Background: The objective this study was to investigate the influence of clinical conditions, socioeconomic status, home environment, subjective perceptions of parents and schoolchildren about general and oral health on schoolchildren's oral health-related quality of life (OHRQoL). Methods: A sample of 515 schoolchildren, aged 12 years was randomly selected by conglomerate analysis from public and private schools in the city of Juiz de Fora, Brazil. The schoolchildren were clinically examined for presence of caries lesions (DMFT and dmft index), dental trauma, enamel defects, periodontal status (presence/absence of bleeding), dental treatment and orthodontic treatment needs (DAI). The SiC index was calculated. The participants were asked to complete the Brazilian version of Child Perceptions Questionnaire (CPQ_11-14) and a questionnaire about home environment. Questions were asked about the presence of general diseases and children's self-perception of their general and oral health status. In addition, a questionnaire was sent to their parents inquiring about their socioeconomic status (family income, parents' education level, home ownership) and perceptions about the general and oral health of their school-aged children. The chi-square test was used for comparisons between proportions. Poisson's regression was used for multivariate analysis with adjustment for variances. Results: Univariate analysis revealed that school type, monthly family income, mother's education, family structure, number of siblings, use of cigarettes, alcohol and drugs in the family, parents' perception of oral health of schoolchildren, schoolchildren's self perception their general and oral health, orthodontic treatment needs were significantly associated with poor OHRQoL (p < 0.001). After adjusting for potential confounders, variables were included in a Multivariate Poisson regression. It was found that the variables children's self perception of their oral health status, monthly family income, gender, orthodontic treatment need, mother's education, number of siblings, and household overcrowding showed a strong negative effect on oral health-related quality of life. Conclusions: It was concluded that the clinical, socioeconomic and home environment factors evaluated exerted a negative impact on the oral health-related quality of life of schoolchildren, demonstrating the importance of health managers addressing all these factors when planning oral health promotion interventions for this population.

The aim of this study was to perform a follow-up evaluation of the Streptococcus mutans and Streptococcus sobrinus colonization profile of children's oral cavities, which included the pattern of vertical transmission from mother to child, genotypic diversity, and stability of the strains. The subjects were 16 mother-child pairs, who were monitored for 20 months. Samples of saliva, tongue dorsum, alveolar ridge mucosa, and dental plaque from the children were collected bimonthly. Saliva samples from the mothers were also collected. After isolation and identification, the arbitrarily primed PCR method was performed for the genotypic characterization of S. mutans (968 isolates) and S. sobrinus (111 isolates). At the time the strains were acquired, the children harbored one to four distinct genotypes of S. mutans and only one genotype of S. sobrinus . Although S. mutans prevalence and genotypic diversity were greater than those of S. sobrinus , the presence of matching genotypes of S. mutans and S. sobrinus was similar (in 81.25 and 83.33% of mother-child pairs, respectively), suggesting vertical transmission for both species. This longitudinal study showed an increase in genotypic diversity of S. mutans in the oral cavity during the follow-up period: most of the initially acquired genotypes persisted, normally those genotypes transmitted by the mother, and some were lost during follow-up; new strains were also acquired. In conclusion, S. mutans and S. sobrinus genotypes acquired from maternal or alternative sources may show effective persistence in the oral cavity and/or transitory detection in the children's mouths, reflecting the continuous development of oral microbiota in children.

The aim of this study was to evaluate in vitro the marginal microleakage of different materials used as pit-and-fissure sealants (Delton, Filtek Flow, Dyract Flow and Vitremer). Fifty-six extracted sound human third molars were randomly assigned to 4 groups (n=14). After sealant placement, the teeth were thermocycled (500 cycles; 5ºC, 37ºC and 55ºC), isolated, immersed in 2% buffered methylene blue dye for 4 h, included in acrylic resin and sectioned longitudinally in a buccolingual direction. The sections were analyzed for leakage using an stereomicroscope. A 4-criteria ranked scale was used to score dye penetration. All materials exhibited dye penetration to some extension and no statistically significant difference was observed among the groups (p>0.05). In conclusion, the findings of this study showed that a flowable composite resin, a flowable compomer and resin-modified glass ionomer placed on occlusal pits and fissures had similar marginal sealing as the unfilled self-cured resin-based sealant.

OBJETIVO: Analisar se variáveis clínicas, sociodemográficas e de acesso aos serviços odontológicos influenciam o impacto da saúde bucal nas atividades diárias de adolescentes, adultos e idosos. MÉTODOS: Estudo transversal com dados secundários da Pesquisa Estadual de Saúde Bucal (SB São Paulo 2015) realizada em 163 municípios de São Paulo. Participaram do inquérito 17.560 indivíduos de três grupos etários: adolescentes de 15–19 anos (n = 5.558), adultos de 35–44 anos (n = 6.051) e idosos de 65 anos ou mais (n = 5.951). A seleção foi feita por amostra probabilística por conglomerados em dois estágios. A variável desfecho foi o impacto da saúde bucal sobre as atividades diárias, avaliado pelo questionário Oral Impacts on Daily Performances, contendo questões sobre comer, falar, higiene bucal, relaxamento, prática esportiva, sorriso, estudo ou trabalho, contato social e sono. O Oral Impacts on Daily Performances foi dicotomizado em com e sem impacto. As variáveis independentes foram as sociodemográficas, clínicas e de acesso, divididas em três blocos. Realizou-se análise de regressão logística múltipla hierarquizada considerando o plano amostral complexo de conglomerados. Cada observação recebeu um peso específico, dependendo da localização que resultou em frequências ponderadas e ajustadas para o efeito do delineamento. RESULTADOS: A presença de impacto da saúde bucal foi constatada em 27,9% dos indivíduos. No bloco 1, o sexo feminino e o grupo étnico preto/pardo tiveram maior chance de impacto da saúde bucal na qualidade de vida, bem como os adultos e idosos em relação aos adolescentes. No bloco 2, a renda familiar até R$1.500 teve associação com a presença de impacto. No bloco 3, os indivíduos que relataram dor de dente, frequentaram o serviço público e procuraram tratamento odontológico tiveram maior chance de impacto. CONCLUSÕES: As variáveis sociodemográficas, clínica e de acesso ao serviço de saúde influenciam o impacto da saúde bucal nas atividades diárias de adolescentes, adultos e idosos.