Child abuse is a serious public health problem and affects the victims' physical and mental health and development. The aims of this study were two-fold: to assess the attitudes and perceptions of dentists regarding child abuse, and to investigate professional characteristics associated with the identification of suspected child abuse. A questionnaire was sent to the 276 dentists of Pelotas, RS, Brazil, and 187 (68.0%) were returned. Demographic characteristics and profiles of the dentists, and information about their knowledge and attitudes regarding child abuse were collected. Descriptive analysis was performed, and associations were tested by chi-square and Fisher's exact tests. From all dentists surveyed, 123 (71.9%) reported providing treatment for children. Most dentists believed they could detect cases of child abuse (78.7%), but 85.7% had never suspected it. Among those who did suspect, 76.0% did not report the cases to authorities. No differences were observed between sexes, years of graduation, types of licenses, and the frequency at which children were treated. A higher proportion of dentists working at university had suspected child abuse. Even though dentists considered themselves able to identify suspicious cases, only a small percentage reported those suspicions, indicating a lack of awareness by these professionals in the adoption of protective measures for victims of aggression. It is necessary that dental professionals receive interdisciplinary training to enhance their ability to care for and protect children.

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This cross-sectional study evaluated the prevalence of dental fear and associated factors in schoolchildren aged 8 to 12 years old, in Pelotas, southern Brazil. Schoolchildren enrolled in 20 public and private schools were selected using a multi-stage sample design. Sociodemographic characteristics, children's dental visit and oral hygiene habits were assessed by questionnaires. The Dental Anxiety Question was used to measure dental fear prevalence. Children's clinical examination evaluated presence of dental caries (DMFT/dmft index) and gingival bleeding. Data were analyzed using Poisson regression with robust variance (prevalence ratio; 95% confidence interval). One thousand two hundred and two children were included. Dental fear prevalence was 24.6%. After the adjustment, girls [PR=1.71 (CI 95%: 1.31-2.22)], children from poorer families [PR=1.96 (CI 95%: 1.36-2.83)], those who had decayed teeth (D/d index>0)[PR=1.32 (CI 95%: 1.01-1.72), and who had never been at the dentist [PR=1.85 (CI 95%: 1.42-2.41) remained significantly associated with dental fear. The prevalence of dental fear indicates that it is a common problem among schoolchildren. Early dental care and dental caries prevention are important factors to prevent dental fear.

IntroduçãoCistos odontogênicos são definidos como cistos que surgem a partir do epitélio odontogênico e ocorrem nas regiões entre dentes e ossos maxilares. A proliferação e/ou degeneração do epitélio leva ao desenvolvimento dessa condição 1 . A frequência de cistos odontogênicos em crianças é relativamente baixa 2 . Um dos tipos mais comuns desses cistos são os cistos dentígeros, representando 24% de todas as lesões na população em geral 3 . Foi estimado que entre 4% a 9% dos cistos dentígeros ocorrem na primeira década de vida 4,5 . A patogênese desse cisto é desconhecida, mas, aparentemente, ele se desenvolve pelo acúmulo de líquido entre o epitélio reduzido do orgão do esmalte e a coroa do dente. O cisto de erupção é análogo ao cisto dentígero no tecido mole. Desenvolve-se como resultado da separação do folículo dentário que envolve a coroa de um dente em erupção 6 , provocando um bloqueio da microinfiltração regional que ocorre pela mucosa gengival e o dente não irrompido 7 . Clinicamente, os cistos de erupção apresentam-se como uma tumefação mole que pode conter apenas líquido (aparência translúcida azulada) ou também pigmento hemoglobínico (aparência de hematoma). Assim, se houver um traumatismo na superfície dos cistos, levando à presença de sangue no interior da

Resumo: O objetivo deste estudo foi avaliar o uso e a necessidade de prótese dentária entre os idosos brasileiros (65-74 anos) e verificar fatores associados. Foram analisados dados de 7.496 idosos participantes do Pesquisa Nacional de Saúde Bucal realizado em 2010 (SBBrasil, 2010). O uso e a necessidade de prótese dentária foram usados como desfechos. As variáveis de exposição incluíram características demográficas, socioeconômicas, de uso de serviços e de autopercepção da saúde bucal. Análises descritiva, bivariada e multivariada foram realizadas. A prevalência de uso e necessidade de prótese dentária foi de 78,2% e 68,7%, respectivamente. A Região Nordeste foi a que apresentou a menor prevalência de uso (71,3%) e a maior de necessidade prótese dentária (82,9%). As análises multivariadas por meio de regressão de Poisson revelaram maior uso de prótese dentária em mulheres, naqueles com 5 a 7 anos de estudos e nos que foram a serviço particular, e houve menor uso em indivíduos pretos e com necessidade autorreferida de prótese dentária. Menor necessidade de prótese dentária foi observada em mulheres e nos usuários de serviço particular, e maior naqueles que autorreferiram necessidade de prótese dentária. Diferenças regionais foram observadas na distribuição do uso e da necessidade de prótese dentária. Ainda assim, os achados revelaram altas prevalências de ambos os desfechos em todas as regiões. Variáveis socioeconômicas, demográficas e de uso de serviços influenciaram a ocorrência de uso e de necessidade de prótese dentária.

Objectives: The source of saliva inocula and the individual characteristics of saliva donors could affect the cariogenic activity of in vitro biofilms, but this could also be modulated by environmental determinants, such as the frequency of sugar consumption. Therefore, the aim of this study was to compare the cariogenicity of microcosm biofilm growths from the saliva of caries-free (CF) children, children with early childhood caries (ECC) and with severe ECC (S-ECC), under regular sucrose exposure. Methods: Microcosm plaque biofilms were initiated from the saliva of CF, ECC and S-ECC children. Biofilms were grown in 24-well microplates on bovine enamel discs for up to 10 days in artificial saliva, which was replaced daily. Growth conditions comprised cariogenic challenge (artificial saliva supplemented with 1% sucrose 6 h/day) or no cariogenic challenge. Daily pH was obtained from the artificial saliva, and after the experimental period, the biofilm formed on the enamel discs was collected for microbiological analyses. Mineral loss in enamel discs was estimated by percentage of surface hardness change. Results: Overall, no statistically significant differences were found among saliva sources (p > 0.05). Streptococcus mutans and lactobacilli counts increased in the biofilms grown under cariogenic challenge (p < 0.05), while a substantial decrease in the artificial saliva pH was detected under the same condition (p < 0.001). Higher demineralization (p < 0.001) was observed under sucrose exposure regardless of caries experience of children. Conclusions: While the sucrose exposure determined the cariogenicity of the biofilms, the caries experience of children who provided the inocula did not affect mineral loss associated with these biofilms.

Aim: To investigate the relationship between maternal depression and childhood caries in a cohort of adolescent mothers. Methods: This cross-sectional study nested in a cohort evaluated a sample of 538 mother/child dyads. When the children were 24-36 months of age, data regarding oral health from children and mothers were collected by clinical dental examination. A mother's major depressive disorder was assessed by using the Mini International Neuropsychiatric Interview (MINI [Plus]), at the current moment. Independent variables were obtained by using questionnaires. The outcome on dental caries experience was dichotomized by using 2 cut points: dmfs ≥1 and dmfs ≥3. Poisson regression analysis, using a hierarchical approach, was applied to assess the association between major depressive disorder in mothers with and those without caries experience and the outcome. Results: The prevalence of dental caries in children was 15.1% (n = 82). The mean dmfs index was 1.12 (SD = 3.72). The prevalence of major depressive disorder was 32.6% (n = 168). An interaction between caries status and depressive disorder was found, and after adjusted analysis, children from mothers with major depressive disorder with negative caries experience presented a higher caries prevalence (prevalence ratio 4.00, 95% confidence interval 1.29-12.41). Conclusion: Our findings suggest that maternal psychiatric disorders could have a negative impact on children's oral health.

Microcosm biofilms formed in microplates have demonstrated complex community dynamics similar to natural dental biofilm. No simplified microcosm models to evaluate enamel demineralization and dose-response effect to anticariogenic therapies have yet been established, thus this study was designed to develop a pre-clinical model fulfilling this purpose. Experiments were carried out to establish the time of biofilm formation and the sucrose concentration and exposure regimen. Biofilms were initiated from saliva and grown for up to 10 days on bovine enamel discs in 24-well plates, with a saliva analogue medium. Data were collected as pH readings and the percentage enamel surface hardness change. A dose-response evaluation was performed with chlorhexidine, which significantly affected the pH and mineral loss. Overall, the established model parameters, 5 days of biofilm growth with intermittent 1% sucrose exposure of 6 h per day, was suitable as a pre-clinical model for enamel demineralization and dose-response studies.