 12 children, accompanied for 1 year, but eight of these patients were also evaluated 2 years after the treatment onset. The inclusion criteria were the central and lateral permanent incisors erupted or into eruption, increased overjet and overbite, and no crowding or transverse problems in the dental arches. The cephalometric analysis consisted of angular and linear skeletal, dental and soft-tissue traditional measurements as well as the verification of the individual dislocation of the soft-tissue points in x and y coordinates. Levene's test application showed statistical evidence of similarity between the groups on the beginning of the research. The statistical analysis showed significant alterations (p<0,05) of either skeletal convexity, width of upper and lower lips, and lower lip length, or skeletal and soft-tissue vertical height. On the other hand, there was no significant change on soft-tissue convexity and upper lip length in the treated patients. It can be concluded that the use of bionator had a favorable effect on soft-tissue profile, especially on lips and vertical facial height.
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Melo, Júnior Djalmyr Brandão de Carvalho. "COMPARAÇÃO DA EFICIÊNCIA OCLUSAL DO TRATAMENTO ORTOPÉDICO COM O REGULADOR DE FUNÇÃO FRÄNKEL-2 E BIONATOR DE BALTERS POR MEIO DO ÍNDICE PAR." Universidade Metodista de São Paulo, 2010. http://tede.metodista.br/jspui/handle/tede/1276.
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Previous issue date: 2010-04-16The objective of this retrospective study was to compare the occlusal efficiency of orthopedic treatments using the Fränkel-2 regulator (RF 2) and Balters Bionator functional appliances, treated during different dental development stages, and compare them to a control group. The sample consisted of 45 documented records, belonging to the Dental School graduate program with a concentration area in orthodontics at the Methodist University of São Paulo. All records featured an initial Class II division 1 bilateral malocclusion. Of these, 15 patients were treated with the Bionator (group 1), with average initial age of 8.56 years and 80% of cases in dental development stage-2 (DS 2); 15 patients were treated with RF 2 (group 2), with average initial age of 10.71 years and 80% of cases in dental development stage -3 (DS 3); and a control group with 15 patients (group 3), with average initial age of 10.03 years and with dental development stage compatible both with groups 1 and 2. The groups were divided into two phases, according to the evaluation period: T1: beginning of treatment, and T2: final treatment, totaling 90 pairs of models. The occlusal evaluations were performed in plaster models, using the PAR index with the aid of the PAR ruler and a properly calibrated digital micrometer caliper. For intergroup comparison, ANOVA and Tukey test were used. The severity of the malocclusions (INITIAL PAR) was similar in all groups; however, the final PAR index showed a statistically significant difference, in which the percentile reduction for the PAR index was 20.72% for group 1, 60.06% for group 2, and no significant difference in the final PAR index for group 3. The present study concludes that the treatment for Class II division 1 malocclusion is more efficient when is begins during dental development stage-3 (DS 3) than in dental development stage-2 (DS 2). Moreover, importance is given to a more prolonged use of the dental appliance, as patients in group 2 showed better occlusal results.(AU)
O objetivo deste estudo retrospectivo foi comparar a eficiência oclusal do tratamento ortopédico com os aparelhos funcionais Regulador de Função Fränkel-2 e Bionator de Balters em um estágio de desenvolvimento dental diferente e comparar com um grupo controle. A amostra constituiu-se de 45 registros de documentações, pertencentes ao arquivo do programa de pós-graduação em Odontologia, área de concentração Ortodontia, da Universidade Metodista de São Paulo, com má oclusão inicial de Classe II bilateral, divisão 1, sendo 15 pacientes provenientes do grupo tratados com Bionator (grupo 1) com média de idade incial de 8,56 anos e com 80% dos casos em um estágio de desenvolvimento dental-2 (DS 2), 15 pacientes tratados com RF-2 (grupo 2) com média de idade inicial de 10,71 anos e com 80% dos casos em um estágio de desenvolvimento dental-3 (DS 3), e 15 pacientes controle (grupo 3) com media de idade incial de 10,03 anos e com estágio de desenvolvimento dental compatível com os grupos 1 e 2. Os grupos foram divididos em duas fases, de acordo com o período de avaliação: T1:início de tratamento e T2: final de tratamento, totalizando 90 pares de modelos. As avaliações oclusais foram realizadas em modelos de gesso, utilizando o Índice PAR com auxílio da régua PAR e de um paquímetro digital devidamente calibrado. Para comparação entre os três grupos foi utilizado Análise de Variância a um critério e em seguida o Teste de Tukey. A severidade da má oclusão (PAR Inicial) foi semelhante em ambos os grupos, porém, o PAR final apresentou uma diferença estatisticamente significante onde o percentual de redução do índice PAR para o grupo 1 foi de 20,72%, para o grupo 2 foi de 60,06% e no grupo 3 não houve alteração significante do valor do Índice PAR. O presente estudo conclui que o tratamento da má oclusão de Classe II, 1a divisão é mais eficiente quando iniciado no estágio de desenvolvimento dental 3 (DS 3) do que no estágio de desenvolvimento dental 2 (DS2). Além disso, ressalta-se a importância do uso mais prolongado do aparelho ortopédico, já que os pacientes do grupo 2 apresentaram melhores resultados oclusais.(AU)
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Paulin, Ricardo Fabris. "Padrão rotacional das estruturas dentofaciais natural e induzido pelo tratamento com aparelho de Thurow modificado : estudo cefalométrico com implantes metálicos /." Araraquara : [s.n.], 2004. http://hdl.handle.net/11449/95813.
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Orientador: Ary dos Santos PintoBanca: Dirceu Barnabé Raveli
Banca: Adriano Gonçalves Barbosa de Castro
Resumo: Este estudo prospectivo foi realizado com o objetivo de avaliar o padrão rotacional das estruturas dentofaciais natural e induzido pelo tratamento com o extrabucal de Thurow modificado. Os pacientes tratados tinham entre 7 e 10 anos de idade, leucodermas, portadores de mordida aberta anterior, má oclusão de Classe II divisão 1 com tendência a crescimento vertical e apresentavam implantes metálicos na maxila e mandíbula, conforme proposto por Bjork15 (1955), sendo utilizado para comparação um grupo de pacientes com má oclusão Classe II divisão 1 de Angle, sem tratamento e em igual número, do Burlington Growth Center, Departamento de Ortodontia da Faculdade de Odontologia, Universidade de Toronto, Canadá. Foram realizadas radiografias cefalométricas em norma lateral iniciais e após 1 ano de tratamento no grupo experimental e no grupo controle as radiografias foram tomadas aos 6, 9 e 12 anos de idade. Os traçados foram escaneados e dezenove pontos cefalométricos marcados no programa Radiocef Studioâ, aonde foram traçadas linhas, planos e realizadas as medidas cefalométricas tradicionais e as utilizando os pontos fiduciais. A análise dos dados obtidos mostrou que o uso do aparelho extrabucal de Thurow modificado resultou em acentuada rotação horária do plano palatino e rotação anti-horária da linha de implante maxilar, enquanto que o efeito do crescimento natural havia sido de leve rotação horária da linha de implante e estabilidade do plano palatino; o padrão de rotação mandibular decorrente do crescimento natural mostrou tendência de rotação anti-horária e no grupo experimental houve aumento desse padrão; e em relação ao plano oclusal, houve aumento da inclinação do plano oclusal superior e diminuição na inclinação do plano oclusal inferior. Pode ser concluído que o uso do aparelho de Thurow modificado levou à correção... (Resumo completo, clicar acesso eletrônico abaixo).
Abstract: This prospective study aimed to evaluate the natural rotational pattern of the dentofacial structures and the one induced by the treatment with the modified Thurow appliance. The treated patients had from 7 to 10 years old, were leucoderm and presented an anterior openbite and a Class II division 1 malocclusion with a vertical growth pattern. In all of the patients there were metallic implants inserted in the maxilla and mandible, as proposed by Björk15 (1955). An equivalent control group of Class II division 1 patients with no treatment was used and collected at the Burlington Growth Center, Orthodontic Department of the Dental School, University of Toronto, Canada. Lateral cephalometric radiographs at the onset and after an one year treatment were taken for the experimental group, and at the ages of 6, 9 and 12 years for the control group. The tracings were scanned, 19 cephalometric points, being 6 fiducial ones, were identified by the use of Radiocef Studio ® software, lines and planes were traced, and cephalometric measurements were performed. The data obtained showed that the use of the modified Thurow appliance resulted into great clockwise rotation of the palatal plane and counterclockwise rotation of the maxillary implant line, while the natural growth effect was of slightly clockwise rotation of the implant line and stabilization of the palatal plane; the mandibular rotational pattern showed a tendency of counterclockwise rotation in the non treated patients and in the experimental group there was an increase in this pattern, and in relation to the oclusal plane, there was an increase in the tipping of the upper oclusal plane and decrease of the lower oclusal plane. It can be concluded that the use of the modified Thurow appliance resulted into correction of the Class II open bite malocclusion by a clockwise rotation of the palatal plane, counterclockwise... (Complete abstract, click electronic address below).
Mestre
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Fraser, Andrew Gordon. "The elimination of susceptibility bias in the study of adult female class II division 1 cases treated either with orthognathic surgery or orthodontics : a project report submitted as partial fulfilment for the degree of Master of Dental Surgery /." Title page, contents and summary only, 1997. http://web4.library.adelaide.edu.au/theses/09DM/09dmf841.pdf.
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Wall, Matthew D. 1977. "Association Analysis of Class II Division 2 Malocclusion and Two Genes Linked to Hypodontia (MSX1 and PAX9)." Thesis, 2009. http://hdl.handle.net/1805/1927.
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Indiana University-Purdue University Indianapolis (IUPUI)Purpose of the Study: Determine if there is an association of the CII/D2 malocclusion and genes linked to hypodontia, namely PAX9 and MSX1. Methods and Materials: One hundred probands with CII/D2 and one hundred non-CII/D2 with no hypodontia were enrolled in this study. Clinical exam, photographs, models, radiographs, and saliva were gathered. DNA was isolated from the saliva and sent for genetic analysis. Single Nucleotide Polymorphisms (SNPs) from the PAX9 and MSX1 genes were analyzed using the LightCycler® 480 to verify the presence of each with the CII/D2 malocclusion. A Hardy-Weinberg test was used to screen for genotyping errors, then a chi-square test was used to evaluate the association of the SNP genotypes. A p-value of 0.05 was considered significant. Results: The Hardy-Weinberg test showed no significant differences between observed and expected counts thus we used them for association analysis. Chi-square analysis indicated no significant association between CII/D2 and the MSX1 rs3821949 and the PAX9 1955734 genotypes. Although a p-value of 0.06 for the PAX9 rs8004560 suggested association, it was considered a grey area and insufficient to conclude that there was significant association. Since the SNP PAX9 rs8004560 was insufficient, additional statistical analysis was also performed on the PAX9 rs8004560 genotype of the CII/D2 affected subjects reported to have hypodontia of any tooth including third molars and excluding third molars. A chi-square test yielded a p-value of 0.08 on the analysis of CII/D2 with hypodontia for any permanent tooth except third molars, which suggested association, but insufficient to conclude a significant association. All other analyses indicated a lack of association of the PAX9 rs8004560 SNP. Conclusions: There is no significant association of CII/D2 and the SNPs MSX1 rs3821949 and PAX9 rs1955734. There is a suggestion that there is an association of the SNP PAX9 rs8004560 and CII/D2. There is a suggestion that there is an association of SNP PAX9 rs8004560 and CII/D2 subjects with hypodontia of any tooth except third molars.
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Yousefi, Babak. "Effect of the Bimler functional appliance treatment on Class II division 1 patients." 2008. http://proquest.umi.com/pqdweb?did=1546799121&sid=17&Fmt=2&clientId=39334&RQT=309&VName=PQD.
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Thesis (M.S.)--State University of New York at Buffalo, 2008.Title from PDF title page (viewed on Dec. 4, 2008) Available through UMI ProQuest Digital Dissertations. Thesis adviser: Preston, C. Brian Includes bibliographical references.
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Lopes, Magali Aires. "Classe II divisão 2 - biótipo facial e padrão de crescimento esquelético segundo análise geométrica: estudo científico." Master's thesis, 2017. http://hdl.handle.net/10284/6349.
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Edward H. Angle desenvolveu um sistema de classificações dentárias quanto á posição ântero-posterior dos caninos e molares permanentes maxilares, Angle sugeriu ainda uma divisão da classe II quanto á posição do setor anterior. A classe II divisão 2 tem uma prevalência relativamente baixa na população ortodôntica, e o seu tratamento constitui um verdadeiro desafio para os ortodontistas.
Objetivos: O presente estudo procura classificar a classe II divisão 2 dentária quanto ao seu biótipo facial e divergência esquelética.
Métodos: Foram selecionadas 200 telerradiografias de perfil onde havia sido efetuada a análise cefalométrica AGIHF por um ortodontista experiente. Apenas 9 corresponderam a Classe II divisão 2 de Angle diagnosticada clinicamente, com o desenvolvimento craniofacial já concluído.
Resultados: Os resultados foram obtidos por meio de cálculo das percentagens para as varáveis qualitativas: género, tipo facial, discrepância esquelética e padrão de crescimento vertical facial.
Conclusões: Embora tenha sido confirmada a tendência para esta subdivisão desenvolver um padrão esquelético de Classe II e um Biótipo Braquifacial, demonstrou-se adequado associá-la a várias possibilidades de desenvolvimento craniofacial.
A controvérsia na classificação e caracterização desta classe persiste em constituir um desafio para os ortodontistas e um estímulo para as investigações futuras.Edward H. Angle developed a dental classification system for the anteroposterior position of the permanent maxillary canines and molars. Angle also suggested a division of Class II regarding the position of the anterior teeth. Class II division 2 has a relatively low prevalence in the orthodontic population, and its treatment is a real challenge for orthodontists. Objectives: The present study aims to classify class II dental division 2 as to its facial biotype and skeletal divergence. Methods: 200 profile cephalograms were selected where had been carried out AGIHF analysis by an experienced orthodontist. Only 9 corresponded to Class II division 2 of Angle diagnosed clinically, with craniofacial development already completed. Results: The results were obtained by calculating the percentages for the qualitative variables: gender, facial type, skeletal discrepancy and facial vertical growth pattern. Conclusions: Although the tendency for this subdivision to develop a Class II skeletal pattern and a Brachyfacial biotype has been confirmed, it has been found appropriate to associate it with various possibilities of craniofacial development. The controversy in the classification and characterization of this class remains a challenge for orthodontists and a stimulus for future research.
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Cheng-Kuan, Shen. "The Dentofacial Morphometry of Class II Division 1 malocclusion." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0011-1901200710484100.
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Huang, Cheng-Tsung, and 黃丞聰. "Deep overbite components in Angle Class II division I Malocclusion." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/78154286248451654692.
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碩士國立陽明大學
臨床牙醫學研究所
93
Excessive deep overbite is frequently encountered in patients with Angle Class II division I malocclusion. Deep overbite not only influence esthetics, periodontal health but also increase the complexity of orthodontic treatment because it combines horizontal and vertical problems. Instability and relapse of treatment result may also occur. Most deep bite problems will not self-correct and may result from different etiology. Therefore, successful treatment of deep overbite should be based on correct differential diagnosis. The purpose of this study was to find out the skeletal and dental components of deep overbite in Angle class II Division 1 patients by comparing deep overbite patients with those with normal overbite patients. Lateral cephalograms of thirty-seven adults with deep overbite and thirty-six controls were collected and skeletal and dental characteristics were studied and analyzed by independent t-test. The results showed that compared to deep overbite group,our control group presented larger the sum of saddle angle, articular angle, gonial angle, more retruded pogonion, larger SN-MP, PP-MP, lower gonial angle, smaller PFH/AFH ratio, larger U1-PP (angle), U1-NA(angle), U1-NA (distance) and L1-Apog, but smaller interincisal angle. U1m-L1m and U1m-L1m/U1PP-L1MP ratio were also larger. Deep overbite group showed larger U1-PP/LAFH, L1-BS plane, and curve of spee. Our results suggested that deep bite problems in class II division 1 patients are associated with supereruption of upper and lower incisors.Therefore, deep bite problems could be resolved by intruding incisors. Furthermore, class II division 1 deep bite patients also presented hyperdivergent skeletal pattern and increased anterior facial height. Therefore,extrusion of posterior teeth or large amount increase anterior facial height may also worsen the anterior-posterior discrepancy.
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Pitout, Etienne. "Comparison of second molar development in subjects with class I, class II-1, class II-2, and class III skeletal growth patterns." Thesis, 2015. http://hdl.handle.net/10539/22463.
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A research project submitted to the postgraduate committe
in partial fulfilment of the requirements for the
degree of
Master of Dentistry
in the branch of
ORTHODONTICS, B.Ch.D., P.D.D, M.D.S.
Parktown, Johannesburg
2015Class II-2 is a difficult malocclusion to treat. Early treatment is recommended, entailing distal movement of the maxillary first molars, which can result in impaction of the second molars. This could be avoided if the developmental stage of the maxillary second molar were known. Objectives: To compare the ages at which the maxillary second molars reach specific developmental stages for subjects with Class I, Class II-1, Class II-2, and Class III skeletal growth patterns. Methods: Records from the Michigan Growth Study, which contains longitudinal data for over 300 Caucasian subjects of Northern European descent, were searched for subjects having Class I, II-1, II-2 or Class III occlusal patterns, based on their last available plaster casts and cephalometric radiographs. ANB of ≥ 5° was regarded as Class II while that ≤ 0° was considered Class III. An attempt was made to match the Class II–1 and Class I to the Class II-2 and Class III subjects.. All available records for Class II-2 and Class III subjects were included in the study as those were rare. The age at which each of the second molars of each patient reached the development stages described by Demirjian (1973) were established using the serial lateral oblique radiographs which were available. The GLM procedure in SAS was used to compare the data among and within the skeletal patterns. Results: There were no significant differences among the four skeletal patterns as related to the developmental stages of the second molars. However, the developmental stages were reached at significantly different ages. Conclusion: There were no statistically significant differences in the stages of development of the second molars among Class I, Class II-1, Class II-2 and Class III subjects.
MT2017
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Pereira, Pedro Manuel Mariano. "Diferentes formas de manisfestação da retro-inclinação incisiva na Classe II Divisão 2 - Estudo epidemiológico, genético e morfológico." Tese, 2012. https://repositorio-aberto.up.pt/handle/10216/76346.
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Pereira, Pedro Manuel Mariano. "Diferentes formas de manisfestação da retro-inclinação incisiva na Classe II Divisão 2 - Estudo epidemiológico, genético e morfológico." Doctoral thesis, 2013. https://repositorio-aberto.up.pt/handle/10216/76346.
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Guo, Wenyan. "Regulation of MHC class II signaling /." 2003. http://proquest.umi.com/pqdweb?did=765336281&sid=33&Fmt=2&clientId=9268&RQT=309&VName=PQD.
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Yi-ching, Yu, and 游宜靜. "Geometric morphometry of the midfacial complex and mandible in children with Angle Class II,Division 1 malocclusion." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/3tm88t.
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碩士高雄醫學大學
牙醫學研究所
91
The incidence of Angle Class II malocclusion for children in Taiwan is between 17~29 percent. The purpose of this study was to evaluate whether the morphology of the midfacial complex and mandible differed in normal occlusion and Angle Class II, division 1 malocclusion children, and to localize differences with finite-element method and thin-plate spline analysis. This study comprised lateral cephalographs of 70 Taiwan children with normal occlusion (35 girls and 35 boys), and 70 Taiwan children with Class II, division 1 malocclusion (35 girls and 35 boys). The cephalographs were traced. 10 homologous landmarks of the midfacial complex and 12 homo- logous landmarks of the mandible were identified and digitized. The student t-test and Hotelling’s T2 statistics were used to analyze 14 linear and angular measurements of the midfacial complex, and 16 linear and angular measurements of the mandible, for evaluation of the differences at the conventional cephalometric values between normal and Class II, division 1 subjects. The average configuration of each group was generated by the Procrustes analysis. These configurations were employed for geometric morphometry: finite-element method and thin-plate spline analysis. In the midfacial complex, the results showed that the maxilla was protru- sive in the midfacial complex of Class II malocclusion subjects, and the major size-enlarged area was at the posterior horizontal length of maxilla (MPP-PNS). The average size of the middle region (around Or point) of upper middle facial complex was reduced in the Class II malocclusion boys. In the graphical analysis, the most severe shape-change of the Class II malocclusion subjects was at the premaxilla and the alveolar ridge area, and these area revealed significant extension toward downward and forward. In the mandible, the total length and the gonial angle were reduced in the Class II malocclusion subjects at the conventional cephalometric values. But in the strain tensor and thin-plate spline pictures, the area around gonial angle showed a little size increasing in the Class II boys. The mandibular body length and ramus width were no significant difference between Class II children and normal subjects. In the graphical analysis, we found that the condylar region showed extension, and the posterior border of ramus showed forward compression in the Class II malocclusion subjects. Besides, the chin was retruded and lower border of mandibular body showed counterclockwise, upward compressive rotation. Because of the reduced mandibular total length, the anterior alveolar ridge showed the compen- sative upward and forward extension in the Class II malocclusion subjects. Due to these differences, we concluded that the configurations of the midfacial complex and the mandible of the Taiwan Class II, division 1 malocclusion children were different to the normal occlusion configure- tions.
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Angelino, André de Brito. "Tratamento da classe II divisão 1 na dentição mista." Master's thesis, 2016. http://hdl.handle.net/10284/5612.
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Introdução: Os indivíduos portadores da má oclusão de Classe II Divisão 1 possuem diversas etiologias e podem ser encontrados em todas as etnias. As suas características clínicas e radiográficas se agravam com o crescimento e uma vez não tratada, continuam com esta má oclusão por toda sua vida. Para o tratamento ortodôntico na dentição mista recorre-se a dispositivos como aparelhos extra-orais, aparelhos funcionais fixos e removíveis.
Objetivo: O objetivo deste trabalho é fazer uma revisão sobre o diagnóstico e tratamento da Classe II Divisão 1 na dentição mista, salientando a importância do tratamento nesta fase.
Materiais e Métodos: Para a concretização do presente trabalho foi realizada uma revisão bibliográfica no presente ano, recorrendo-se ao livro “Ortodontia Contemporânea” do autor William Proffit, diversos motores de busca online, nomeadamente, PubMed, Medline, Elsevier e Scholar Google, utilizando como palavras-chave: “Class II Division 1”, “Mixed Dentition”, “Functional Appliance”, “Extra-Oral Appliance”, e revistas de Ortodontia, nomeadamente, American Journal of Orthodontics, Seminars in Orthodontics, The Angle Orthodontist e Dental Press de Ortodontia e Ortopedia Facial. A pesquisa foi realizada sem qualquer tipo de limites temporais, sendo dada uma maior importância a artigos mais recentes. Os artigos foram selecionados segundo o seu rigor científico e interesse para o tema. Numa fase mais avançada de revisão bibliográfica foram usados artigos citados na bibliografia dos artigos selecionados na primeira pesquisa efetuada.
Conclusão: A dentição mista é considerada a fase ideal para iniciar o diagnóstico, prevenção, interceção e possível correção dos problemas dentários e/ou esqueléticos associados a uma Classe II Divisão 1. A Ortopedia Funcional dos Maxilares, removível ou fixa, e o uso de aparelhos extra-orais constituem recursos terapêuticos disponíveis para o tratamento desta má oclusão.Introduction: Individuals with malocclusion Class II Division 1 have different etiologies and can be found in all ethnic groups. The clinical and radiographic features are aggravated with the growth and once left untreated continue with this malocclusion throughout his life. For its orthodontic treatment in the mixed dentition, devices are resorted such as extra-oral appliances, fixed and removable functional appliances. Objective: The objective of this study is to review the diagnosis and treatment of Class II Division 1 in the mixed dentition, emphasizing the importance of its treatment at this stage. Materials and Methods: A literature review was carried out, this year, resorting to the book “Contemporary Orthodontics” by William Proffit, several online search engines, namely, PubMed, Medline, Elsevier and Google Scholar using as keywords: “Class II Division 1”, “Mixed dentition”, “Functional Appliance”, “Extra-Oral Appliance”, and orthodontics journals, including American Journal of Orthodontics, Seminars in Orthodontics, the Angle Orthodontist and Dental Press of Orthodontics and Dentofacial Orthopedics. The research was carried out without any time limits despite being given greater importance to more recent articles. Articles were selected according to their scientific rigor and interest to the theme. In a more advanced stage of literature review were used articles cited in the bibliography of selected articles on the first search performed. Conclusion: The mixed dentition is considered the ideal stage to start the diagnosis, prevention, interception and possible correction of dental problems and/or associated to a skeletal Class II Division 1. The functional orthopedics, removable or fixed, and the use of extra-oral appliances are available therapeutic resources for the treatment of this malocclusion.
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Freeman, David C. "Long-term treatment effects of the FR-2 appliance of Fränkel." 2007. http://catalog.hathitrust.org/api/volumes/oclc/166870219.html.
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Laparidis, Constantinos. "A retrospective cephalometric study of the effect of the Frankel appliance, the ClarkTwin Block and the activator on class II division / by Con Laparidis." 1999. http://hdl.handle.net/2440/19456.
Full textAbstract:
Bibliography: leaves 187-211.288 leaves : col. ill. ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
An observational retrospective study to determine if any difference exists in the soft tissue profile of Class II division 1 patients before and after treatment with three different functional appliances; the activator with headgear, the Clark Twin Block, and the Frankel.
Thesis (M.D.S.)--University of Adelaide, Dept. of Dentistry, 1999