Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2014-09-02T11:26:28Z No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Dissertação Joao Francisco Machado do Nascimento.pdf: 721039 bytes, checksum: 2a145e907cf0cfc7e15f26459ae30aff (MD5) / Made available in DSpace on 2014-09-02T11:26:28Z (GMT). No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Dissertação Joao Francisco Machado do Nascimento.pdf: 721039 bytes, checksum: 2a145e907cf0cfc7e15f26459ae30aff (MD5) Previous issue date: 2013-08-14 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / For patients poorly adapted to conventional dentures, the single-implant mandibular overdenture has been proposed as a simplified alternative for the two-implant treatment, together with the use of immediate loading of the implant. The aim of this in vitro study was to compare the photoelastic characteristics of stress transfer to the implant in a single-implant mandibular overdenture using different types of attachments. A photoelastic model of an edentulous mandible with a resilient edentulous ridge and a unique implant located at the symphyseal region was obtained to reproduce a single implant-retained mandibular overdenture. Six 2.0 mm height attachments were selected and inserted in the same photoelastic model in a random order. A universal material testing machine was used to induce axial vertical loads of 70 N applied in the central incisor and in the central region of the first right molar without contact on the contralateral side. The photoelastic analysis was performed using a polariscope integrated into the testing machine. Standard separate views were photographed and evaluated visually for stress-induced fringes, to comparatively rank the different attachment systems. All attachments showed a similar tension distribution concentrated in the apical third, and the highest stress concentration at the apical level. There was a low stress concentration at the coronal third of the implant, with no discernible stress in the first threads of the implants, except for Dalla Bona which showed low stress at the coronal part of the implant (one fringe). No identifiable fringes were observed when the load was applied in the molar region, which resulted from the low amount of stress transmitted by the implant for all attachments. It was concluded that the load transferred to a single mandibular implant is low and within the limits of functional loading, irrespective of the type of retention system. / Implantes osseointegrados vêm sendo utilizados com sucesso para restaurar a função e a estética de pacientes desdentados totais e parciais. No entanto há necessidade de tornar o tratamento de pessoas com necessidade de overdenture retida com implante menos oneroso e mais eficiente. O objetivo deste trabalho foi verificar pela técnica fotoelástica (Qualitativa) as tensões geradas ao redor do implante pela aplicação de carga sobre overdenture mandibular retida por um implante unitário na sínfise da mandibular. Foi confeccionado um modelo de resina fotoelástica Araldite, reproduzido de uma mandibular anatômica, onde foi fixado na região sínfise um implante 3.75x11mm (Titamax Ti Cortical, Neodent, Curitiba, Brasil). Com um modelo foi confeccionada uma prótese total e gingival artificial. Todos os pilares foram posicionados sobre o implante e apertado com 10 Ncm, a fêmea foi capturada de forma direta à prótese, com a réplica da mucosa em posição. Todos foram sucessivamente capturados e levados ‘à máquina de ensaio universal. Com uma carga axial de 70 Ncm na fossa central do 46 e incisal do 41. Foram fotografados em um polariscópio as franjas resultantes das tensões. Foram feitas análises qualitativa dos resultados das tensões sobre o attachment. De acordo com os resultados obtidos pode-se concluir que a carga transferida para o implante, é baixo, independente do sistema de retenção.

Objective: To determine if significant differences exist in timings and rates of Peak Mandibular Growth (PMG) and mandibular projections of subjects with vertical, average and horizontal facial growth patterns. Methods: Sixty-three Caucasian orthognathic subjects with cephalograms (9 to 18 years) available from the Burlington Growth Centre were categorized into average, vertical and horizontal growth pattern groups based on their change in Y axis from age 10 to 16 years. PMG timing and rates were determined and mandibular projections measured. Comparisons were made by ANOVA. Results: Inter-group differences of PMG timing or rate were not statistically significant. Although not statistically significant, PMG of vertically growing females was 14 month earlier than all other subgroups. Horizontal mandibular projection differences approached significance in older children. Conclusions: No statistically significant differences were found in the timing or rate of PMG in different facial growth patterns. Differences in horizontal mandibular projections approached significance with growth.

Objective: To determine if significant differences exist in timings and rates of Peak Mandibular Growth (PMG) and mandibular projections of subjects with vertical, average and horizontal facial growth patterns. Methods: Sixty-three Caucasian orthognathic subjects with cephalograms (9 to 18 years) available from the Burlington Growth Centre were categorized into average, vertical and horizontal growth pattern groups based on their change in Y axis from age 10 to 16 years. PMG timing and rates were determined and mandibular projections measured. Comparisons were made by ANOVA. Results: Inter-group differences of PMG timing or rate were not statistically significant. Although not statistically significant, PMG of vertically growing females was 14 month earlier than all other subgroups. Horizontal mandibular projection differences approached significance in older children. Conclusions: No statistically significant differences were found in the timing or rate of PMG in different facial growth patterns. Differences in horizontal mandibular projections approached significance with growth.

This thesis examines three factors that may influence the change in protein content and size of the brood food glands in honey bees. Effects on the mandibular gland, involved in the production of brood food and in royal jelly, have not been examined in relation to primer pheromones while effects on the hypopharyngeal glands, also involved in the production of brood food, have not been examined in relation to queen mandibular pheromone. This thesis provides preliminary insight into how these pheromones affect the extractable protein content of brood food glands. The first study in this thesis assessed the effects of brood pheromone (BP), queen mandibular pheromone (QMP), and pollen presence on the protein content of hypopharyngeal and mandibular glands of the honey bee. In this study, newly emerged bees were caged for 12 days in one of eight treatments: Queenless state: 1) control (no pollen + no pheromone), 2) pollen, 3) BP, 4) BP + pollen; Queenright state: 1) QMP, 2) QMP + pollen, 3) BP + QMP, 4) BP + QMP + pollen. This study indicated that regardless of pheromone treatment, the most influential factor on gland protein content and size was pollen. The second experiment examined effects of varying pollen dilution on hypopharyngeal and mandibular gland protein content, bee mass, and lipid content of the honey bee. In this experiment, newly emerged bees were caged for 7 days and fed one of five treatments: pollen, 1:1 pollen: cellulose (vol:vol), 1:2 pollen: cellulose (vol:vol); 1:3 pollen: cellulose (vol:vol), and cellulose. This study indicated that bees on the pollen diet were significantly greater than all other diluted diets in measurements of hypopharyngeal gland protein content, lipid content, and mass with significantly less consumption. However, mandibular gland protein content of bees on the pollen diet was significantly greater only from pure cellulose.

Thesis (M.S.)--University of Michigan, 1989.

Thesis (M.S.)--University of Michigan, 1975.

Thesis (M.S.)--University of Michigan, 1979.

Submitted by JUAN FRANCISCO MARISCAL MUÑOZ (francisco.mariscal@unesp.br) on 2018-10-10T01:32:58Z No. of bitstreams: 1 Dissertacao Juan170417.pdf: 1046589 bytes, checksum: 4e63f8ee0fe07828ecaa2ba1110e6a84 (MD5) / Approved for entry into archive by Marley Cristina Chiusoli Montagnoli (marley@foar.unesp.br) on 2018-10-15T18:22:58Z (GMT) No. of bitstreams: 1 mariscalmuñoz_jf_me_arafor_int.pdf.pdf: 1046589 bytes, checksum: 4e63f8ee0fe07828ecaa2ba1110e6a84 (MD5) / Made available in DSpace on 2018-10-15T18:22:58Z (GMT). No. of bitstreams: 1 mariscalmuñoz_jf_me_arafor_int.pdf.pdf: 1046589 bytes, checksum: 4e63f8ee0fe07828ecaa2ba1110e6a84 (MD5) Previous issue date: 2017-01-17 / O objetivo do trabalho foi avaliar tridimensionalmente as mudanças dentárias após avanço mandibular com o aparelho de Herbst bandado em indivíduos classe II divisão 1, após surto de crescimento. A amostra deste trabalho constituiu-se de modelos ortodônticos pré (T1) e pós tratamento (T2) de 34 pacientes (21 indivíduos masculinos e 13 femininos, idade média 16,2) portadores de má oclusão de Classe II divisão 1, que receberam na média terapia de avanço mandibular durante 8 meses. Estes modelos de estudo foram digitalizados (R700, 3Shape®) em oclusão habitual e analisados tridimensionalmente através do software VistaDent®. Em função de objetivos específicos, dividiu-se o trabalho em dois estudos. O primeiro estudo foi desenvolvido com o intuito de detectar efeitos acontecidos após 8 meses de avanço mandibular com aparelho de Herbst bandando, sobre a Curva de Spee (CDS) mandibular, índice de irregularidade de Little e inclinação vestíbulo-lingual dos incisivos inferiores. A análise estatística foi realizada por meio do teste t de Student, com nível de significância de 5%, precedido do teste de Levene, para analisar a hipótese de igualdade das variâncias. Incremento na profundidade da CDS (média -1,47 mm, P <0,00005), aumento no índice de irregularidade (média-1,89 mm; P <0,00005), e foi encontrada uma diferente proclinação entre incisivos laterais (32: média, 3,01, P <0,05; 42: média, 3,83, P <0,005) e incisivos centrais mandibulares (31: média, 1,80°, P <0,05; 41: média, 2,43°, P <0,05). Resultados sugeriram uma mudança negativa clinicamente significativa na profundidade da CDS, incremento no índice de irregularidade e proclinação diferenciada dos incisivos inferiores, após 8 meses de terapia com aparelho de Herbst bandado. O segundo estudo teve como objetivo de avaliar os efeitos dentários transversais imediatos após 8 meses de avanço mandibular com aparelho de Herbst bandando, na distância intercaninos, interpré-molares e intermolares assim como a rotação dos primeiros molares maxilares e mandibulares. Comparação estatística das varáveis pré e pós-tratamento e dimorfismo de gênero foi feita através do teste t de Student com um nível de significância de 5% precedido do teste de Levene, para analisar a hipótese de igualdade das variâncias. Diferenças na homogeneidade de gênero dentro da amostra (T1) provocou a separação do grupo para avaliação individual (masculino/feminino) em algumas das variáveis estudadas. Incremento nas distâncias interpré-molares da maxila (15-25: média 1,66 mm; 14-24: média 1,36 mm), mudanças insignificantes nas distâncias intercaninos (Mandibular: média 0.02 P=947; Maxilar: média 0.36 mm; P =0,177), ausência de rotações nos molares e um leve incremento nas distâncias intermolares (maxilar: média 0,80 mm; mandibular: média 0,06 mm) foram os resultados mais relevantes do trabalho. Resultados sugeriram mudanças transversais significativas nas distâncias interpré-molares maxilares, intermolares maxilar e mandibular com ausência de rotações e uma estabilidade das distâncias intercaninos. / The aim of this study was to evaluated three-dimensional mandibular dental effects with a banded Herbst appliance on Class II division 1 individuals, post growth spurt. The sample of this work constituted with pre-treatment (T1) and post-treatment (T2) orthodontic models of 34 patients (21 male, 13 female, average of 16,2 years-old) with Class II division 1 malocclusion, who received a mandibular advanced therapy during 8 months, were digitalized (R700, 3Shape®) in habitual occlusion and three-dimensionally analyzed through VistaDent® software In function of specific objectives this investigation was divided in 2 different studies. The first one with the intention of detecting dental effects of mandibular advancement with a Banded Herbst appliance over the Curve of Spee during 8 months; irregularity index of Little and vestibular-lingual inclination of the mandibular incisors. Statistical analysis was done through the T student test, with a level of significance of 5%, preceded by the Levene test, to analyze the equality of variances. Increase in depth of CDS (average-1,47 mm, P <0,00005), as well as the index of irregularity (average- 1,89 mm; P <0,00005); a different proclination was found in between lateral incisors (32: average, -3,01, P <0,05; 42: average, -3,83, P <0,005) and mandibular central incisors (31: average, -1,80°, P <0,05; 41: average, -2,43°, P <0,05). (31: average: -1,80°, P <0,05; 41: average, -2,43°, P <0,05). The results reflected a clinically significant negative effect in CDS depth, increase in the index of irregularity and differentiated proclination of mandibular incisors, after an 8-month therapy with Herbst banded appliance. The objective of the second study was to evaluate the immediate transversal dental effects after 8 months of mandibular advancement with a banded Herbst appliance, on inter-canine, inter-premolar and inter-molar distance; as well as the rotation of the mandibular and maxillary first molars. The statistical comparison between pre-treatment and post-treatment variances and gender dimorphism was made through the Student t test, with a level of significance of 5%, preceded by the Levene test, to analyze the hypothesis of variances equality. Differences in gender homogeneity in the sample (T1) provoked a group separation, becoming an individual evolution (male/female) in some of the studied variables. Increase in maxillary inter-premolar distances (15-25: average 1,66 mm; 14-24: average 1,36 mm), insignificant statistical changes within inter-canine distances (Mandibular: average 0.02 P=947; Maxillary: average 0.36 mm; P =0,177), absence of rotation in molars and slight increase in inter-molar distances (maxillary: average 0,80 mm; mandibular: average 0,06 mm) were the most relevant increases in this research. The results suggested significant transversal changes in maxillary inter-premolar distances, maxillary and mandibular inter-molar rotation absence and instability of inter-canine distance.

Made available in DSpace on 2016-08-03T16:30:58Z (GMT). No. of bitstreams: 1 MARIANA HELENA SILVA CARVALHO.pdf: 1374377 bytes, checksum: d3acb9dc6dfb090205a23da802efddcb (MD5) Previous issue date: 2011-12-07 / The purpose of this study was to evaluate cephalometrically, the vertical facial skeletal pattern in subjects with natural normal occlusion and different malocclusions, correlation with the mandibular symphysis and evaluate sexual dimorphism. The sample consisted of 200 cephalometric radiographs divided in five groups based on occlusion type: group A, patients with natural normal occlusion and groups B, C, D and E, patients with malocclusions, each group being divided equally by sex and mean age between 13 and 16 years old. The sample was classified into three morphological patterns of vertical face, according to the facial height ration (FHR), proposed by SIRIWAT & JARABAK or Quotient Jarabak in: Hyperdivergent, Neutral and Hypodivergent. It was used the GoMe.VT variable, from VIGORITO analysis to assess the symphysis inclination and its correlation with the vertical facial patterns. After data collection and statistical tests evaluation; q-square test, "T" Student test and Pearson correlation, it was concluded that Hypodivergent was the most frequent in all patients studied, with 70%, and the greater frequency of this pattern was found in Class II malocclusion, division 2, with 87,5%, prevalence of some other existing standards in different classes of occlusions. We found a positive correlation between the inclination of the mandibular symphysis and Quotient Jarabak only for malocclusion Class I and Class III malocclusion. There was no significant statistical difference between the sexes and the morphology classification when the five groups were compared, however, when the groups were analyzed separately, significant differences were found between the sexes. / O propósito deste estudo foi avaliar cefalometricamente, o padrão esquelético vertical da face em indivíduos com oclusão normal natural e nas diferentes maloclusões e sua correlação com a sínfise mandibular, além de avaliar a presença de dimorfismo sexual. A amostra foi composta de 200 telerradiografias cefalométricas, divididas quanto ao tipo de oclusão, em cinco grupos: grupo A, com pacientes portadores de oclusão normal natural e grupos B, C, D e E, com pacientes portadores de maloclusões, sendo cada grupo, dividido igualmente quanto ao sexo e apresentando idade média entre 13 e 16 anos. A amostra foi classificada em 3 padrões morfológicos verticais da face, de acordo com o índice da altura facial (FHR), proposto por SIRIWAT & JARABAK ou Quociente de Jarabak, em: Hiperdivergente, Neutro e Hipodivergente. Foi utilizada a variável GoMe.VT, da análise de VIGORITO, para avaliar a inclinação da sínfise e sua correlação com os padrões verticais faciais. Após a coleta de dados e da avaliação dos testes estatísticos; qui-quadrado, teste t de Student e da correlação de Pearson, concluiu-se que, o padrão Hipodivergente em todos os pacientes estudados foi o mais frequente, com 70%, sendo que a maior frequência deste padrão foi encontrado na maloclusão Classe II, divisão 2, com 87.5%, existindo outras prevalências de alguns padrões em diferentes classes de oclusões. Foi encontrada uma correlação positiva entre a inclinação da sínfise mandibular e o quociente de Jarabak apenas para a maloclusão Classe I e maloclusão Classe III. Não houve diferença estatisticamente significante entre os sexos e a classificação da morfologia quando comparados os cinco grupos, porém, quando os grupos foram analisados separadamente, foram encontradas diferenças significantes entre os sexos.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Deslocamentos de côndilos e ramos acompanhando a cirurgia de avanço mandibular foram descritos, mas a influência destas mudanças na instabilidade pós-cirúrgica ainda é pouco conhecida. Limitações na avaliação quantitativa de deslocamentos cirúrgicos pelos métodos tradicionais podem ser superadas através da tomografia cone beam e ferramentas de imagens tridimensionais. O objetivo deste trabalho foi avaliar as mudanças nas posições de côndilos, ramos e mento após cirurgia isolada de avanço de mandíbula. Foram realizadas tomografias computadorizadas de feixe cônico (CBCT) antes da cirurgia (T1), 1 semana (T2) e 6 semanas após a cirurgia (T3) em 20 pacientes retrognatas com padrão normal ou horizontal (14 mulheres e 6 homens, idade média = 27,08 anos, variação de 13,9 a 53,7 anos) submetidos à osteotomia bilateral sagital do ramo para avanço mandibular, sete deles com mentoplastia como procedimento auxiliar. Modelos 3D computadorizados foram construídos e superpostos utilizando-se a base do crânio de T1 como referência. Para a superposição, utilizou-se um método automático que identifica e compara a escala de cinza dos voxels de duas estruturas tridimensionais, eliminando a necessidade de marcação de pontos anatômicos pelo operador. Após a combinação dos modelos das três fases, regiões anatômicas de interesse foram selecionadas, sendo analisadas separadamente. Distâncias entre as superfícies anatômicas foram computadas, no mesmo indivíduo, entre T1-T2, T2-T3 e T1-T3, exibindo as mudanças ocorridas com a cirurgia, após a remoção do splint cirúrgico, e a resultante total dos deslocamentos cirúrgicos, respectivamente. A navegação pelos modelos superpostos através dos métodos de visualização por mapas coloridos e semi-transparências permitiu a avaliação das direções de deslocamento das estruturas. Um deslocamento ântero-inferior do mento foi observado em todos os casos entre T1 e T2 (>4mm em 87,5%); entre T2 e T3 observou-se um movimento ântero-superior em 69% dos pacientes, e com algum componente posterior em 25% (<3mm). Entre T1-T3, observou-se um deslocamento ântero-inferior em 87,5% dos casos, e apenas anterior em 12,5% (>4mm em 80%). Considerando-se todas as direções de deslocamento, os côndilos apresentaram um movimento menor que 2mm em 77,5% (T1-T2) e 90% (T2-T3 e T1-T3) dos casos, enquanto os ramos deslocaram-se menos de 3mm em 72,5% (T1-T2) e menos de 2mm em 87,5% (T2-T3) e 82% (T1-T3) dos casos. Os côndilos apresentaram uma tendência de deslocamento látero-posterior com a cirurgia, e uma tendência oposta entre T2 e T3. Os ramos apresentaram tendência de deslocamento ínfero-latero-posterior com a cirurgia, mas súpero-medio-anterior entre T2 e T3. Entre T1-T3, as tendências foram médio-postero-superior nos côndilos e súpero-latero-anterior nos ramos. Importantes deslocamentos foram observados nos ramos e côndilos após o procedimento cirúrgico, mas as mudanças após a remoção do splint cirúrgico sugerem uma resposta adaptativa tendendo às posições pré-cirúrgicas. As mudanças no mento após seis semanas sugeriram adaptações aceitáveis na maioria dos casos. / Condyles and rami displacements following mandibular advancement surgery have been described, but these changes and bone remodeling/resorption influence on post-treatment instability are poorly understood at present. Cone beam computed tomography (CBCT) and 3D imaging tools can now overcome conventional methods limitations in assessing surgical displacements. The aim of this study was to assess surgery and short-term post-surgery changes in the position of the condyles, rami and chin with the superimposition of 3D cone-beam CT models. Pre-surgery (T1), 1 week post-surgery (T2), and 6 week post-surgery (T3) CBCT scans were acquired for 20 retrognathic patients (14 females and 6 males, mean age = 27.08 years, range = 13.9-53.7 years) with short or normal face height who underwent a BSSO mandibular advancement. Seven patients also received a genioplasty as an adjunctive procedure. 3D models were built and superimposed through a fully automated voxel-wise method using the cranial base of the pre-surgery scan as reference. After combining the 3 models, anatomic regions of the chin, right and left condyle and ramus were selected and analyzed separately. Within-subject surface distances between T1-T2, T2-T3, and T1-T3 were computed, showing changes with surgery, after splint removal, and the total movement resultant, respectively. Color-coded maps and semi-transparent display of overlaid structures allowed the evaluation of displacement directions. After an antero-inferior chin displacement with surgery in all the cases (>4mm in 87.5%), 25% of the patients showed some kind of posterior movement (< 3mm), and 69% showed an antero-superior movement after splint removal. Comparing T1-T3, an antero-inferior (87.5% of the cases) or only inferior (12.5%) displacement was observed (>4mm in 80%). Considering all directions of displacement, the surface distance differences for the condyles and rami were small: 77.5% of the condyles moved <2mm with surgery (T1-T2), and 90% moved <2mm in the short-term (T2-T3) and in the total evaluation (T1-T3), while the rami showed a <3mm change with surgery in 72.5% of the cases, and a <2mm change in 87.5% (T2-T3) and in 82% (T1-T3). The condyles tended to move latero-posteriorly with surgery compared to a medio-anterior movement between T2-T3. The rami exhibited outward movements with surgery (infero-latero-posterior) and supero-medio-anterior displacements from T2-T3. The displacement tendencies between T1-T3 were medio-postero-superior in the condyles, and supero-latero-anterior in the rami. Expected displacements with surgery were observed and post-surgery changes suggested a short-term adaptive response toward recovery of condyle and ramus displacements. The changes on the chin following splint removal suggested an acceptable adaptation.