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1.
Bauru; s.n; 2017. 103 p. ilus, tab.
Thesis in English | LILACS, BBO - Dentistry | ID: biblio-884366

ABSTRACT

Purpose: The aim of this study was to evaluate the occlusal and arch form stability of self-ligating Damon System appliance treatment, after a mean period of 3 years. Methods: The sample consisted of 20 patients (10 female and 10 male) Class I malocclusion with mild to moderate crowding treated orthodontically without extractions, with a mean initial age of 14.66 years (SD +1.40), mean final age of 17.70 years (SD +1.39) and mean age at posttreatment of 20.62 years (SD +1.42). The mean treatment time was 3.03 years (S.D. +1.17) and the mean posttreatment time was 2.92 years (S.D +0.88). Initial, final and posttreatment dental casts and panoramic radiographs of each patient were evaluated. Crowding, transverse and anteroposterior arch dimensions were measured in digital models in the maxillary and mandibular dental arches. For evaluation of the occlusal stability of orthodontic treatment it was used the Objective Grading System (OGS) in dental casts and panoramic radiographs. Intragroup comparison of all variables evaluated was performed by ANOVA and Tukey test, when necessary. For OGS comparison the dependent T test were used. Intragroup comparison of all variables evaluated was performed by ANOVA and Tukey test, when necessary. For OGS comparison the dependent T test used. Results: During treatment, there was significant decrease in the Little's Irregularity Index in maxillary and mandibular arches. No statistically significant changes in the Little's Irregularity Index were found during the follow-up period after debonding in a mean period of 2.9 years. There was significant increase in all measurements of the maxillary arch width and arch length with treatment. The mandibular measurements of arch width and arch length also showed a significant increase during treatment. At posttreatment, all maxillary and mandibular measurements remained stable, with no significant relapse of arch changes. The OGS index did not show significant changes during the posttreatment period. Conclusions: Treatment with self-ligating Damon System appliances showed increase in maxillary and mandibular arch widths and lenghts, which remain stable after a mean period of 3 years posttreatment. Treatment with this system provides maxillary and mandibular incisor alignment, as defined by Little's Irregularity index, and occlusal stability, as defined by the OGS score, with stability after a mean period of 3 years posttreatment.(AU)


Objetivo: O objetivo deste estudo foi avaliar a estabilidade oclusal e a estabilidade da forma do arco em pacientes tratados com aparelho autoligável do Sistema Damon. Material e métodos: A amostra foi constituída por radiografias panorâmicas e modelos de gesso iniciais (T1), finais (T2) e pós-tratamento (T3) de 20 pacientes (10 homens e 10 mulheres) com má oclusão de Classe I, apinhamento moderado a severo, tratados ortodonticamente sem extrações. Os pacientes apresentaram idade inicial média de 14,66 anos (D.P= +1,40), idade final média de 17,70 anos (D.P= +1,39), tempo médio de tratamento 3,03 anos (D.P= +1,17), idade de pós-tratamento média de 20,62 anos (D.P= +1,42) e tempo médio de pós tratamento de 2,92 anos (D.P= +0,88). O Índice de Estabilidade Oclusal (OGS), foi avaliado por meio de modelos de gesso e radiografias panorâmicas. As medidas transversais, sagitais e o Índice de irregularidade de Little foram realizadas utilizando-se modelos de gesso que foram digitalizados com o scanner 3Shape R700 3D (3Shape A/S, Copenhagen, Dinamarca) e mensurados através do Software OrthoAnalyzerTM 3D (3Shape A / S, Copenhagen, Dinamarca). Para comparação intragrupo de todas as variáveis avaliadas entre as fases inicial (T1), final (T2) e controle (T3), ANOVA e teste de Tukey foram utilizados. Para avalição do OGS foi utilizado o teste t dependente. Resultados: No arco superior todas as medidas da forma e comprimento do arco apresentaram um aumento com o tratamento (T2-T1), com exceção do Índice de Irregularidade de Little que diminuiu significantemente com o tratamento. As medidas mandibulares da forma e comprimento do arco também tiveram um aumento significante com o tratamento, já o Índice de Irregularidade de Little diminuiu significantemente. No período pós-tratamento (T3-T2) todas as medidas maxilares e mandibulares permaneceram estáveis, não apresentando recidiva significante da forma do arco e do Índice de Irregularidade de Little. O índice OGS não apresentou alterações significantes do fim do tratamento para o controle. Conclusão: O tratamento com aparelho autoligável do Sistema Damon apresentou aumentos na forma e comprimento do arco, mantendo-se estáveis após o período de contenção. O tratamento com este Sistema promoveu o alinhamento dos incisivos tanto superiores quanto inferiores, com resultados oclusais estáveis após um período médio de 3 anos pós-tratamento.(AU)


Subject(s)
Humans , Male , Female , Adolescent , Dental Arch/pathology , Dental Occlusion , Malocclusion, Angle Class I/therapy , Orthodontic Appliances , Analysis of Variance , Dental Arch/diagnostic imaging , Malocclusion, Angle Class I/diagnostic imaging , Orthodontic Appliance Design , Radiography, Panoramic , Time Factors , Treatment Outcome
2.
Bauru; s.n; 2015. 78 p. ilus, tab.
Thesis in English | BBO - Dentistry | ID: biblio-879488

ABSTRACT

Objetivo: Comparar as alterações na posição dos incisivos e na forma dos arcos superior e inferior em casos tratados com o sistema Damon, e com bráquetes convencionais, com e sem a realização de expansão rápida da maxila (ERM). Metodologia: A amostra foi composta por 75 pacientes com má oclusão de Classe I, apinhamento suave a moderado, tratados ortodonticamente sem extrações. Grupo 1:23 pacientes com idade média inicial de 14,65 anos, tratados com aparelhos autoligáveis do Sistema Damon, por um perído médio de 2,72 anos; Grupo 2: 24 pacientes com idade média inicial de 13,85 anos, tratados com ERM seguido por aparelhos fixos convencionais, por um período médio de 2,17 anos; Grupo 3: 28 pacientes com idade média inicial de 13,94 anos, tratados com aparelhos convencionais, por um perído médio de 2,20 anos.Os modelos de gesso e as telerradiografias foram avaliados ao início e ao final do tratamento. A comparação intergrupos das variáveis foi realizada através do teste ANOVA e o teste de Tukey quando necessário. Resultados: As distâncias intercaninos, inter-segundospremolares e intermolares superiores apresentaram um maior aumento nos grupos Damon e ERM. Na arcada inferior, as larguras do arco mostraram um maior aumento no grupo Damon em comparação aos outros dois grupos. Houve uma maior protrusão dos incisivos superiores no grupo Damon em relação aos outros dois grupos. Nos incisivos inferiores, o Damon causou uma maior protrusão e vestibularização quando comparado com o grupo convencional. Conclusão: A forma do arco superior mostrou aumentos semelhantes na maioria das distâncias para o tratamento com o aparelho Damon e ERM com aparelhos convencionais. A forma do arco inferior mostrou maior aumento na maioria das distâncias medidas em casos tratados com o aparelho Damon, em comparação aos casos tratados com aparelho convencional, com e sem ERM. O aparelho Damon causou maior protrusão dos incisivos superiores. Nos incisivos inferiores o aparelho Damon causou uma maior protrusão e vestibularização quando comparado apenas com o aparelho convencional.(AU)


Purpose: To compare the changes in the maxillary and mandibular dental arch forms and in incisors position in orthodontic cases treated with Damon and conventional appliances, with and without rapid maxillary expansion (RME). Methods: Sample comprised 75 Class I malocclusion patients with mild to moderate crowding treated orthodontically without extractions. The sample was divided into 3 groups: Group 1: 23 patients (mean initial age: 14.65 years) treated with Damon System for a mean period of 2.72 years; Group 2: 24 patients (mean initial age: 13.85 years) treated with RME followed by conventional fixed appliances for a mean period of 2.17 years; Group 3: 28 patients (mean initial age: 13.94 years) treated with conventional fixed appliances for a mean period of 2.20 years. Pretreatment and posttreatment dental casts and cephalograms of each patient were evaluated. Intergroup comparison of the variables was performed by ANOVA and Tukey test. Results: The maxillary intercanine, inter-second-premolar and intermolar widths showed a greater increase in Damon and RME groups. In the mandibular arch, the arch widths showed a greater increase in Damon group compared to the other two groups. There was greater protrusion of the maxillary incisors in Damon group than in the other 2 groups. For the mandibular incisors, Damon caused a greater protrusion and proclination when compared to the conventional appliance. Conclusions: The maxillary arch form showed similar increases in most of the distances to treatment with Damon and RME plus conventional appliances. The mandibular arch showed a greater increase in most of the measured distances in cases treated with Damon, compared to the conventional appliances with and without RME. Damon caused greater protrusion of the maxillary incisors. In the mandibular incisors, Damon caused a greater protrusion and proclination when compared to conventional appliance only.(AU)


Subject(s)
Humans , Male , Female , Adolescent , Cephalometry/methods , Malocclusion, Angle Class I/therapy , Orthodontic Appliances , Orthodontic Brackets , Palatal Expansion Technique , Analysis of Variance , Incisor/anatomy & histology , Mandible/anatomy & histology , Maxilla/anatomy & histology , Reproducibility of Results , Time Factors , Treatment Outcome
3.
Case Rep Dent ; 2014: 868390, 2014.
Article in English | MEDLINE | ID: mdl-25431691

ABSTRACT

The aim of the present case report is to describe the orthodontic-surgical treatment of a 17-year-and-9-month-old female patient with a Class III malocclusion, poor facial esthetics, and mandibular and chin protrusion. She had significant anteroposterior and transverse discrepancies, a concave profile, and strained lip closure. Intraorally, she had a negative overjet of 5 mm and an overbite of 5 mm. The treatment objectives were to correct the malocclusion, and facial esthetic and also return the correct function. The surgical procedures included a Le Fort I osteotomy for expansion, advancement, impaction, and rotation of the maxilla to correct the occlusal plane inclination. There was 2 mm of impaction of the anterior portion of the maxilla and 5 mm of extrusion in the posterior region. A bilateral sagittal split osteotomy was performed in order to allow counterclockwise rotation of the mandible and anterior projection of the chin, accompanying the maxillary occlusal plane. Rigid internal fixation was used without any intermaxillary fixation. It was concluded that these procedures were very effective in producing a pleasing facial esthetic result, showing stability 7 years posttreatment.

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