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Made available in DSpace on 2014-06-11T19:33:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-11-22Bitstream added on 2014-06-13T21:06:14Z : No. of bitstreams: 1 morais_jand_dr_arafo.pdf: 1381513 bytes, checksum: 405cbb9ca3b38e574bf4c8be4a12dfeb (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O Diabetes mellitus (DM) é uma alteração metabólica que pode comprometer a estabilidade do implante dentário devido a influência no tecido ósseo. O objetivo do estudo foi avaliar o efeito do Diabetes Mellitus e da insulinoterapia na osseointegração estabelecida ao redor de implantes instalados em tíbia de ratos. Foram utilizados 80 ratos Wistar, os quais foram divididos em 4 grupos: controle de 2 meses (C2m), controle de 4 meses (C4m), diabético (D) e insulínico (I). Os implantes de superfície lisa (2,2mmx4mm) foram instalados na tíbia do rato. Após um período de 2 meses para osseointegração, o grupo C2m foi sacrificado. A indução do DM foi realizada com dose única de estreptozotocina (40mg/Kg) pela veia peniana. Os ratos do grupo I receberam insulina subcutânea (8,5 U/dia) e os demais receberam solução salina (0,9%) pela mesma via. Os níveis da glicemia plasmática foram avaliados periodicamente pelo método enzimático da glicose-oxidase. Dois meses após a indução do DM, os grupos C4m, D e I foram sacrificados. A relação do tecido ósseo com o implante foi avaliada pelas análises: radiográfica (subtração radiográfica digital); bioquímica; histométrica e torque de remoção do implante. Os dados das análises radiográfica, bioquímica e histométrica foram comparados nos grupos pelo teste ANOVA, p>0,05. Os dados da análise do torque de remoção foram comparados nos grupos pelo teste Kruskal Wallis e Friedman, p>0,05. Os resultados mostraram que o grupo D apresentou níveis de glicemia plasmática acima de 300mg/dL e significativamente mais alto do que os grupos C4m e I após a indução do DM e esta condição sistêmica foi mantida até o final do experimento. / The Diabetes mellitus (DM) is a metabolic disease that can impair the dental implant establishment by bone tissue influence. The aim of this study was evaluate the effect of Diabetes Mellitus (DM) and insulin therapy on osseointegration around dental implants. Eighty implants were placed in 80 tibiae of adult rats. After a healing period of two months, the animals were divided into four groups of 20 animals each and subdivided into 10 rats for removal torque analysis and 10 rats for histometric analysis. Group C2m was sacrificed at this time. DM was induced using 40mg/kg Streptozotocin in a diabetic group (group D) and an insulinic group (group I). During two months, group I received subcutaneous doses of 8.5 UI insulin twice a day. Groups C4m (control of 4months) and D received only saline. After two months, the animals of groups D, I and C4m were sacrificed. The glycemic control of the animals was monitored during the experiment. The relation of bone with implant was evaluated by 18 radiographic (digital subtraction radiography), bioquimic, histometric and removal torque analysis. Data obtained with radiographic, bioquimic and histometric analysis were analyzed and compared by ANOVA test, p>0,05. Data obtained with removal torque analysis were analyzed and compared by Kruskal Wallis and Friedman tests, p>0,05. The glycemic controls were within normal range for groups A, C and I and higher for group D and maintained during experiment. Greater significant values of ALP serum and Ca urinary were determined in group D after DM induction. There was a significant difference in gray shade values in the subtraction image between groups D (123±9) and I (136±5) (p<0.05) on bone formation around the implant while there were no significant differences between control groups A (127±13) and C (133±10) and insulinic group.

Made available in DSpace on 2014-06-11T19:27:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2001-04-18Bitstream added on 2014-06-13T20:17:29Z : No. of bitstreams: 1 sakima_prt_me_arafo.pdf: 509492 bytes, checksum: 030daa33044ab67488b563f5e1934473 (MD5) / Desde o desenvolvimento do método cefalométrico radiológico por Broadbent, em 1931, estuda-se meios para se minimizar os efeitos de seus erros. Os erros de projeção foram descritos desde os primeiros trabalhos em cefalometria, porém seu conhecimento não é completo. Assim, o objetivo desse trabalho foi analisar os efeitos dos erros de projeção sobre os dados das análises cefalométricas de Steiner e de McNamara. Para isso, estudou-se uma amostra de vinte telerradiografias em norma lateral tomadas de pacientes sem problemas marcantes de simetria, e feitas em aparelhos radiográficos com especificações idênticas. Aplicou-se um tratamento de correção da ampliação da imagem radiográfica e outro para estimar as posições dos pontos médios de estruturas pares bilaterais e simétricas, e comparou-se esses valores com aqueles obtidos de forma convencional (sem correção dos erros de projeção). Nessas comparações utilizou-se teste t de Student para amostras correlatas. Observou-se que as grandezas cefalométricas angulares não sofreram influência da correção da ampliação da imagem; as grandezas lineares sofreram aumento na mesma proporção do grau de ampliação da imagem radiográfica; e os diferentes tratamentos dados a pontos bilaterais trouxeram resultados diferentes. Concluiu-se que a influência dos erros de projeção sobre as grandezas cefalométricas foi significante. / Since Broadbent introduced cephalometric radiology method, in 1931, means are studied for minimizing its errors and effects. Projection errors are discussed since the first studies in cephalometry, but their consequences are not thoroughly understood. The object of this research work is to analyze projection errors effects on linear and angular measurements from Steiner and McNamara cephalograms. A sample of twenty lateral radiographs from patients with no symmetry problem was studied; each radiograph was taken on radiographic systems with identical specifications. Two treatments were analyzed: one for magnification correction and other to minimize distortion effects on symmetric anatomical structures. These treatments brought values that were compared to those obtained in a conventional way (with no correction for projection errors). These statistical comparisons were performed by Student's t test for paired samples. The following observations were found: angular measurements were not influenced by magnification correction; linear measurements were increased in the same proportion as the magnification factor for that radiographic system; and, results were influenced by the way bilateral points were handled. This research work conclusion was that changes from the correction of projection errors were significant.

Made available in DSpace on 2014-06-11T19:23:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-10-26Bitstream added on 2014-06-13T19:50:44Z : No. of bitstreams: 1 pafaro_v_me_jabo.pdf: 1318574 bytes, checksum: 4f5b03311616de898dd60523637887a1 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / As medidas dos diametros da pelve, obtidas diretamente sobre o filme radiografico, sao conhecidas como pelvimetria radiografica. Essa tecnica, que possibilita determinar o padrao pelvimetrico para cada raca, serve como subsidio para metodos profilaticos contra complicacoes que possam ocorrer durante o parto, alem de permitir a classificacao anatomica e obstetrica da pelve. Por meio da pelvimetria foram analisadas radiografias da pelve, na projecao ventrodorsal, de 250 femeas caninas adultas de diferentes racas, a fim de estabelecer as dimensoes pelvicas. Medias e desvios-padrao foram, respectivamente... / The measurements of the diameters of the pelvis, the study radiographic is acquaintance as a pelvimetry radiographic. That know-how makes the assignation by possible standard pelvimetric for each breed , serving as a dole about to prevention against complications than is to may be become of during the break, besides from provide categorization anatomic and obstetric from the pelvis. By pelvimetry have been evaluated radiography the pelvis at the ventrodorsal radiographs of 250 female canine adult of different breeds, for the purpose of establish the dimensions pelvics. The averages and deflections norm have been respectively: Breed Brasilian Mastif... (Complete abstract, click electronic access below)

Made available in DSpace on 2014-06-11T19:23:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-09-29Bitstream added on 2014-06-13T19:50:49Z : No. of bitstreams: 1 nepomuceno_ac_me_jabo.pdf: 1633955 bytes, checksum: 31d281852ab56f9aab61f1d437226b8b (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / A proposta inicial deste projeto de pesquisa constituiu-se em avaliar a hemiarcada superior direita de gatos domésticos por meio de técnicas radiográficas odontológicas do paralelismo, à semelhança do que é utilizada em seres humanos, empregando-se filmes intra-orais aos posicionadores de Han Shin. As imagens obtidas por esta metodologia foram correlacionadas com as técnicas radiográficas convencionais (extra-orais), com o intuito de se estabelecer vantagens ou desvantagens como praticidade, nitidez e facilidade para detectar possíveis afecções dentais e periodontais. Foram utilizados 30 gatos, sem raça definida, 17 machos e 13 fêmeas, faixa etária entre dois e três anos, criados e confinados em gatis do Centro de Manutenção de Animais do Departamento de Zootecnia da Universidade Federal de Lavras/MG. Com os animais sob anestesia geral, foram realizadas radiografias da hemiarcada superior direita, incluindo, de acordo com a técnica, três incisivos, canino, três pré-molares e molar em radiografias intra-orais e extra-orais. As imagens radiográficas foram analisadas e efetuaram-se comparações qualitativas entre pares intra-orais e convencionais dos mesmos animais. Para se estabelecer a técnica radiográfica dental mais bem adaptada, foram realizadas análises estatísticas por meio do Teste de McNemar (Qui-quadrado modificado). De acordo com esse teste, a técnica intra-oral mostrou ser superior a extra-oral (p≤0,05), não somente para achados referentes a espaço periodontal aumentado, canal radicular amplo e arredondamento de ápice, mas também para a avaliação mais bem detalhada de dentes caninos, pré-molares e molares em gatos / The aim of this research was to evaluate the right maxilla hemiarcade of cats through parallel dental radiographic techniques, similar to that used in humans, applying Han Shin intraoral film positioner. Images obtained by this method were correlated with conventional radiographic techniques (extraoral). The goal was to establish advantages and disadvantages such as practicality, sharpness and easiness to detect possible dental and periodontal diseases. Thirty mixed breed cats were evaluated, 17 males and 13 females, ages two to three years old, raised and confined in catteries in the Center of Rearing of Animals of Department of Zootecnia of Federal University of Lavras/MG. Radiographies of the right maxilla were taken with the animals under general anesthesia, and according to the technique, three incisors, canine, three premolars and molar teeth were included in the intraoral and extraoral images. The radiographic images were analyzed and qualitative comparison of pairs of intraoral and conventional images from the same animals were achieved. To establish the dental image procedures that was better adapted for cats, the McNemar Test (Modified Qui-Square) was used for statistical analysis. The intraoral technique was superior than the extraoral (p≤0,05), not only for findings relating to increased periodontal space, broad root canal and rounded apex, but also for a more detailed evaluation of canine, premolar and molar teeth in cats

Made available in DSpace on 2014-10-09T12:41:31Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:59:54Z (GMT). No. of bitstreams: 0 / Dissertação (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

Made available in DSpace on 2014-10-09T12:54:21Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:09:27Z (GMT). No. of bitstreams: 1 12752.pdf: 1446592 bytes, checksum: bbd9a40baa2d04acc21669d03e871456 (MD5) / Dissertação (Mestrado) / IPEN/D / Instituto de Pesquisas Energéticas e Nucleares - IPEN/CNEN-SP

Orientador: Júlio Carlos Canola / Banca: Fabrício Singaretti de Oliveira / Banca: Gilson Helio Toniollo / Resumo: As medidas dos diametros da pelve, obtidas diretamente sobre o filme radiografico, sao conhecidas como pelvimetria radiografica. Essa tecnica, que possibilita determinar o padrao pelvimetrico para cada raca, serve como subsidio para metodos profilaticos contra complicacoes que possam ocorrer durante o parto, alem de permitir a classificacao anatomica e obstetrica da pelve. Por meio da pelvimetria foram analisadas radiografias da pelve, na projecao ventrodorsal, de 250 femeas caninas adultas de diferentes racas, a fim de estabelecer as dimensoes pelvicas. Medias e desvios-padrao foram, respectivamente... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The measurements of the diameters of the pelvis, the study radiographic is acquaintance as a pelvimetry radiographic. That know-how makes the assignation by possible standard pelvimetric for each breed , serving as a dole about to prevention against complications than is to may be become of during the break, besides from provide categorization anatomic and obstetric from the pelvis. By pelvimetry have been evaluated radiography the pelvis at the ventrodorsal radiographs of 250 female canine adult of different breeds, for the purpose of establish the dimensions pelvics. The averages and deflections norm have been respectively: Breed Brasilian Mastif... (Complete abstract, click electronic access below) / Mestre

Thesis (MSc (Radiography))--Cape Peninsula University of Technology, 2018. / Background and objectives The issue of patient doses received during fluoroscopy procedures, raised concerns for the researcher, as there may have been probable past skin injuries or deterministic injuries that may not have been documented. Amongst the radiology staff, there was very little understanding of what the actual dose area product (DAP) value means in real terms of effective dose and entrance skin dose. The aims of the study were to: i) Measure the radiation doses received by the patient and determine a simple means of defining the DAP value to the radiographer in terms of the dose received by the patient. ii) Determine the effective dose, entrance skin dose and the relationship with the DAP value to assist with developing a conversion co-efficient for dose indicators. Method Direct radiation dose measurements can be obtained through DAP meters attached to the diagnostic equipment, but the DAP value is not an direct indication of the effective dose received by the patient. The DAP values captured from the DICOM header information for barium fluoroscopic procedures at a large tertiary was analysed and Diagnostic Reference levels (DRL) were determined for barium swallow, meal and enema procedures. The effective and skin doses were calculated by means of the Monte Carlo program. The results were compared to published values. The relationship between the entrance skin dose and the DAP value was determined and conversion factors were calculated. Results Correlation between the DAP and entrance skin dose and comparative 75th percentile threshold values were determined for barium swallow (BaS), barium meal (BaM) and barium enema (BaE) procedures. Effective to DAP conversation factors for BaS, BaM and BaE are 0.19, 0.26 and 0.60 respectively and 0.15, 0.11 and 0.14 for entrance skin to DAP. Conclusion The the research showed the relationship between the effective dose, entrance skin dose and DAP value and a simple, practical and applicable explanation of the DAP value by means of conversion factors.