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In 2020, the Brazilian federal government launched the "Prevent Brazil" program to incentivize cities to improve their performance across 7 health care indicators, including prenatal dental care. Our study examines the impact of this policy on the use of oral health care among pregnant women in Brazil. We used a series of cross-sectional data from the Brazilian Public Health System from 2018 to 2023. We linked publicly available data from the Brazilian Ministry of Health and the Brazilian Institute of Geography and Statistics. Our outcome was the proportion of pregnant women receiving prenatal care who had at least 1 dental visit during the past year. Covariates included city-level socioeconomic (income and literacy), demographic (gender, race, and urban areas), and workforce variables (number of dentists working in the public health system per city/year). We estimated the impact of the policy on prenatal dental visits nationwide and stratified by geographic region using interrupted time-series analysis. Our analyses included 99.9% of all Brazilian cities (n = 5,562). The use of oral health care among pregnant women increased from 15% in 2018 to 69% in 2023. Adjusted estimates show that, after initiation of the Prevent Brazil, dental care use among pregnant women increased nationally at a rate of 4.6 percentage points per 4-mo period (95% confidence interval [CI] 4.5; 4.7). The policy's largest impact was in the North and Northeast regions, which have the lowest socioeconomic profiles (adjusted time-series rate 5.7 [95% CI 5.3; 6.1] and 5.2 [5.0; 5.4] percent points, respectively). Our findings support the positive impact of the Prevent Brazil policy on prenatal dental care in Brazil. The policy was associated with a countrywide improvement in prenatal dental care use, with a greater impact in socioeconomically disadvantaged regions.

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Oral diseases are an important public health problem owing to their high prevalence and strong impact on people, particularly in disadvantaged populations. There is a strong relationship between the socioeconomic situation and the prevalence and severity of these diseases. Mexico is among the countries with a higher frequency range in oral diseases, highlighting dental caries, which affect more than 90% of the Mexican population. MATERIALS AND METHOD: A cross-sectional, descriptive, and observational study was carried out in 552 individuals who underwent a complete cariogenic clinical examination in different populations of the state of Yucatan. All individuals were evaluated after providing informed consent and with the consent of their legal guardians for those under legal age. We used the caries measurement methods described by the World Health Organization (WHO). Prevalence of caries, DMFT, and dft indexes were measured. Other aspects were also studied, such as oral habits and the use of public or private dental services. RESULTS: The prevalence of caries in permanent dentition was 84%. Moreover, it was found to be statistically related to the following variables: place of residence, socioeconomic level, gender, and level of education (p < 0.05). For primary teeth, the prevalence was 64% and there was no statistical relation with any of the variables studied (p > 0.05). Regarding the other aspects studied, more than 50% of the sample used private dental services. CONCLUSIONS: There is a high need for dental treatment in the population studied. It is necessary to develop prevention and treatment strategies considering the particularities of each population, driving collaborative projects to promote better oral health conditions in disadvantaged populations.

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The use of fluorides is essential in the prevention of dental caries, considered to be the main dental public health problem. The formulation and implementation of public health policies can vary from country to country, depending on multiple factors. This study aims to analyze the interaction model between the knowledge produced about the use of fluorides and its implementation through public policies in two South American countries until the period of constitutional reform in each country. A narrative review was conducted with a systematic search of scientific articles and normative devices regarding the use of fluorides in public health in each country during the period prior to the implementation of the right to health in the Constitution. In both countries, there was an intense interaction among governmental organizations, researchers, academic and professional leaders, and companies involved in sanitation and salt production. Fluoride use strategies in Brazil and Colombia after an initial stage of similar characteristics began to differ in terms of public policy options for systemic fluoride use. In Brazil, the option was to adjust the concentration of fluoride in the water, while in Colombia, the addition of fluoride to table salt was consolidated as a public policy.

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AIMS: This study aimed to identify the association between management and human resource factors with the performance of dental care provided to patients with special health care needs (SHCN) in secondary care in Brazil in the second cycle of the Program for Quality Improvement and Access to Dental Specialty Centers (PMAQ-CEO). METHODS AND RESULTS: This study is a secondary data analysis from the second cycle from PMAQ-CEO, which evaluated 1097 Dental Specialty Centers (DSCs), conducted in 2018. Seventeen independent variables taken from dentists' training, and dental team management characteristics were analyzed to assess their influence on the reported "Performance of care for SHCN patients". An estimated score was generated from their performance on 23 questions related to the physical and human structure and work processes in the oral health care of SHCN patients in the DSCs. Negative binomial regression model with values p ≤ 0.05 were considered significant. Data analysis included residual deviation to the degree of freedom and the chi-square test. The patient care performance score with SHCN increases significantly when the DSC has a manager (RR = 1.019; CI = 1.011-1.026) and goal monitoring and analysis (RR = 1.012; CI = 1.007-1.005). By contrast, the DSCs in which the dentist is a statutory public servant (RR = 0.998; CI = 0.997-1.000) and performs additional unhealthy or hazardous duties (RR = 0.998; CI = 0.996-0.999) are less likely to provide a higher quality care. CONCLUSION: The heterogeneity and low-performance scores for dental care provided to SHCN was identified in Brazilian health services. It was possible to verify that management and human resource factors of the DSCs were associated with the performance of dental care provided to SHCN patients.

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Este estudo visou identificar a associação entre a gestão e os fatores de recursos humanos com o desempenho dos cuidados odontológicos prestados a pacientes com necessidades especiais (PNE) na atenção secundária no Brasil no segundo ciclo do Programa de Melhoria da Qualidade e Acesso a Centros de Especialidades Odontológicas (PMAQ-CEO). Trata-se de uma análise de dados secundários do segundo ciclo do PMAQ-CEO, que avaliou 1.097 Centros de Especialidades Odontológicas (CEOs), realizado em 2018. Foram analisadas 17 variáveis independentes retiradas da formação de cirurgiões-dentistas e as características de gestão de equipes odontológicas para avaliar a sua influência descrito como "Desempenho dos cuidados aos PNE". Foi gerada uma pontuação estimada a partir do seu desempenho em 23 questões relacionadas com a estrutura física e humana e processos de trabalho nos cuidados de saúde bucal de PNE nos CEOs. Foi utilizado o modelo de regressão binomial negativo e valores de p≤0.05 foram considerados significativos. A análise da qualidade do modelo incluiu o desvio residual ao grau de liberdade e o teste do qui-quadrado. A pontuação do desempenho dos cuidados de saúde dos pacientes com PNE aumenta significativamente quando o CEO tem um gestor (RR=1,019; IC=1,011-1,026) e monitorização e análise de objetivos (RR=1.012; IC=1,007-1,005). Pelo contrário, os CEOs que o dentista é funcionário público estatutário (RR=0,998; IC=0,997-1,000) e que recebe adicional de insalubridade ou periculosidade (RR=0,998; IC=0,996-0,999) possui menor probabilidade de prestar cuidados de maior qualidade. A heterogeneidade e a baixa pontuação de desempenho nos cuidados dentários prestados à PNE foi identificada nos serviços de saúde brasileiros. Foi possível verificar que os fatores de gestão e recursos humanos dos CEOs foram associados ao desempenho dos cuidados em saúde bucal prestados aos PNE.

This study aimed to identify the association between management and human resource factors with the performance of dental care provided to patients with special health care needs (SHCN) in secondary care in Brazil in the second cycle of the Program for Quality Improvement and Access to Dental Specialty Centers (PMAQCEO). Secondary data analysis from the second cycle from PMAQ-CEO, which evaluated 1,097 Dental Specialty Centers (DSCs), conducted in 2018. Seventeen independent variables taken from dentists' training, and dental team management characteristics were analyzed to assess their influence on the reported "Performance of care for SHCN patients". An estimated score was generated from their performance on 23 questions related to the physical and human structure and work processes in the oral health care of SHCN patients in the DSCs. Negative binomial regression model with values p≤0.05 were considered significant. Data analysis included residual deviation to the degree of freedom and the chi-square test. The patient care performance score with SHCN increases significantly when the DSC has a manager (RR=1.019; CI=1.011-1.026) and goal monitoring and analysis (RR=1.012; CI=1.007-1.005). By contrast, the DSCs in which the dentist is a statutory public servant (RR=0.998; CI=0.997-1.000) and performs additional unhealthy or hazardous duties (RR=0.998; CI=0.996-0.999) are less likely to provide a higher quality care. The heterogeneity and low performance scores for dental care provided to SHCN was identified in Brazilian health services. It was possible to verify that management and human resource factors of the DSCs were associated with the performance of dental care provided to SHCN patients.

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OBJECTIVE: To explore through focus groups (FGs) the perceptions of dental practitioners (DPs) from different countries of the challenges of implementing coronavirus disease 2019 (COVID-19) related biosafety measures, especially personal protection equipment (PPE), during the COVID-19 pandemic period. METHODS: DPs from Colombia, Germany, the United Kingdom, and the United States were invited to participate in country-based FGs. These were facilitated by an experienced moderator who explored the factors that guided the implementation of COVID-19 related biosafety measures and PPE use. Data were analyzed through thematic analysis on the basis of categories defined by the researchers deductively and inductively. RESULTS: A total of 25 DPs participated in 3 FGs (Colombia:n = 8; United Kingdom: n = 7; United States: n = 9) and 1 in an in-depth interview (Germany). DPs described using several processes to judge which guidance document to adopt and which aspects of the guidance were important in their practice. These included making judgments concerning the views of any indemnity organization to which the DPs were responsible, the staff's views in the practice, and the views of patients. In the absence of a single overarching guidance document, DPs filtered the available information through several considerations to find a level of PPE that they deemed "implementable" in local practice. CONCLUSIONS: The findings suggest that the implementation of evidence-based practice is subject to modification through a lens of what is "feasible" in practice. KNOWLEDGE TRANSFER STATEMENT: Clinicians, educators, and policy makers can use the results of this study to understand the process through which guidance is transformed into implementable patient care pathways in the dental practice.

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Untreated dental caries is the most common disease globally and fluoride use at the population level is crucial for its control. To investigate the economic and political conditions under which the trajectory of population-based fluoride use has occurred is key for a more comprehensive view on its current and future challenges. The objective was to give a brief history and summarize the information on the use of fluorides at the population level in Brazil from 1952 to 2017 and to point to current and future challenges. A critical overview was undertaken based on country-level analyses comprising political and economic conditions. The analytical approach adopted a set of premises applicable to the study of capitalist democracies. Fluoride methods of systemic and topic use began to be employed in Brazilian public health programs in the 1950s and in a combined way from 1974. Differences in political and economic contexts were highlighted for four periods: the first interventions from 1952 to 1974, when the fluoridated water law was approved; the expansion after 1974 until 1988, when a new constitution was enacted; the following time until 2010; and the final period. From the 1980s to 2008, water fluoridation coverage increased progressively, consolidating as a major strategy of systemic use in spite of inequalities among territories. Activities aimed to promote access to topical fluoride use increased and maintained stability until 2014, when they dropped sharply. Regulation of fluoride dentifrice's quality remained insufficient. It was hypothesized that the strengthening of conservative liberalism and the increase in fiscal austerity observed in recent years might produce serious constraints on public investment and limit access to fluorides. To reduce inequities and promote benefits for all, including the most vulnerable groups, policies based on egalitarian and social justice theoretical perspectives are needed more than ever.

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Resumen: El cambio en el modelo asistencial odontológico en España ha supuesto la proliferación de grandes franquicias dentales o clínicas dentales low cost. Este tipo de establecimientos suelen realizar la captación de pacientes mediante agresivas campañas de publicidad, establecen financiaciones de los presupuestos directamente con entidades bancarias y rebajan los presupuestos inicialmente marcados. En los últimos años, la Comisión de Ética y Deontología del Ilustre Colegio Oficial de Odontólogos y Estomatólogos de Aragón ha comprobado un notable aumento de las reclamaciones de pacientes procedentes de este tipo de clínicas. Uno de los casos más llamativos ha sido el cierre de la franquicia iDental, que dejó a miles de personas sin terminar sus tratamientos odontológicos. Se pretende realizar una puesta al día de las repercusiones deontológicas que estas clínicas tienen en la deontología dental de la Comunidad Autónoma de Aragón.

Abstract: The change in deontological health care model in Spain has led to the proliferation of huge dental franquises or low cost dental clinics. This type of settings generally engages customers by aggressive advertising campaigns, establishing financing with banks and reducing the agreed initial budget. In the last years, the Ethical and Deontological Commission of the Official College of Dentists and Stomatologists of Aragon has noticed a significant increase of claims by patients attending this type of clinics. One of the most striking cases has been the closing of iDental, which led thousands of patients without finishing dental treatment. This study pretends updating the deontological repercussions that these clinics have in the Autonomous Community of Aragon.

Resumo: A mudança no modelo assistencial odontológico na Espanha implicou na proliferação de grandes franquias dentais ou clínicas dentais de baixo custo. Estes tipos de estabelecimentos habitualmente realizam a captação de pacientes mediante agressivas campanhas publicitárias, estabelecem financiamento dos orçamentos diretamente com instituições bancárias e abaixam os orçamentos inicialmente apresentados. Nos últimos anos, a Comissão de Ética e Deontologia do Ilustre Colégio Oficial de Odontólogos e Estomatólogos de Aragão comprovou um notável aumento de reclamações de pacientes procedentes deste tipo de clínica. Um dos casos mais chamativos foi o encerramento da franquia iDental, que deixou milhares de pessoas sem terminar seus tratamentos odontológicos. Se pretende realizar uma atualização das repercussões deontológicas que estas clínicas têm na deontologia dental da Comunidade Autônoma de Aragão.

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Background: The coronavirus disease 2019 (COVID-19) pandemic had quite an impact on dental health care. Concerns about the risk of SARS-CoV-2 transmission through contaminant fluids and droplet formation during several dental procedures highly impacted dental health care, drastically reducing the number of dental practices worldwide. To monitor SARS-CoV-2 contamination in dental clinics, a longitudinal study was carried out during the return of dental practice at university. Methods: Dental health care professionals [(DHCPs); teachers, undergraduate dental students, and dental assistants] and patients were screened for SARS-CoV-2 RNA in a dental school clinic environment from 11th January to 12th March 2021 (9 weeks). Serological testing was performed on DHCPs in two-time points. Additionally, samples with low Ct values were sequenced to identify the circulating SARS-CoV-2 variant and possible transmission clusters. Results: We found a low number of dental staff (5.8%), patients (0.9%), and environment sites (0.8%) positive for SARS-CoV-2. Most positive cases had asymptomatic to mild symptoms, and two asymptomatic DHCPs presented prolonged infection. In the first week after previous exposure to COVID-19, 16.2% of DHCPs had IgM or IgG antibodies against SARS-CoV-2, and 1/3 of them had undetected antibodies in the last weeks. The variant zeta (P.2) could be detected. No cross-infection was observed between participants. Conclusion: Our study suggests that dental practice can be safely executed when adequate control measures and biosafety protocols are applied. DHCP and patient testing, patient telemonitoring, proper use of personal protection equipment, and sanitization of surfaces are essential to avoid SARS-CoV-2 cross-infection in dental practice.

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This study systematically reviews the evidence of the association between life course social mobility and tooth loss among middle-aged and older people. PubMed, Scopus, Embase, and Web of Science were systematically searched in addition to gray literature and contact with the authors. Data on tooth loss were collated for a 4-category social mobility variable (persistently high, upward or downward mobility, and persistently low) for studies with data on socioeconomic status (SES) before age 12 y and after age 30 y. Several study characteristics were extracted to investigate heterogeneity in a random effect meta-analysis. A total of 1,384 studies were identified and assessed for eligibility by reading titles and abstracts; 21 original articles were included, of which 18 provided sufficient data for a meta-analysis with 40 analytical data sets from 26 countries. In comparison with individuals with persistently high social mobility, the pooled odds ratios (ORs) for the other categories were as follows: upwardly mobile, OR = 1.73 (95% CI, 1.53 to 1.95); downwardly mobile, OR = 2.52 (95% CI, 2.19 to 2.90); and persistently low, OR = 3.96 (95% CI, 3.13 to 5.03). A high degree of heterogeneity was found(I2 > 78%), and subgroup analysis was performed with 17 study-level characteristics; however, none could explain heterogeneity consistently in these 3 social mobility categories. SES in childhood and adulthood is associated with tooth loss, but the high degree of heterogeneity prevented us from forming a robust conclusion on whether upwardly or downwardly mobile SES may be more detrimental. The large variability in effect size among the studies suggests that contextual factors may play an important role in explaining the difference in the effects of low SES in different life stages (PROSPERO CRD42018092427).

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Objective: To explore factors associated with social discrimination against users of health services regarding dental aesthetic conditions. Methods: Based on a Brazilian National Survey, multivariate Poisson regressions with robust variance were used to explore the association of outcome discrimination related to different motivations in health services and exposure to sociodemographic and dental variables. Effect modification by complete prosthesis wearing was assessed. Results: Among the 60,200 people interviewed, 11.5% reported being discriminated against in health services. For women, a higher prevalence of discrimination was found among those in the age group of 30-44 years. For both sexes, discrimination was associated with black and brown skin color. Regarding dental characteristics, the higher the tooth loss was, the higher the prevalence of discrimination; however, complete prosthesis wearing presented as a protective factor. Social discrimination was the major motivation for reported discrimination and presented higher prevalence in edentulous individuals who did not wear prosthesis. Conclusion: Dental loss may lead to self-reported discrimination in health care services. The prevalence of discrimination increases when tooth loss increases, and the major reason associated is social discrimination.

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OBJECTIVE: This quali-quantitative study analysed the 100 most-cited papers in core dental public health (DPH) journals focusing on understanding international knowledge production. METHODS: The DPH journals were selected from titles and scopes at Web of Science Core Collection database up to March 2020. Further comparisons were performed at Scopus and Google Scholar databases. Some bibliometric parameters were extracted as follows: title, number of citations, citation density (number of citations per year), first author's country, year of publication, study design and subject. VOSviewer software was used to create graphical bibliometric maps. RESULTS: Papers were ranked by the total number of citations, which ranged from 104 to 1,019, and six papers were cited more than 400 times. Papers were published from 1974 to 2013, mainly in Community Dentistry and Oral Epidemiology. Most frequent study designs were cross-sectional (30%) and nonsystematic review (25%). Most papers were from Europe (54%) and North America (31%). First authors were predominantly from the United Kingdom (17%), United States of America (17%) and Canada (14%). VOSviewer map of co-authorship demonstrated the existence of clusters in the research collaboration. Although epidemiology was the most frequent subject (84%), health services research presented eight times higher citation density. CONCLUSIONS: Top 100 most-cited papers in core DPH journals were predominantly observational studies from Anglo-Saxon countries. Top 100 most-cited papers in core DPH journals tend to be cross-sectional studies carried out in the United States with highest citation in health services research. Locker D, Petersen PE and Sheiham A are a landmark for DPH field.

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ABSTRACT Introduction: The oral health of students from rural areas is a priority public health problem in Peru. Objective: To determine socioeconomic factors in relation to oral health in students from a rural Peruvian area. Methods: Descriptive cross-sectional observational study. The sample consisted of 604 students from a rural Peruvian area selected for convenience, meeting criteria of inclusion and exclusion, following ethical standards in scientific research. Socioeconomic factors were assessed using a structured questionnaire and the oral health using an epidemiological record with the indicators: DMFT index, Significant Caries Index (SiC), Simplified Oral Hygiene Index (OHI-S), Index of clinical consequences of untreated dental caries (PUFA). The evaluation was performed with natural light by calibrated observers. The data was analyzed in the program STATA 14 through frequency distribution tables and graphics. The relationship of each of the socioeconomic factors with the experience of dental caries was evaluated by the simple binary logistic regression tests. Results: The prevalence of dental caries was 85, 26 percent (DMFT = 6, 60 SiC=7, 23). The most frequent oral hygiene condition was regular, the prevalence of untreated tooth decay was 61.75 percent. Conclusions: The level of illiterate instruction, family responsibility and independent parental occupation showed a statistically significant association with their children's dental caries experience in a rural Peruvian area. (p < 0.001)(AU)

RESUMEN Introducción: La salud bucal de los estudiantes de zonas rurales es un problema prioritario de salud pública en el Perú. Objetivo: Determinar la relación entre factores socioeconómicos y salud bucal en estudiantes de una zona rural peruana. Métodos: Estudio observacional, descriptivo, de corte transversal. La muestra estuvo conformada por 604 estudiantes de una zona rural peruana, los que fueron seleccionados por conveniencia. Se evaluaron los factores socioeconómicos mediante un cuestionario estructurado y la salud bucal a través de una ficha epidemiológica con los indicadores: Índice CPOD, índice de significancia de caries dental (SIC), índice de higiene oral simplificado (IHO-S), índice de consecuencias clínicas de caries no tratadas (PUFA), la evaluación fue realizada con luz natural por observadores calibrados. Los datos se analizaron en el programa STATA v.14 mediante tablas de distribución de frecuencias y figuras. La relación de cada uno de los factores socioeconómicos con la experiencia de la caries dental se evaluó mediante pruebas de regresión logística binarias simples. Resultados: La prevalencia de caries dental fue de 85,26 por ciento (CPOD = 6,60, SIC = 7,23) y la prevalencia de caries dental no tratada fue 61,75 por ciento . La condición de higiene oral más frecuente fue regular. Conclusiones: El nivel de instrucción analfabeto, la responsabilidad familiar y la ocupación independiente de los padres mostraron asociación estadísticamente significativa con la experiencia de caries dental de sus hijos en un área rural peruana (p < 0,001)(AU)

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Bias in longitudinal studies have been well described and the longer the follow-up, the higher the proportion of drop-outs. Here, I present some key issues related to selection bias, time-varying confounders, solutions to bias and challenges in longitudinal studies in dental research. Selection bias creates distortions in measures of disease frequency or association due to losses of follow-up or use of specific population groups. It is shown that even if losses are not associated with baseline values, measures such as odds ratios may be seriously distorted. Such problems can be understood by directed acyclic graphs, identifying the collider bias, or by missing data theory. Time-varying confounding occurs when an exposure varies over time and is affected by past exposure of other time-varying covariates, creating a complex scenario to adjustment in multiple regression. Under some assumptions, missing information may be informed by other variables in the dataset, and techniques such as multiple imputation or inverse probability weighting can be helpful, but the best solution is to prevent losses of follow-up as much as possible. Finally, I present challenges for longitudinal studies that use electronic health records and the need to incorporate area-based contextual measures. The first allows linkage of dental records with other information systems to create longitudinal (big) data. The second allows evaluation longitudinally of the effect of contextual factors, including social and health policies, on oral health.

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OBJECTIVE: This study evaluated systemic and periodontal conditions and their association with quality of life in women in the third trimester of pregnancy, assisted by the Brazilian public health-care system, with excessive and normal weight. METHODS: Fifty pregnant women were allocated into two groups according to their pre-pregnancy body mass index (BMI): excessive (GE; n = 25; BMI ≥ 25.00 kg/m2 ); and normal (GN; n = 25; 18.00 ≤ BMI ≤ 24.99 kg/m2 ). Thereafter, variables such as socio-economic level, anthropometric parameters (body mass index and gestational weight gain), systemic conditions, periodontal status, and oral health-related quality of life using the short version of the Oral Health Impact Profile (OHIP-14), were evaluated. RESULTS: There was no significant difference between groups in schooling level, monthly household income and gestational weight gain (P > 0.05). The GE group showed a higher frequency of arterial hypertension (P = 0.018), sought dental services less frequently (P = 0.035), had a higher prevalence of periodontitis (P = 0.011), and had a higher OHIP-14 overall score (P = 0.004) characterised by physical and psychological impact. In the final binary logistic regression models, high maternal BMI was associated with arterial hypertension and periodontitis during pregnancy, while periodontitis was strongly associated with moderate and high impact on quality of life. CONCLUSION: Pregnant women in the third trimester with excessive weight, assisted by the Brazilian public health-care system, presented with a higher prevalence of arterial hypertension, worse periodontal conditions and consequent high impact on quality of life.

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PURPOSE: Rural populations may be at increased risk for prevalent oral diseases. The aim of this study was to compare oral health status of adolescents of rural and urban areas from central Chile. METHODS: A representative sample of 552 and 486 adolescents aged 12 and 15 years, respectively, was examined using WHO methods. Adolescents were chosen from schools belonging to urban and rural districts of the region. Caries status was obtained by decayed, missing, filled teeth (DMFT) and significant caries (SiC) indexes. The gingival exam included the oral hygiene index (OHI) of Silness and Löe and the gingival index (GI) of Löe and Silness. Clinical attachment loss and community periodontal index (CPI) were restricted to 15-year-old adolescents. Statistical comparisons of medians and means were performed with the Mann-Whitney U-test. To determine the association between caries experience and oral hygiene and gingival indexes, Spearman's correlation was used at p<0.05. RESULTS: Twelve-year-old children from rural areas had caries prevalence of 67.50%, which was significantly higher (p<0.05) than children from urban areas, who had 54.04%. Caries experience of 12-year-old rural children was significantly higher (DMFT 3.36; standard deviation (SD) 2.71) than that of urban children (DMFT 2.29; SD 2.17) (p=0.0001). Rural adolescents also showed increased caries severity (SiC 6.21; SD 2.44), whereas urban children showed had a SiC of 4.71 (SD 1.74) (p=0.0001). For periodontal indexes, the average GI for 12-year-olds was 1.51 (SD 0.33), which corresponds to moderate inflammation, but rural subjects (GI 1.55; SD 0.34) had higher values (p=0.002) than their urban counterparts (GI 1.45; SD 0.29). In 15-year-old adolescents, caries prevalence was significantly higher in rural (73.58%) than in urban (64.59%) individuals (p<0.05). Although not significant, caries experience for 15-year-olds in rural areas, like in the other age group, was slightly higher than for urban 15-year-olds (DMFT 5.03; SD 3.61 and DMFT 4.65; SD 3.58, respectively) (p=0.238). The SiC in the rural subjects (9.16; SD 2.26) of this age group was significantly higher than for urban adolescents (8.51; SD 3.00). No significant differences either in the OHI (p=0.418) or in the GI (p=0.624) were observed between rural and urban participants. CONCLUSIONS: Adolescents of central Chile show clear disparities in oral health, with rural communities more affected. Gingival health seems to be less impacted by rurality than caries experience. Other social determinants of oral health may also explain these results, and further research appears necessary.

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Indigenous populations around the world experience a disproportionate burden in terms of oral diseases and conditions. These inequalities are likely due to a complex web of social determinants that includes poverty, historical consequences of colonialism, social exclusion, government policies of assimilation, cultural annihilation, and racism in all its forms (societal, institutional). Despite documented oral health disparities, prevention interventions have been scarce in Indigenous communities. This review describes oral health interventions and their outcomes conducted for Indigenous populations of the United States, Canada, Brazil, Australia, and New Zealand. The review includes research published since 2006 that are available in English in electronic databases, including MEDLINE. A total of 13 studies were included from the United States, Canada, Brazil, and Australia. The studies reviewed provide a wide range of initiatives, including interventions for prevention and treatment of dental disease, as well as interventions that improve oral health knowledge, behaviors, and other psychosocial factors. Overall, 6 studies resulted in improved oral health in the study participants, including improvements in periodontal health, caries reduction, and oral health literacy. Preferred intervention methodologies included community-based research approaches, culturally tailored strategies, and use of community workers to deliver the initiative. Although these studies were conducted with discrete Indigenous populations, investigators reported similar challenges in research implementation. Recommendations for future work in reducing oral health disparities include addressing social determinants of health in various Indigenous populations, training future generations of dental providers in cultural competency, and making Indigenous communities true partners in research.

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Since the classical epidemiological studies by Dean, it has been known that there should be an optimum level of exposure to fluoride that would be able to provide the maximum protection against caries, with minimum dental fluorosis. The "optimal" daily intake of fluoride for children (0.05-0.07 mg per kilogram bodyweight) that is still accepted worldwide was empirically determined. In the present review, we discuss the appropriateness of the current guidance for fluoride intake, in light of the windows of susceptibility to caries and fluorosis, the modern trends of fluoride intake from multiple sources, individual variations in fluoride metabolism, and recent epidemiological data. The main conclusion is that it is very difficult to think about a strict recommendation for an "optimal" range of fluoride intake at the individual level in light of existing knowledge of 1) the mechanisms of action of fluoride to control caries, 2) the mechanisms involved in dental fluorosis development, 3) the distinct factors that interfere in the metabolism of fluoride, and 4) the windows of susceptibility to both dental caries and fluorosis development. An "optimal" range of fluoride intake is, however, desirable at the population level to guide programs of community fluoridation, but further research is necessary to provide additional support for future decisions on guidance in this area. This list includes the effect of factors affecting fluoride metabolism, clinical trials on the effectiveness of low-fluoride dentifrices to prevent caries in the primary dentition, and validation of biomarkers of exposure to fluoride.

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The objective of the study is to propose a protocol for the appropriate use of fluorides in dentifrices (Dt), based on its bioavailability in saliva (Bs) and / or plaque (Bp) through a systematic review (SR). SR of the literature from 2005 to 2015 in PubMed, Cochrane and SciELO. Inclusion criteria: clinical studies in vivo, Spanish and English, made only with Dt that measured Bs and Bp. The results were evaluated in relation to: 1) Concentration of fluoride in Dt, 2) Brushing time with Dt, 3) Frequency of brushing, 4) Rinse post-brushing and 5) Amount of Dt on the brush. Twelve (12) studies were selected. 1) Bs increases 241 % when using a 5000 ppm of Dt compared to 1450 ppm. 2) Bs is increased by 55 % by increasing the duration of brushing 40 s to 120 s 3) Bp increases by 68 % when brushing 3 times a day compared to 2 times. 4) Not rinsing or rinsing with <10 ml for <10 s increases Bs to 270 % compared to rinses higher volume / time. 5) By increasing the amount of Dt of 0.5 g to 1.5 g, Bs increases up to 266 %. The use of 1.5 g of Dt 1450 ppm of fluoride for 120 s, 3 times a day is recommended and once brushing is complete avoiding oral rinse with water or non fluoride mouthwash.

El objetivo de este studio es proponer un protocolo para el uso adecuado de fluoruros en dentífricos (Dt), basado en su biodisponibilidad en saliva (Bs) y/o placa (Bp) mediante una revisión sistemática (RS). RS de la literatura 2005- 2015 en PubMed, Cochrane y SciELO. Criterios de inclusión: estudios clínicos in vivo, español e inglés, realizados únicamente con Dt que midieran Bs y Bp. Los resultados fueron evaluados en relación a: 1) Concentración de flúor en el Dt, 2) Tiempo de cepillado con Dt, 3) Frecuencia de cepillado, 4) Enjuague post-cepillado y 5) Cantidad de Dt en el cepillo. Fueron seleccionados 12 estudios. 1) La Bs aumenta en un 241 % al utilizar un Dt de 5000 ppm en comparación con un 1450 ppm. 2) Bs aumenta en un 55 % al aumentar la duración del cepillado de 40 s a 120 s, 3) La Bp aumenta en un 68 % al cepillarse 3 veces al día en comparación a 2 veces. 4) No enjuagarse o enjuagues de <10 ml por <10 s puede aumentar la Bs hasta en un 270 % en comparación a enjuagues con mayor volumen/tiempo. 5) Al aumentar la cantidad de Dt de 0,5 g a 1,5 g, la Bs aumenta hasta en un 266 %. Se recomienda utilizar 1,5 g de Dt 1450 ppm de flúor por 120 s, 3 veces al día, y evitar enjuague oral con agua o colutorios sin flúor una vez finalizado el cepillado.

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RESUMO

BACKGROUND: Oral disease is a potentially treatable determinant of mortality and quality of life. No comprehensive multinational study to quantify oral disease burden and to identify candidate preventative strategies has been performed in the dialysis setting. METHODS: The ORAL disease in hemoDialysis (ORALD) study was a prospective study in adults treated with hemodialysis in Europe (France, Hungary, Italy, Poland, Portugal and Spain) and Argentina. Oral disease was assessed using standardized WHO methods. Participants self-reported oral health practices and symptoms. Sociodemographic and clinical factors associated with oral diseases were determined and assessed within nation states. RESULTS: Of 4726 eligible adults, 4205 (88.9%) participated. Overall, 20.6% were edentulous [95% confidence interval (CI), 19.4-21.8]. Participants had on average 22 (95% CI 21.7-22.2) decayed, missing or filled teeth, while moderate to severe periodontitis affected 40.6% (95% CI 38.9-42.3). Oral disease patterns varied markedly across countries, independent of participant demographics, comorbidity and health practices. Participants in Spain, Poland, Italy and Hungary had the highest mean adjusted odds of edentulousness (2.31, 1.90, 1.90 and 1.54, respectively), while those in Poland, Hungary, Spain and Argentina had the highest odds of ≥14 decayed, missing or filled teeth (23.2, 12.5, 8.14 and 5.23, respectively). Compared with Argentina, adjusted odds ratios for periodontitis were 58.8, 58.3, 27.7, 12.1 and 6.30 for Portugal, Italy, Hungary, France and Poland, respectively. National levels of tobacco consumption, diabetes and child poverty were associated with edentulousness within countries. CONCLUSIONS: Oral disease in adults on hemodialysis is very common, frequently severe and highly variable among countries, with much of the variability unexplained by participant characteristics or healthcare. Given the national variation and high burden of disease, strategies to improve oral health in hemodialysis patients will require implementation at a country level rather than at the level of individuals.

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