Thèse (M.Sc.)--Université Laval, 2002. / Bibliogr.: f. 75-86. Publié aussi en version électronique.

Thesis (doctoral)--Goteborgs Universitet, 1974. / Includes bibliographical references (p. 36-40).

Orientador: Luiz Cesar de Moraes / Banca: Israel Chilvarquer / Banca: Guinara Scaf / Banca: Fernando Renó de Lima / Banca: Edmundo Medici Filho / Resumo: Este estudo constou da análise do ângulo nasolabial e sua divisão em superior e inferior, por uma linha paralela ao Plano de Frankfort passando pelo ponto subnasal. Foram utilizadas 120 radiografias cefalométricas norma lateral, em pacientes portadores de má-oclusão Classe II e Classe III de Angle, 60 de cada grupo, 30 do sexo feminino e 30 do sexo masculino, na faixa etária de 13 a 43 anos, com média de idade de 241,03±77,78 meses. Os resultados obtidos foram para o ângulo nasolabial média para toda amostra de 106,42°±9,87", sendo para Classe lI média de 109,37±9,10 e para Classe III de 103,48±9,79, no sexo masculino média de 107,02±10,32 e no sexo feminino de 105,83±9,44. O ângulo superior apresentou média para toda amostra de 22,092°±8,831°, sendo para Classe II a média de 26,48±8,68 e para a Classe III de 17,708±6,543, no sexo masculino média de 22,40±8,85 e no sexo feminino de 21,78±8,87. Para o ângulo inferior média de toda amostra de 84,429°±8,717°, sendo para Classe II média de 82,93±7,99 e para Classe III média de 85,93±9,21, no sexo masculino de 84,63±_9,21 1e no sexo feminino de 84,23±8,26. Conclui-se para o ângulo nasolabial e para o ângulo superior, os indivíduos Classe II diferem dos indivíduos da Classe III (Classe II maior que Classe III), com diferença estatisticamente significante; para os ângulos nasolabial e superior não houve diferença estatisticamente significante para sexo e interação entre sexo com má-oclusão; para o ângulo inferior não diferem estatisticamente os dados para má-oclusão, sexo e suas interações / Abstract: This study consisted of the analysis nasolabial angle and its division in superior and inferior angle, by a parallel line to the Frankfort Plane, pass on the point Subnasal. 120 cephalometric x-rays lateral norm were used, from patients bearers of Class II and Class llI of Angle occlusion, with 60 patient each group, 30 female and 30 male, age group from 13 to 43 years, with age average of 241,03+77,78 months. The results obtained were to the nasolabial angle the general average of 106,42'+9,87º being for the Class II the average of 109,37+9,10 and for the Class III of 103,48+9, 79, for male average of 107,02+ 10,32 and for female of 105,83+9,44. The superior angle presented average of 22,092°+8,831º, for Class II the average of 26,48+8,68 and for Class lIl of 17,708+6,543,for male average of 22,40+8,85 and for female of 21,78+8,87. For inferior angle avarage of 84,429º+8,717, for Class II average of 82,93+7,99 and for Class lIl average of 85,93+9,21, for male of 84,63+9,21 and for female of 84,23+8,26. It was concluded for nasolabial angle and for superior angle, the individuals Class II differ from individuals Class III (Class III larger than Class lII), with statistically significant difference; for nasolabial angle and for superior angle without estatistically significant difference for sex and interaction among sex with occlusion; for the inferior angle without estatistically signiflcant difference the data for occlusion, sex and their interactions / Doutor

Magister Chirurgiae Dentium (MChD) / Mixed denticentition space analysis forms a critical aspect of early orthodo However, the applicability of these methods in other ethnic groups has been varied and questionable. The aim of this study is to evaluate the accuracy of the Tanaka and Johnston (1974) and the Moyers (1988) methods in a Kenyan sample. Mesio-distal tooth widths of 131 sets of dental casts obtained from randomly selected patients (50 males; 81 females) attending Kenyatta National Hospital were measured. The mean sum of the four mandibular incisors was used to determine the sum of canine and the two premolars in one quadrant. The predicted values of the mesio-distal widths were statistically compared with their respective actual sum of the canine and premolars of the same quadrants. The results of paired t tests and scatterplots indicated that there were highly significant differences (p<0.003) between actual measurements (Σ 3, 4 & 5) and their accurate among the non-radiographic prediction methods in the mixed dentition analysis in the Kenyan sample. treatment. The two most widely used non-radiographic tooth size prediction methods were derived from populations of Northern European ancestry. predicted values from Moyers (1988) prediction method except at 85% and/or 95% confidence levels. However, Tanaka and Johnston (1974) failed to show any statistically significant differences for either sex and combined sexes at p<0.05. The Tanaka and Johnston (1974) method was the most SAMPLE . / South Africa

Indiana University-Purdue University Indianapolis (IUPUI)

Indiana University-Purdue University Indianapolis (IUPUI) / This study was undertaken to determine normal changes which occur over a period of approximately ten years, in occlusions determined to be excellent in the mixed dentition stage of development. Skeletal patterns were compared graphically with Downs' sample of patients with excellent occlusion. A model analysis was used to compare various aspects comprising an excellent occlusion. The data derived from the model analysis was subjected to a statistical analysis. The results showed a more protrusive facial profile with increase in age. Also, there was a decrease in overjet, cuspid occlusion became slightly more Class II, and there was an increase in the presence and amount of crowding in the lower anterior teeth.

<p>Ambient Occlusion är en teknik för ambient ljussättning i digitala tredimensionella scener. Sådana scener ljussätts vanligtvis med en konstant mängd ambient ljus på samtliga ytor oberoende av ytornas vinkel och position gentemot olika ljuskällor i scenen. Detta ger ett platt och kalt intryck och utan vidare ljussättningstekniker är det ytterst svårt att urskönja detaljer i scenen. Ambient Occlusion åthjälper detta genom att reducera mängden ambient ljus i vissa delar av scenen. Ambient ljus är en enkel approximation av det reflekterade diffusa ljuset som antas nå nästan överallt i scenen. Genom att sänka det ambienta ljuset på punkter i scenen med tät eller täckande geometri så ger Ambient Occlusion ett intryck av att det sekundära diffusa ljuset ej når dessa platser. Pappret undersöker en äldre variant av Ambient Occlusion där mängden ambient ljus beräknas statiskt för en scen och sparas i texturer. Vidare undersöks nyare metoder där mängden ambient ljus beräknas dynamiskt på den renderade scenen i Pixel Shaders. Det senare tillvägagångssättet kallas Image Based Ambient Occlusion eller Screen Space Ambient Occlusion. Detta nya tillvägagångssätt jämförs mot den traditionella angreppsvinkeln med förberäknade texturer. Teknikerna utvärderas och jämförs mot varandra i avseende på tids- och minneskomplexitet, enkelhet och visuellt resultat utöver specifika egenskaper för de enskilda teknikerna. Arbetets resultat beskrivs i slutet av rapporten. I resultatet presenteras hur shaderteknikerna pga sina brister inte är applicerbara i alla scener.</p>

Ambient Occlusion är en teknik för ambient ljussättning i digitala tredimensionella scener. Sådana scener ljussätts vanligtvis med en konstant mängd ambient ljus på samtliga ytor oberoende av ytornas vinkel och position gentemot olika ljuskällor i scenen. Detta ger ett platt och kalt intryck och utan vidare ljussättningstekniker är det ytterst svårt att urskönja detaljer i scenen. Ambient Occlusion åthjälper detta genom att reducera mängden ambient ljus i vissa delar av scenen. Ambient ljus är en enkel approximation av det reflekterade diffusa ljuset som antas nå nästan överallt i scenen. Genom att sänka det ambienta ljuset på punkter i scenen med tät eller täckande geometri så ger Ambient Occlusion ett intryck av att det sekundära diffusa ljuset ej når dessa platser. Pappret undersöker en äldre variant av Ambient Occlusion där mängden ambient ljus beräknas statiskt för en scen och sparas i texturer. Vidare undersöks nyare metoder där mängden ambient ljus beräknas dynamiskt på den renderade scenen i Pixel Shaders. Det senare tillvägagångssättet kallas Image Based Ambient Occlusion eller Screen Space Ambient Occlusion. Detta nya tillvägagångssätt jämförs mot den traditionella angreppsvinkeln med förberäknade texturer. Teknikerna utvärderas och jämförs mot varandra i avseende på tids- och minneskomplexitet, enkelhet och visuellt resultat utöver specifika egenskaper för de enskilda teknikerna. Arbetets resultat beskrivs i slutet av rapporten. I resultatet presenteras hur shaderteknikerna pga sina brister inte är applicerbara i alla scener.

L’hypertension artérielle pulmonaire (HTAP) correspond à une augmentation des résistances artérielles pulmonaires, avec dans les formes les plus graves, une défaillance cardiaque droite. L’HTAP persistante du nouveau-né (HTAPP) est estimée à 2/100 naissances en France. L’adaptation cardio-respiratoire à la naissance implique le déclenchement simultané de plusieurs phénomènes non complètements compris. Notre travail avait pour but d’approfondir les connaissances sur la régulation pulmonaire périnatale et d’envisager de nouvelles possibilités thérapeutiques. Ainsi, nous avons mis en évidence in vivo une vasoconstriction pulmonaires chez le fœtus lors du tabagisme passif maternel, par blocage de la voie du NO. De même, nous avons pu montrer l’effet vasoconstricteur de l’apeline sur les artères pulmonaires de fœtus de brebis. Cet effet semble dose dépendant, inhibé par l’action des inhibiteurs calciques. Au contraire nous avons mis en évidence un effet vasodilatateur de la Déhydroépiandrostérone (DHEA). Cette action est médiée par la voie du NO. Parallèlement, nous avons montré que les acides gras poly insaturés &#969; 3 (AGPI&#969;3) entrainaient une vasodilatation pulmonaire, se prolongeant au delà d’une heure après l’arrêt de la perfusion. Cet effet est médié par l’ouverture des canaux potassiques et indépendant de la voie du NO. Parmi les AGPI&#969;3, nous avons établi que l’acide eicosapentaénoïque (EPA) qui induit cette réponse sans effet délétère sur la circulation systémique, ni l’oxygénation tissulaire. Enfin, nous avons établi que l’occlusion trachéale (OT) anténatale, traitement proposé pour certaine hypoplasie pulmonaire malformative, n’altère pas le débit pulmonaire, en favorisant la dilatation pulmonaire. Mais en cas d’OT prolongée, ces effets sont en partie masqués par les effets mécaniques de la pression intraluminale. Ainsi grâce à ces travaux, nous avons avancé dans la compréhension de l’adaptation de la circulation pulmonaire de la vie intra à la vie extra utérine. Ils permettent aussi de proposer de nouvelles thérapeutiques comme la supplémentation en AGPI&#969; 3 des femmes attendant un enfant à risque d’HTAP, et d’envisager de nouvelles voies de recherche thérapeutique comme la voie de l’apeline. / Persistent pulmonary hypertension (PPH) corresponds to an increase in pulmonary arterial resistance, with in the most severe forms, right heart failure. The persistent pulmonary hypertension of the newborn (PPHN) is estimated at 2/100 births in France. The cardiorespiratory adaptation at birth involves the simultaneous triggering of several phenomena including non completions. Our work aimed to increase knowledge on the regulation of perinatal pulmonary and consider new therapeutic possibilities. Thus, we have demonstrated in vivo pulmonary vasoconstriction in the fetus when maternal passive smoking, by blocking the NO pathway. Similarly, we demonstrated the vasoconstrictor effect of apelin infusion on the pulmonary arteries of fetal sheep. This effect appears dose dependent, inhibited by the action of calcium channel blockers. Instead we have shown a vasodilatory effect of dehydroepiandrosterone (DHEA). This action is mediated by the NO pathway. In parallel, we have shown that polyunsaturated fatty acids &#969; 3 (AGPI&#969;3) would cause pulmonary vasodilation, extending beyond an hour after stopping the infusion. This effect is mediated by the opening of potassium channels and independent of the NO pathway. Among AGPI&#969;3, we found that eicosapentaenoic acid (EPA) that induces this response without deleterious effect on the systemic circulation or tissue oxygenation. Finally, we established that the antenatal tracheal occlusion (TO), treatment proposed for some malformative pulmonary hypoplasia, does not alter pulmonary blood flow, promoting lung expansion. But in case of prolonged OT, these effects are partly masked by the mechanical effects of intraluminal pressure. And through this work, we have made progress in understanding the adaptation of the pulmonary circulation of the intra to extrauterine life. They also suggest new therapeutic, like supplementation as AGPI&#969; for women expecting a child at risk for PAH, and to consider new possibility of therapeutic research like the way of apelin.

No description available.