Aim To determine new energy parameters in micro-CT to allow appropriate segmentation of dental cementum from the surrounding structures. Methods For this pilot study, 11 single-rooted premolar teeth of young subjects aged 12 to 21 were selected. The teeth were scanned using high-energy microtomography (SkyScan 1173, Bruker) with varying acquisition energies (60, 70, and 80 kV). Each tooth was scanned three times. The images were reconstructed and analyzed by calculating the volume (mm3) of dental cementum in the cervical, middle, and apical root thirds among the different scanned stacks. The mean cementum volume in the root thirds was obtained, and correlated with the patient’s age, using Pearson’s correlation. Results The mean age of the patients in the sample was 16,73 years. For the 60kV energy, the cementum volumes were 1.01 mm3, 1.00 mm3, and 0.58 mm3, for the cervical, middle, and apical thirds, respectively. For 70kV, it was 1.08 mm3, 1.20 mm3, and 0.71 mm3 for the respective thirds. And for 80kV,0.55 mm3, 0.91 mm3, and 0.67 mm3 for the respective thirds. Conclusion An acquisition energy of 70kV resulted in the best segmentation and reproducibility of the results. Micro-CT can be a useful tool to non-destructively evaluate the dental cementum.

ABSTRACT Objective: To identify the clinical presentation of molar incisor hypomineralization (MIH) and hypomineralization of second primary molars (HSPM), including the distribution patterns of presence and severity of lesions, and to investigate the association of risk factors during the pre-and postnatal period with the presence of lesions. Material and Methods: This cross-sectional study was conducted with 160 individuals (72 with MIH/HSPM and 88 without lesions). The symmetry analysis regarding the presence and severity of MIH/HSPM was evaluated in pairs of homologous and opposite teeth. Sociodemographic and medical information was obtained using a detailed questionnaire. Data were analyzed by means of chi-square tests, Student’s t-test, and logistic regression (p<0.05). Results: Symmetry of presence and severity of hypomineralization lesions were present in homologous permanent teeth in 53.8% and 70.5% of cases, respectively, with statistically significant results only for the symmetrical pattern of severity of MIH lesions in the maxillary first molars (p=0.016) and mandibular first molars (p=0.02). Otherwise, a non-symmetric presence was statistically significant in homologous second primary molars (p=0.002) and opposite primary and permanent teeth (p≤0.001). An association between MIH/HSPM and systemic diseases during pregnancy and children medication was found (p<0.05); however, no evidence was found between these and MIH/HSPM severity. Conclusion: The symmetric pattern of severity of MIH lesions was statistically significant in permanent homologous teeth. Risk factors during pre and postnatal periods may be related to MIH/HSPM; however, these do not seem to interact with severity.

Abstract To assess the in vitro and in situ effect of experimental combined fluoride and calcium nanocomposite solutions on dental caries prevention. Nanocompound mesoporous silica (MS) with calcium (Ca) and sodium fluoride (NaF) - (MSCaNaF); MS with NaF (MSNaF), NaF solution (positive control), and deionized water (negative control - CG) were studied. The specimens (n=130) were submitted in vitro to a multispecies biofilm in the presence of 2% sucrose. After 24 h and 48 h, the culture medium pH, the percent of surface mineral loss (%SML), and lesion depth (ΔZ) were analyzed. In the in situ study, 10 volunteers participated in four phases of 7-days each. The products were applied on the specimens (n=240) before 20% sucrose solution drips. The polysaccharides (SEPS and IEPS), %SML and roughness (Sa) were evaluated. There was an in vitro decrease in pH values in 24h and 48h, compared to baseline. The MSCaNaF and MSNaF groups obtained lower values of %SML and ΔZ (p < 0.05) than CG and NaF after 24h and were similar to NaF after 48h (p<0.05). In situ results showed similar SEPS and IEPS among all groups after 48h. An after 7-days, the nanocomposites had similar values (p>0.05), while NaF was similar to CG (p>0.05). After 48h, the MSCaNaF and MSNaF reduced the %SML (p<0.05). After 7-days, both experimental nanocomposites were similar to NaF (p>0.05). Regarding Sa, MSCaNaF was better than NaF for both periods (p<0.05). The nanocomposites controlled the in vitro and in situ enamel demineralization, mainly in the initial periods.

ABSTRACT Objective: To associate caregivers' sense of coherence (SOC) and untreated caries with oral health status in children covered by a dental public health system. Material and Methods: A convenience sample of caregivers/children in Angra dos Reis, Brazil, was surveyed. Caregivers' SOC was evaluated using the 13-question version questionnaire. For both caregivers/children, sociodemographic information was acquired and caries experience was evaluated by DMFT/dmft and PUFA/pufa index. Statistical associations between children's untreated carious teeth and interest variables from the caregivers were evaluated by binary logistic regression assessed by generalized linear modeling. Results: A total of 233 pairs of caregivers-children were included. Children's untreated permanent and primary carious teeth represented 34.8% and 62.2% of the caries experience, respectively and at least one PUFA/pufa scored tooth was detected in 22.7% of them. Caregivers' DMFT was 13.5±7.0, while 33.6% scored on PUFA. A total of 62.1% of them presented untreated carious lesions. Results from the univariate model, correlating children's untreated caries and caregivers' attributes showed a statistical significance for SOC values (p<0.015), untreated decayed teeth (p<0.035), self-perception of oral health (p<0.022) and oral impact on daily performance (p<0.010). The multivariate logistic first model kept the statistical significance only for the caregiver's untreated decayed teeth. Conclusion: Caregivers' SOC and untreated carious teeth could be used as indicators of dental treatment needs in their offspring.

ABSTRACT Objective: To verify the association between prenatal care quality indicators and neonatal outcomes in maternity hospitals. Method: Hospital-based cross-sectional study in four high-risk referral maternity hospitals in the five health macro-regions enabled by the Stork Network in Ceará-Brazil. Between April 2017 and July 2018, 440 puerperal women were interviewed using simple probabilistic sampling and a formula with finite populations and stratification of each maternity hospital. The analysis involved Pearson's Chi-Square, Adjusted Residuals Analysis and Fisher's Exact. Results: There was an association between fewer consultations with prematurity and low birth weight. Delivery in the maternity hospital where the woman lived was associated with low birth weight and the need for ventilatory support. Conclusion: Prenatal care quality indicators influenced neonatal outcomes, which underlines the importance of ensuring access and quality of care as ways of reducing infant morbidity and mortality.

RESUMEN Objetivo: Verificar la asociación entre los indicadores de calidad de la atención prenatal y los resultados neonatales en las maternidades. Método: Estudio transversal de base hospitalaria en cuatro maternidades de referencia de alto riesgo en las cinco macrorregiones sanitarias autorizadas por la Red Cigüeña en Ceará-Brasil. Entre abril de 2017 y julio de 2018, se entrevistaron 440 puérperas mediante muestreo probabilístico simple y fórmula con poblaciones finitas y estratificación de cada maternidad. El análisis involucró Chi-Cuadrado de Pearson, Análisis de Residuos Ajustados y Exacto de Fisher. Resultados: Hubo asociación entre menor número de consultas con prematuridad y bajo peso al nacer. El parto en el hospital de maternidad donde vivía la mujer se asoció con el bajo peso al nacer y la necesidad de asistencia ventilatoria. Conclusión: Los indicadores de calidad de la atención prenatal influyeron en los resultados neonatales, lo que subraya la importancia de garantizar el acceso y la calidad de la atención como formas de reducir la morbimortalidad infantil.

RESUMO Objetivo: Verificar a associação entre os indicadores da qualidade do pré-natal e os desfechos neonatais em maternidades. Método: Estudo transversal de base hospitalar, em quatro maternidades referências para alto risco nas cinco macrorregiões de saúde habilitadas na Rede Cegonha no Ceará-Brasil. Realizou-se entre abril de 2017 e julho de 2018, entrevista com 440 puérperas, por amostragem probabilística simples e fórmula com populações finitas e estratificação de cada maternidade. A análise envolveu o Qui-Quadrado de Pearson, Análise de Resíduos Ajustados e Exato de Fisher. Resultados: Nota-se associação entre menor número de consultas com prematuridade e baixo peso ao nascer. Parto na maternidade de residência da mulher esteve associada com baixo peso ao nascer e necessidade de suporte ventilatório. Conclusão: Indicadores de qualidade do pré-natal influenciaram os desfechos neonatais, o que afirma a importância da garantia de acesso e qualidade da assistência como formas de reduzir a morbimortalidade infantil.

Objetivou-se analisar a coordenação das ações e serviços de saúde na assistência às pessoas que vivem com HIV/AIDS. Trata-se de um estudo seccional com 301 pessoas que vivem com HIV/AIDS. A análise foi feita por técnicas descritivas, analise de variância e comparação múltiplas de médias. Encontrou-se que a coordenação da assistência foi satisfatória (média = 3,69 e DP = 1,74). As pessoas que vivem com HIV/AIDS utilizavam outros serviços de saúde além dos Serviços de Assistência Especializada em HIV/AIDS – SAE (Pronto Atendimento: 67%; atenção básica: 43,2%; outros serviços especializados: 23,6%; serviços privados: 15%). Os cinco SAE apresentaram diferentes desempenhos, bem como distintos contextos e composições assistenciais, entretanto adequado manejo dos aspectos clínicos em detrimento dos sociais. O fornecimento da guia de referência foi tido como satisfatório, entretanto a guia de contrarreferência insatisfatório. Há necessidade de estratégias que favoreçam o desenvolvimento de ações compartilhadas e cooperadas dentro das equipes dos SAE e entre os diferentes serviços com o intuito de fortalecer a produção de cuidado resolutivo.

Este estudio tuvo como objetivo analizar la coordinación de acciones y servicios de salud en la asistencia a personas que viven con VIH/SIDA. Se trata de un estudio transversal con 301 personas que viven con VIH/SIDA. El análisis se realizó mediante técnicas descriptivas, análisis de varianza y comparación múltiple de medias. Se descubrió que la coordinación de la asistencia fue satisfactoria (media = 3,69 y SD = 1,74). Las personas que viven con el VIH/SIDA cuentan con otros servicios de salud más allá de los Servicios de Apoyo Especializados en VIH/SIDA con los siguientes porcentajes de uso: SAE (atención en urgencias) 67%; atención primaria 43,2%; servicios especializados 23,6%; y privados 15%). Los cinco SAE evidenciaron diferentes actuaciones que se traducen en diversas formas de cuidado, así como en la gestión adecuada del tratamiento clínico en su faceta social. La provisión de una guía de referencia se consideró satisfactoria, incluso frente a la lucha contra elementos insatisfactorios. Es necesario desarrollar estrategias que fomenten el impulso de acciones comunes y coordinadas dentro de los equipos de SAE y entre los diferentes servicios existentes, con el fin de fortalecer decisivamente la atención en la salud dentro de este ámbito.

The aim of this study was to analyze the coordination of health activities and services for persons living with AIDS. This was a cross-sectional study of 301 persons living with AIDS. The analysis used descriptive techniques, analysis of variance, and multiple comparisons of means. Coordination of care was found to be satisfactory (mean = 3.69 and SD = 1.74). Persons living with AIDS used other health services in addition to the Services for Specialized HIV/AIDS Care (67.0% emergency departments, 43.2% primary care, 23.6% other specialized services, 15% private services). The five specialized HIV/AIDS clinics showed different performance levels as well as distinct contexts and healthcare configurations, but adequate clinical management (comparatively better than management of social issues). Provision of the referral guide was considered satisfactory, but the counter-referral guide was found to be unsatisfactory. Strategies are needed to promote the development of shared and cooperative actions within the healthcare teams in the specialized HIV/AIDS clinics and between the different services in order to strengthen the provision of care with case-resolution capacity.

O objetivo do estudo foi investigar as características morfológicas do esmalte decíduo desmineralizado submetido à escovação com dentifrício fluoretado ou não fluoretado. Para isto, 32 blocos de esmalte foram separados em 4 grupos diferentes, contendo 8 elementos cada que foram imersos em saliva artificial por 15 dias: C = controle; E = atacado com gel de ácido fosfórico a 37% por 30 segundos; EB = atacado e escovado 3 vezes ao dia com dentifrício não fluoretado; EBF = atacado e escovado 3 vezes ao dia com dentifrício fluoretado. A escovação foi padronizada em 0,2 kgf e 15 movimentos de vai-e-vem foram executados em cada bloco. Após o período experimental, as amostras foram preparadas e examinadas no MEV. O grupo controle (C) apresentou lisura superficial e riscos causados pela escovação habitual; as amostras atacadas (E) apresentaram diferentes graus de desintegração superficial, porém o padrão de ataque ácido foi predominantemente a dissolução do tipo II. As superfícies escovadas apresentaram-se alisadas, com exposição das elevações correspondentes aos processos de Tomes e as depressões de esmalte interprismático. Partículas semelhantes a carbonato de cálcio foram encontradas nas partes mais protegidas das depressões. Não houve diferença quando os grupos foram escovados com dentifrício fluoretado (EBF) e dentifrício sem fluoreto (EB). Os resultados sugerem que a abrasão mecânica da escovação com dentifrício sobre o esmalte desmineralizado alisa a superfície rugosa causada pelo condicionamento ácido e que a presença do fluoreto não altera morfologicamente este padrão.

The aim of this study was to investigate, in vitro, the morphological characteristics of demineralized primary enamel subjected to brushing with a dentifrice with or without fluoride. In order to do so, 32 enamel blocks were divided in 4 different groups containing 8 blocks each. They were separately immersed in artificial saliva for 15 days. The experimental groups were: C - control; E - submitted to etching with 37% phosphoric acid gel (30 s); EB - submitted to etching and brushing 3 times a day with a non-fluoridated dentifrice; EBF = submitted to etching and brushing 3 times a day with a fluoridated dentifrice. The toothbrushing force was standardized at 0.2 kgf and 15 double strokes were performed on each block. After the experimental period, the samples were prepared and examined under SEM. The control group (C) showed a smooth surface, presenting scratches caused by habitual toothbrushing. The etched samples (E) exhibited different degrees of surface disintegration, but the pattern of acid etching was predominantly the type II dissolution. The brushed surfaces were smooth, with elevations which corresponded to the exposure of Tomes’ process pits and depressions which corresponded to interrod enamel. Particles resembling calcium carbonate were found in the most protected parts of the grooves. No morphological differences were observed between brushing with fluoridated (EBF) and non-fluoridated (EB) dentifrice. The results suggest that the mechanical abrasion caused by brushing demineralized enamel with dentifrice smoothes the rough etched surface, and the presence of fluoride does not cause morphological modifications in this pattern.