Mestrado em Odontologia (FO)
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Item Sorção, solubilidade e resistência flexural biaxial de uma resina composta em função do tipo de fonte de luz e técnicas de polimerização(Universidade Federal de Goiás, 2010-02-18) Carvalho, Andreia Assis; Lopes, Lawrence Gonzaga; http://lattes.cnpq.br/8698234314492960The use of composite resin (CR) in dental restorations is a common practice, however, in the oral environment, these polymers are subject to hygroscopic and hydrolytic effects, and strength of occlusion and mastication. This study aimed to evaluate in vitro the influence of different light sources, energy densities and polymerization techniques on sorption, solubility and biaxial flexural strength (RFB) of an RC. 240 specimens were fabricated (2mm x 8 MMO) RC (Esthet-X), shade A2. Two groups were obtained, depending on the instrument used: halogen lamp and light emitting diodes (LED) and subdivided according to the energy density (16 J/cm2 and 20 J/cm2), polymerization (conventional pulse I stopped and interrupted pulse II) and type of permeant (water and ethanol 75%). The methodology for the development of sorption and solubility test was based on ISO 4049:2000. Then the specimens were tested for RFB (ASTM F 394-78). We used ANOVA and Tukey test for parametric data and Kruskal-Wallis and Mann-Whitney test for data nãoparamétricos (? = 0.05). It was observed that in general there was no statistically significant differences when comparing the sources of light and the polymerization techniques (p> 0.05). Energy density of 16 J/cm2 and pulse interrupted technique II was possible to observe that the LED generated higher values of sorption and solubility of the halogen light and, in the conventional technique, lower RFB (p> 0.05 ). The ethanol produced higher values of sorption and solubility, and lower RFB compared with water. In general, light sources, energy densities and polymerization techniques did not influence the values of sorption, solubility and RFBItem Determinantes individuais e contextuais das alterações periodontais, má-oclusão e fluorose em escolares de 12 anos do município de Goiânia-GO(Universidade Federal de Goiás, 2013-12-20) Jordão, Lidia Moraes Ribeiro; Freire, Maria do Carmo Matias; http://lattes.cnpq.br/6056344372250078; Freire, Maria do Carmo Matias; Costa, Luciane Ribeiro de Rezende Sucasas da; Lemos, Cristiane Lopes SimãoInformation on social inequities in health is valuable when allocating resources for public services and formulating health strategies. Research is needed to deepen the understanding of the determinants that lead to inequities in oral health. This cross-sectional study aimed to analyze the association between individual and contextual factors and the prevalence of adverse periodontal condition, malocclusion and dental fluorosis among Brazilian 12- year-old schoolchildren. This study included data from an oral health survey carried out in 2010 in the city of Goiania, Brazil (n = 2,075) and secondary data obtained from the files of the local health authority. Data were collected through oral clinical examinations. For assessment of periodontal status two components of the Community Periodontal Index (CPI) were used: calculus and bleeding after probing. The Dental Aesthetic Index (DAI) was used to assess occlusion and the Dean Index to assess fluorosis. Dependent variables were presence of any periodontal condition, presence of malocclusion (DAI>25) and presence of fluorosis, analyzed separately. Independent individual variables were the children’s sex and color/race, and their mother’s level of schooling. Contextual variables were related to the schools (type and existence of toothbrushing program) and its geographic location in the health districts. Rao-Scott tests were performed for each of the three outcomes and multilevel analysis was performed for periodontal condition (Poisson regression) and malocclusion (Logistic regression). The results are presented in three original articles. The prevalence of calculus and/or bleeding was 7% and higher (P<0.05) in brown pupils, from public schools, and those located in health districts with intermediate socioeconomic indicators. The prevalence of malocclusion was 40.1%. Significantly higher rates of malocclusion were found among children from public schools, those located in less affluent health districts, and whose mothers had less years of education. The prevalence of fluorosis was 18.7%, predominantly of the very mild degree (11.2%). No significant association was found between fluorosis and the investigated variables. It was concluded that the inequalities in the distribution of adverse periodontal condition and malocclusion were determined by individual as well as contextual factors. Appropriate strategies addressed to the areas of socioeconomic deprivation are needed to reduce the disparities.Item Avaliação da influência da posição ântero-posterior dos lábios no grau de agradabilidade de pós-graduandos em ortodontia, endodontia e leigos(Universidade Federal de Goiás, 2013-02-25) TAVARES, Tiago Oliveira; Lenza, Marcos Augusto; http://lattes.cnpq.br/0734929669869820; Souza, João Batista deThe dental surgeon is a health professional responsible for the diagnosis and treatment of deformities affecting the stomatognathic system, therefore this professional must be able to recognize deviations from normality related to this area, even if such conditions are not specific to his specialty. This cross-sectional study aimed to assess the evaluation of postgraduate students of orthodontics (PO), postgraduate students of endodontics (PE), and laypersons (PL) on the level of facial attractiveness, with regard to the lower facial third and indications for treatment of deformities. We used a profile view photograph of the lower facial third of one male and one female White Brazilian, both with Angle Class I occlusion and Capelozza Pattern I face. Twenty-two images of the lower facial third were then digitally changed by 2.5 mm increments, in a total of 5.0 mm per image. We changed the upper and lower lips. Movements were anteroposterior only. The images were evaluated through a questionnaire by 90 participants. PO and PE groups evaluated the Class III profile as the least pleasant for both male and female images. PL group rated the male Class III profile and the female protusive jaws as the least aesthetically pleasant ones. PO, PE and PL goups rated the female Class I profile as the most pleasant. PO group rated the male Class I profile as the most pleasant and PE and PL groups rated the male Class II profile as the most aesthetically pleasant. PO, PE and PL groups were equally consistent regarding the level of attractiveness and the indication for treatment of deformities. PL group presented higher number of profiles with significant differences (P<0.05) in the level of facial attractiveness as discrepancy increases.