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Adjunctive orthodontic treatment of pathologically migrated incisors in adults with periodontitisChien, Yin-jung, Angela. January 2004 (has links)
Thesis (M.D.S.)--University of Hong Kong, 2004. / Also available in print.
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Hyalinization of the periodontal ligament incident to orthodontic tooth movementRygh, Per. January 1974 (has links)
Thesis--Bergen. / Extra t.p. with thesis statement inserted. Includes bibliographical references.
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Comparison of stability, pulpal response and periodontal support of palatally impacted maxillary canines which are surgically exposed with those which are encouraged to erupt naturally /Ling, Kwok Ki. January 2005 (has links) (PDF)
Thesis (M.D.Sc.) - University of Queensland, 2005. / Includes bibliographies.
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Adjunctive orthodontic treatment of pathologically migrated incisors in adults with periodontitis /Chien, Yin-jung, Angela. January 2004 (has links)
Thesis (M.D.S.)--University of Hong Kong, 2004.
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A histologic study of cranial and craniofacial sutures and a synchondrosis following rapid palatal expansion in Rhesus monkeys,Farmer, Richard Bartholomew. January 1975 (has links)
Thesis (M.S.)--Ohio State University, 1975. / Bibliography: leaves 51-55. Available online via OhioLINK's ETD Center.
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Roentgenographic analysis of the palatal plane in the Macaca mulatta monkey with rapid palatal expansion /Maki, Karl A. January 1975 (has links)
Thesis (M.S.)--Ohio State University, 1975. / Bibliography: leaves 36-39. Available online via OhioLINK's ETD Center.
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The effect of divergency on the transverse relationshipWerbitt, Jonathan Andrew 28 September 2016 (has links)
INTRODUCTION: The aim of this study was to determine if there is a correlation between divergency, age, and the transverse width of the maxilla and mandible at the first molar level, as well as the angulation of the 1st molar teeth.
MATERIALS AND METHODS: CBCT images of 94 patients between the ages of 12-62 were selected randomly and concurrently for this retrospective study. Patients were grouped into hypo-, normo- and hyperdivergent groups with Frankfort horizontal to the mandibular plane angle (FMA) <20.5, ≥22-≤28, >29.5 degrees respectively.
RESULTS: The hypodivergent group’s maxilla was on average 1.6 mm wider than that of the hyperdivergent group (p ≤ 0.05). The inclination of the right first maxillary molar showed a R2 value of 0.165 for age alone (p-value = 0.000023), while the inclination of the left first maxillary molar had a R2 value of 0.136 (p-value = 0.003) for both divergency and age. The correlations between hyperdivergent, normodivergent, and hypodivergent groups and the inclinations of the upper molars were R2= 0.13, 0.19, and -0.13 respectively.
CONCLUSIONS: Our study agreed with the literature in that hyperdivergent patients have palatal widths that are narrower than in hypodivergent patients. We saw a positive correlation between age and molar angulations for all ages and divergences except in the left maxillary first molar of the hypodivergent patients where we saw a negative correlation.
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Avaliação cefalométrica e tridimensional das vias aéreas superiores posteriores após avanço maxilo-mandibularCarvalho, Abrahão Cavalcante Gomes de Souza [UNESP] 08 April 2011 (has links) (PDF)
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carvalho_acgs_dr_araca.pdf: 818860 bytes, checksum: fed618e75d0c3b4bd6428f6ccff663ee (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Objetivo: O objetivo deste estudo é avaliar comparativamente as alterações cefalométricas e tridimensionais das vias aéreas de pacientes submetidos à cirurgia ortognática de avanço maxilo-mandibular. Material e Métodos: Foram selecionados 20 pacientes com deformidade dento-facial de classe II, com deficiência maxilomandibular que foram submetidos à cirurgia de avanço maxilo-mandibular. Os pacientes tiveram um período pós-operatório de no mínimo 6 meses. Foram realizadas tomografias computadorizadas de feixe cônico nos períodos pré-operatório (T1), pósoperatório imediato, até quinze dias após a cirurgia (T2) e pós-operatório tardio, pelo menos 6 meses após a cirurgia (T3). Foi realizada a quantificação linear, de área e de volume das vias aéreas superiores posteriores, e comparado com o movimento real alcançado com a técnica cirúrgica dos dois tempos pós-operatórios. Resultados: Nos resultados, o movimento de avanço maxilo-mandibular proporcionou um ganho de vias aéreas em todas as análises, com diferença estatisticamente significativa entre os períodos T2 e T1, e T3 e T1, com um valor de p<0,05. No entanto, ao comparar os períodos T2 e T3, houve uma diferença estatisticamente significativa para as análises de área e de volume, comprovando uma recidiva parcial do ganho em via aérea alcançado em T2. Conclusões: Finalmente, podemos concluir que o avanço maxilo-mandibular é uma técnica cirúrgica que proporciona um ganho linear, de área e volume de vias aéreas superiores posteriores nos períodos pós-operatório imediato e após seis meses, no entanto, o ganho em vias aéreas apresenta uma recidiva parcial em períodos tardios. Também pudemos concluir que a avaliação de vias aéreas através de uma análise cefalométrica linear pode trazer resultados limitados quando comparados aos estudos de área e volume dessa região anatômica / Objective: The purpose of this study is to quantify cephalometric and tridimensional alterations of the posterior airway space of patients undergoing orthognathic surgery of maxillomandibular advancement. Material and Methods: 20 patients were standardized selected with dentofacial deformity of class II, with maxillomandibular deficiency, treated by maxillomandibular advancement. The minimal postoperative period was 6 months. Cone-Beam Computed Tomography were performed in 3 distinct periods of the treated patients, preoperative (T1), immediate postoperative period, until 15 days after surgery (T2), and late postoperative period, at least 6 months after surgery. The posterior airway space were quantified in each period of each patient, and the results were compared with the real movement achieved with the surgical technique employed. Results: In the results, the maxillomandibular advancement promoved an increase on posterior airway space of each patient, in all the analysis performed, with a significantly statistic difference between T2 and T1, and between T3 and T1, p<0,05. However, there was a statistic difference between T2 and T3 in the area and volume analysis, what means that the airway space comes narrow after 6 months when compared with the immediate postoperative period. Conclusions: Finally, the maxillomandibular advancement performed a great linear, area and volume increase in posterior airway space in immediate and late postoperative period, however, there is a partial loss of the increased space after 6 months. Also the linear analysis of airway spaces has limited results when compared with area and volume analysis
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Percepção estética de parâmetros ortodônticos por diferentes grupos de indivíduosMachado, André Wilson Lima [UNESP] 12 December 2011 (has links) (PDF)
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machado_awl_dr_arafo.pdf: 689216 bytes, checksum: 67566b580f8a36fb8c2532eb6cfbc191 (MD5) / Universidade Estadual Paulista (UNESP) / Comparar a percepção estética de ortodontistas e leigos frente a três parâmetros: (1) a posição vertical da margem gengival e da borda incisal dos incisivos centrais superiores; (2) a presença de diastemas na região dos incisivos laterais superiores e (3) a presença de assimetrias nas bordas incisais dos incisivos centrais e laterais superiores. Materiais e Métodos: três artigos científicos foram redigidos e utilizados para a avaliação dos propósitos apresentados. Resultados: Os posicionamentos verticais dos centrais superiores considerado mais estético, por ortodontistas e leigos, foi aquele no qual as margens gengivais dos centrais estão ou no mesmo nível da dos caninos ou 0.5mm abaixo. Quando as bordas incisais foram avaliadas, o degrau de 1.0 e 1.5mm entre centrais e laterais foram os mais atrativos. A presença de diastemas na região de incisivos laterais foi considerada antiestética por ortodontistas e leigos, brasileiros e norte-americanos. Em geral, os sorrisos seguiram o seguinte padrão: quanto maior os diastemas e quanto mais mesialmente posicionados, menor o nível de atratividade do sorriso. O sorriso com diastema de 0.5mm na face distal dos incisivos laterais não diferiu do sorriso sem diastemas na avaliação dos ortodontistas e leigos norteamericanos, bem como os leigos brasileiros. Assimetrias na bordas incisais de centrais e laterais foi considerada, em geral, uma característica anti-estética. 14 Os sorrisos avaliados seguiram o seguinte padrão: quanto maior as assimetrias menos atrativos eram os sorrisos e, assimetrias em laterais foram mais aceitáveis esteticamente do que em centrais. A presença de pequena assimetria, de 0.5mm, em centrais foi considerada anti-estética para ortodontistas e leigos. Por outro lado, assimetrias em laterais foram mais toleradas, sendo o limite do aceitável para ortodontistas de 0.5mm e, leigos, de 1.0mm / Determine the smile esthetics perception from orthodontists and laypeople of three smile parameters: (1) vertical upper central incisor positioning; (2) presence of diastemas in upper lateral incisors area and (3) presence of asymmetries in the upper incisor edges. Material and Methods: in order to accomplished our objective three scientific articles were written. Results: The most attractive smile were the one with two major characteristics: the central incisors gingival margins matching the laterals and both 0.5 mm below the line of the canines’ gingival margins and the central-to-lateral incisal step of 1.5 mm. This smile type did not differ statistically to the one with the centrals gingiva margins matching the canines and the central-to-lateral incisal step of 1.5 mm. Brazilian and US orthodontists and laypersons considered the presence of spacing in the upper lateral incisor area unattractive. Generally, the bigger the diastemas and the more mesial, the less attractive was the smile. For the US orthodontists, US laypeople, and Brazilian laypeople the presence of a 0.5 mm diastema in the distal surface of the lateral incisor did not influence the evaluation process, and thus, was not recognized as unattractive. Generally, tooth wear was considered unattractive following a pattern: the greater the tooth wear the more unattractive the smile; tooth wear in the central incisor was considered more unattractive than tooth wear in the lateral. For both group of 17 raters the presence of a 0.5 mm wear in the central incisor was considered unattractive while the threshold for lateral incisors discrepancies was 0.5 mm for orthodontists and 1.0 mm for laypersons
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Relaxamento de tensão em molas T de Beta-Titânio: avaliação e uma possivel soluçãoSilva Junior, Roberto Soares da [UNESP] 24 January 2014 (has links) (PDF)
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000794261.pdf: 1990517 bytes, checksum: f99e3634a60c2ec1af2745195ae3892f (MD5) / Objetivo: Avaliar o relaxamento de tensão de molas T de β-Ti em 12 semanas pela mensuração de seus ângulos e avaliar a modificação do sistema de força em molas T com helicoides em áreas de alta tensão após 48 horas. Materiais e Métodos: Dois capítulos foram elaborados, sendo um para cada objetivo proposto. Resultados: O tempo influenciou as angulações mensuradas (p<0,001), sendo que o grupo imediato foi diferente dos demais grupos avaliados. Houve diferenças entre os ângulos (p<0,001), pois cada um corresponde a uma região da mola. O tempo teve uma interação significante com a deformação dos ângulos das molas (p<0,001). A avaliação do sistema de força das molas T com helicoides foi observado que houve interação entre o tempo e os grupos para os momentos (p<0,001), forças (p=0,018) e M/F (p<0,047), bem como ambos interagiram na desativação das molas nos momentos (p<0,001) e M/F (p=0,006) mas não na força (p=0,14). Os helicoides diminuíram os momentos (p<0,001) e forças (p<0,001), aumentando a M/F (p<0,001), bem como interagiu na desativação das molas, diminuindo a proporção carga-deflexão dos momentos (p<0,001) e forças (p<0,001) produzidos, alterando a M/F (p<0,009). Conclusão: As molas T apresentaram relaxamento de tensão e foram identificadas duas áreas com maior deformação, uma nas dobras entre as hastes verticais e horizontais das molas (ângulos 5 e 6) e outra nas dobras realizadas na haste horizontal (ângulos 8 e 9). A adição de helicoides reduziu a força horizontal e proporção carga/deflexão das molas; o momento produzido assim como a perda de momento por desativação, também foram reduzidos; a proporção momento/força aumentou e se tornou mais estável durante a desativação da alça. / Objective: Evaluate the stress relaxation of T-loop springs over 12 weeks and evaluate the modification in force system T-loop springs with helices added in areas of higher stress after 48 hours. Materials and Methods: Two research papers were prepared and used for the evaluation of aims presented. Results: The time influenced the measured angles (p<.001), and the group immediate was different from the other groups evaluated. There were differences between the angles (p<.001), as each corresponds to a region of the spring. Time was a significant interaction with the deflection angles of the springs (p<.001). The evaluation of system force of T-loop springs with helix was observed that there was an interaction between time and groups for moment (p<.001), force (p=.018) and M/F (p<.047), and both interacted in the deactivation of the springs in moment (p<.001) and M/F (p=.006) but not in force (p=0.14). The helix moments decreased (p<.001), and forces (p<.001) by increasing the M/F (p<.001) and interacted in the deactivation of the springs, reducing the proportion of load-deflection moment (p<.001) and force (p<.001) produced by changing the M/F (p<.009). Conclusion: T-loop springs showed stress relaxation and two areas were identified with greater deformation, one in bends between the vertical and horizontal segments (angles 5 and 6) and another in bends made in the other horizontal segment (angle 8 and 9). The addition of helix reduced horizontal force ratio and load-deflection of the springs, the moment produced as well as loss of time for deactivation were also reduced, the M/F ratio increased and became more stable during the deactivation the spring.
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