ObjectiveThis study evaluated the influence of light sources and immersion media on the color stability of a nanofilled composite resin.Material and MethodsConventional halogen, high-power-density halogen and high-power-density light-emitting diode (LED) units were used. There were 4 immersion media: coffee, tea, Coke® and artificial saliva. A total of 180 specimens (10 mm x 2 mm) were prepared, immersed in artificial saliva for 24 h at 37±1ºC, and had their initial color measured with a spectrophotometer according to the CIELab system. Then, the specimens were immersed in the 4 media during 60 days. Data from the color change and luminosity were collected and subjected to statistical analysis by the Kruskall-Wallis test (p<0.05). For immersion time, the data were subjected to two-way ANOVA test and Fisher's test (p<0.05).ResultsHigh-power-density LED (∆E=1.91) promoted similar color stability of the composite resin to that of the tested halogen curing units (Jet Lite 4000 plus - ∆E=2.05; XL 3000 - ∆E=2.28). Coffee (∆E=8.40; ∆L=-5.21) showed the highest influence on color stability of the studied composite resin.ConclusionThere was no significant difference in color stability regardless of the light sources, and coffee was the immersion medium that promoted the highest color changes on the tested composite resin.

O presente estudo teve por objetivo investigar a epidemiologia do câncer bucal no Brasil, por meio da revisão de literatura publicada nos últimos anos. Com isso, pretendeu-se descrever o perfil dos pacientes diagnosticados e susceptíveis ao câncer bucal, e ressaltar a importância da prevenção e diagnóstico precoce das lesões suspeitas. Observou-se que o perfil epidemiológico dos indivíduos mais acometidos pelo câncer de boca é caracterizado por homens, brancos, na faixa etária entre 50 e 70 anos de idade, trabalhadores expostos ao sol, usuários crônicos de tabaco, álcool ou a associação destes; os indivíduos de maior risco podem ainda apresentar trauma crônico devido ao uso de prótese; a localização da lesão é, principalmente, no dorso da língua e no lábio inferior. Considerando o câncer bucal como um problema de saúde pública, maiores esforços devem ser despendidos para a prevenção e combate dessa doença na população.

Aim: To estimate the reliability and validity of the Dental Anxiety Scale (DAS) and identify the prevalence and the effect of the socio-demographic characteristics of dental anxiety, in a sample of 212 adults. Methods: The psychometric sensitivity of the scale was assessed. A confirmatory factor analysis was performed, and the convergent validity and internal consistency were determined. The prevalence of anxiety was estimated, and the effect of socio-demographic variables on anxiety was assessed using structural equation modelling. Results: The participants' mean age was 33.5 (SD = 15.6) years, and 62.3% were female. There was an adequate factorial adjustment of the scale in this sample. The convergent validity and internal consistency were adequate in the one-factor model. Regarding two-factor model, there was a high correlation (r) among the factors, which jeopardized the discriminant validity. A total of 47.6% of the participants (IC 95% = 40.9 -54.4) presented low levels of anxiety, 32.5% (IC 95% = 26.2 -38.9) moderate levels, and 12.3% (IC 95% = 7.8 -16.7) exacerbated levels. There was a non-significant effect of gender, age and education on the anxiety levels of this sample. Conclusion: We concluded that the one-factor model presented better psychometric qualities, that anxiety was highly prevalent and there was no significant effect of the demographic variables on anxiety, in this sample.

This study evaluated the influence of finishing and polishing procedures and different fluoride solutions on superficial morphology and chemistry of the nanofilled composite resin Supreme XT (3M) through the EDX analysis and SEM evaluation. Circular specimens (n = 30) of 10 mm diameter and 2 mm thickness were prepared, with half of the sample assays finished and polished with Super-Snap® sandpaper. The experimental groups were divided according to the presence or absence of finishing and polishing and solutions (artificial saliva, 0.05% of manipulated sodium fluoride solution, Fluordent Reach, Oral B, Fluorgard). Specimens were immersed in each respective solution for 1 min per day, during 60 days and stored in artificial saliva at 37 ± 1°C between immersion periods. Topography and chemical analysis was qualitative. It was observed that specimens submitted to finishing and polishing procedures had lower superficial degradation. Fluoride solutions promoted superficial alterations on specimens, being the highest degradation obtained with Fluordent Reach. It can be concluded that finishing and polishing procedures and the immersion media influence the superficial morphology of composite resin tested; the Fluordent Reach was the fluoride solution that most affected the material's surface.

Introdução: O estudo avalia o conhecimento sobre causas e sintomas da halitose de pacientes da Clínica de Odontologia do Curso de Graduação do Centro Universitário de Araraquara - UNIARA, bem como analisa a eficiência de folheto educativo na mudança de comportamento quanto à prevenção do mau hálito. Métodos: Para isso, um questionário pré-codificado, composto por questões sobre o tema foi aplicado em 2 momentos: antes e após 30 dias da realização do experimento. A amostra foi composta por 30 pacientes, divididos em 2 grupos: GA – controle (respondeu ao questionário); GB – respondeu ao questionário e recebeu o folheto para leitura e novamente respondeu ao questionário, passados 30 dias da aplicação do folheto. Os grupos foram comparados por meio da coleta dos dados e análise descritiva da distribuição de frequências. Resultados: Os resultados mostraram que, de maneira geral, o conhecimento sobre halitose se mostrou controverso em alguns aspectos, principalmente, em relação às causas e formas de prevenção; não foi observada melhora no conhecimento sobre halitose para o grupo que recebeu o folheto. Conclusão: Tanto os profissionais quanto a população devem ser mais bem orientados em relação aos fatores fisiológicos e patológicos da halitose para atuarem na prevenção de seus efeitos individuais e sociais.