Theoretical explanations for social inequalities in oral health

Immigration and Oral Health in Older Adults: An Integrative Approach

The aim of this study was to develop an integrative framework on aging, immigration, and oral health. The methodology was a critical review that used immigration as a social determinant framework through which to evaluate its impact on the oral health of older immigrants. We reviewed recent empirical evidence on factors related to oral health in older immigrants. In a systematic search across multiple databases, we identified 12 eligible studies in this review. Among the eligible studies, most were conducted among East Asian immigrants (8 articles), followed by non-Hispanic White/European origin (2 articles), Mexican origins (1 article), and Iran and other Middle East regions (1 article). The research revealed knowledge gaps in the evidence base, including the dynamic relationship between acculturation and oral health, the role of environmental factors on oral health for immigrants, psychosocial stressors and their relationship with oral health, and oral health literacy, norms, and attitude to dental care utilization and oral hygiene practices. The development of the integrative framework suggests the pathways/mechanisms through which immigration exerts influences on oral health in later life. This provides opportunities for researchers, practitioners, and policy makers to gain greater insights into the complex associations between immigration and oral health among older adults.

Socioeconomic status and oral health-related quality of life: A systematic review and meta-analysis

OBJECTIVES

To systematically review observational studies assessing the association between socioeconomic status (SES) and oral health-related quality of life (OHRQoL) in children, adolescents and adults.

METHODS

Electronic searches were performed in the PubMed, Embase, Web of Science, LILACS and Scopus databases for articles published up to September 2020. Two independent reviewers performed the search and critical appraisal of the studies. The inclusion criteria were observational studies that evaluated the effect of SES on the OHRQoL in all age groups using validated methods. Quality assessment was conducted using the Newcastle-Ottawa Scale. Data were extracted for meta-analysis followed by a meta-regression analysis. A random-effects model was used to estimate the pooled calculate prevalence ratio (PR) and respective 95% confidence intervals (CI) for each study.

RESULTS

The search strategy retrieved 6114 publications. Some 139 articles met the eligibility criteria and were included in the systematic review. Of those, 75 were included in the general meta-analysis they represented a total sample of 109 269 individuals. People of lower SES had worse OHRQoL (PR 1.30; 95% CI 1.26-1.35). In the meta-analyses of different subgroups, an association was found between low SES and worse OHRQoL in countries of all economic classifications, in all age groups and irrespective of the socioeconomic indicator used. A socioeconomic gradient in OHRQoL was also observed, in which the lower the individuals' socioeconomic position, the poorer their OHRQoL.

CONCLUSIONS

Individuals of low SES had poorer OHRQoL, regardless of the country's economic classification, SES indicator and age group. Public policies aiming to reduce social inequalities are necessary for better OHRQoL throughout life.

Experiencing Financial Strain and Clinically Assessed Caries Experience in Dentate Adults Aged 25-44 Years: An Exploration of Potential Pathways

Large socioeconomic inequalities still exist in oral health. It is already known that oral health-related behaviour may contribute to these inequalities, but why people with a lower socioeconomic position behave less healthily is not easily understood. A possible explanation that integrates insights on health behaviour, stress, and financial resources is the pathway of behavioural responses to financial strain. The aim of this study was to assess to what extent financial strain is associated with clinically assessed caries experience in a population-based study of dentate adults, independently of other socioeconomic indicators. Furthermore, the potential mediating pathways of oral health-related behaviours (oral hygiene, dietary habits, preventive dental visits) were explored. Dentate participants, aged 25-44 years, taking part in a survey on oral health and preventive behaviour in the Netherlands in 2013 were clinically examined on - among others - caries experience (DMFS index) and level of oral hygiene (OHI-s index). Financial strain, frequency of tooth brushing, dietary habits, attendance of (preventive) dental visits in the past year, and demographic variables were assessed via questionnaires. Negative binomial hurdle models were used to study the association between financial strain and DMFS and between oral health behavioural indicators and DMFS. Although it was observed that experiencing financial strain did not seem to affect whether there is any caries experience or not, among those having any caries (DMFS >0) suffering from financial strain was associated with a higher caries prevalence, independent of educational level and income. None of the studied potential mediators could explain this association.

Association of Education and Depressive Symptoms with Tooth Loss

Previous evidence suggests the association of lower educational attainment and depressive symptoms with tooth loss. The hypothesis of this study was that these factors may exacerbate the effect on tooth loss beyond the sum of their individual effects. We aimed to clarify the independent and interactive effects of educational attainment and depressive symptoms on the number of missing teeth among community residents. Cross-sectional data of 9,647 individuals were collected from the general Japanese population. Dental examination was conducted by dentists. Educational attainment was categorized into 3 levels based on the number of educational years: ≤9, >9 to ≤12, and >12 y. The Center for Epidemiologic Studies Depression Scale (CES-D) was used to assess depressive symptoms; a total score of ≥16 and/or the use of medications for depression indicate the presence of depressive symptoms. In the multivariate analysis with adjustment for conventional risk factors, educational attainment was identified as a determinant of the number of missing teeth (>9 to ≤12 y of education: coefficient = 0.199, 95% confidence interval [CI], 0.135 to 0.263, P < 0.001; ≤9 y of education: coefficient = 0.318, 95% CI, 0.231 to 0.405, P < 0.001: reference, >12 y of education). An analysis that included interaction terms revealed that the relationship between "≤9 y of education" and the number of missing teeth differed depending on the depressive symptoms, indicating a positive interactive association (coefficient for interaction = 0.198; 95% CI, 0.033 to 0.364, P for interaction = 0.019: reference, >12 y of education). Our study suggests the presence of a significant association between educational attainment and tooth loss, as well as a partial interactive association between "≤9 y of education" and "depressive symptoms" in the general Japanese population.

Availability of public dental care service and dental caries increment in children: a cohort study

OBJECTIVE

Evaluate the impact of the availability of public dental care service on the increment of dental caries in children.

METHODS

This is a 2-year cohort study that followed preschool children from southern Brazil. Dental caries was measured at baseline and follow-up evaluation, considering the number of surfaces with untreated dental caries. Demographic and socioeconomic characteristics as well as the use and availability of dental services were assessed. Multilevel Poisson regression analysis through a hierarchical approach and considering a random effect for repeated measures was used to explore the influence of exploratory variables in the increase in the outcome.

RESULTS

A total of 419 cases were evaluated at follow-up (91.3% cohort retention rate). The increase in the untreated dental caries was associated with living in places where there is no regular presence of dentists in the public health system. In addition, the increment of dental caries was influenced by age, household income, and dental attendance.

CONCLUSION

The results suggest that the availability of dentists in the public health system have an impact the increment of dental caries among children. The integration of the dentist in the primary healthcare can contribute to decrease the barriers that lead to children's oral health.

Autopercepção da saúde bucal por indígenas: uma análise de classes latentes

Resumo Dada a limitada compreensão do perfil de saúde bucal de indígenas, este estudo se propôs a investigar a autoavaliação da saúde bucal desse grupo populacional. Objetivou-se verificar a associação do impacto autopercebido da saúde bucal na vida diária com aspectos sociodemográficos e de caracterização da saúde bucal entre indígenas de 10 a 14 anos da etnia Xukuru do Ororubá, Pesqueira – PE, Brasil. Trata-se de um estudo transversal desenvolvido no período de janeiro a março de 2010, com realização de exames bucais e aplicação de questionários a 233 indígenas pertencentes ao grupo etário. Por meio do modelo de análise de classes latentes, a variável “impacto da saúde bucal” foi criada e aplicada em modelos de regressão logística simples e múltipla. Os resultados apontaram que aldeias com maior média de domicílios e indígenas com experiência de cárie apresentaram pior autopercepção, aumentando o “impacto da saúde bucal” em 2,37 e 3,95 vezes respectivamente. A Análise de Classes Latentes mostrou-se uma excelente estratégia para compreensão da autopercepção bucal indígena e sua relação com fatores associados.

Effect of dental caries and socioeconomic status on social capital throughout adolescence: a 6-year follow-up

The aim of the study was to investigate the influence of clinical and socioeconomic factors on social capital throughout adolescence. A cohort study was performed in 2012 (T1) with a random sample of 1,134 12-year-old adolescents from Santa Maria, Brazil. Questions on socioeconomic factors (maternal education, household income, household crowding) were answered by the parents. Clinicians evaluated their dental caries (decayed, missing, and filled status of permanent teeth) and gingival bleeding (using the Community Periodontal Index). Contextual variables including the mean income of the neighborhood in which the school was located were used (T1). The adolescents were revaluated in 2018 (T2) and answered questions regarding social capital (social trust, social control, empowerment, neighborhood security, and political effectiveness). A path analysis was used to test the relationship between the predictor variables (T1) and social capital (T2). A total of 768 adolescents were reevaluated at a 6-year follow-up (cohort retention rate of 67.7%). Most of the adolescents were girls, with a low household income, about 40% had caries experience (T1), and about 64% had high social capital (T2). The highest neighborhood's mean income was related to a lower household income in T1 (p < 0.01), and this was directly related to a low social capital in T2 (p = 0.04). Furthermore, caries experience at T1 was directly associated with low social capital at T2 (p = 0.03). Socioeconomic factors were also related to caries experience. Individuals who lived in neighborhoods with greater inequality such as families with a low household income and those with untreated dental caries in early adolescence, had a low social capital after follow-up.

Periodontal status, perceived stress, diabetes mellitus and oral hygiene care on quality of life: a structural equation modelling analysis

BACKGROUND

To determine if periodontal risk assessment (PRA), the number of missing teeth, diabetes mellitus (DM), perceived stress and interproximal cleaning are associated with oral health-related quality of life (OHRQoL), using Andersen's behavioral modelling (ABM).

MATERIAL AND METHODS

Data derived from 472 adults derived from a representative population of the Study of Periodontal Health in Almada-Seixal (SoPHiAS) was used. Socioeconomic status, perceived stress scale (PSS-10), oral health behaviors and oral health impact profile (OHIP-14) were collected through questionnaire. Periodontal conditions were assessed with a full-mouth periodontal examination. PRA was computed through behavioral and clinical information. Variables were grouped into Predisposing Factors, Enabling, Need, Oral Health Behaviors and Perceived Health Outcome latent variables. Confirmatory factor analysis, structural ABM and model fitness were conducted.

RESULTS

ABM applied to OHIP-14 showed acceptable model fit (χ2 = 2.75, CFI = 0.92, TLI = 0.90, RMSEA = 0.05, CI 90% [0.04-0.07]). The average of OHRQoL was 9.5 ± 11.3. Patient with periodontitis and with a high number of missing teeth experienced worse OHRQoL. Uncontrolled DM participants had more periodontal treatment necessity and poorer OHRQoL. Characteristic like aging and lower levels of education were directly associated with better OHRQoL, but in indirect path the OHRQoL was diminishes. Good oral hygiene and preventative measures were associated to lower periodontal treatment necessity. Lower periodontal treatment necessity was associated to higher OHRQoL. Age, tooth loss and interproximal cleaning were the most associated items to Predisposing, Need and Oral Health Behaviors, respectively.

CONCLUSION

ABM confirmed age, number of missing teeth, DM, interproximal cleaning and perceived stress as associated factors for OHRQoL. Uncontrolled DM was associated to higher Need and poorer OHRQoL. Good oral hygiene habits promote a healthy periodontium and, consequently, increases OHRQoL.

Consommation de soins dentaires préventifs en région Centre-Val de Loire : une étude rétrospective

CONTEXT

The demography of dentist-surgeons in the Centre-Val de Loire region is far inferior to the national average and characterized by many territorial inequalities of health. The aim of this study is to provide details concerning the dental hygienic care-seeking consumption habits in this region based on one dental care treatment, dental scaling, which allows for the mechanical elimination of dental plaque in order to prevent periodontal diseases.

METHOD

This retrospective study is based on data from several databases of the National Health Insurance Cross-Schemes Information System (Sniiram) for the year 2016, analyzed by the Statistical Institute of Liberal Health Professionals.

RESULTS

It can be observed that less scaling treatments have been sought out in this region in comparison with metropolitan France and certain territories which also face difficulties in terms of care treatment offers and scaling treatment inferior to the regional average. Although the care offer is unequally distributed, it seems to have little influence on the number of treatment acts consumed per patient and notably scaling treatments. Inversely, indicators of wealth or poverty do have an impact on treatment consumption HBJD001.

CONCLUSION

This study suggests that the consumption of scaling treatment is independent from the dental care offers, but linked to the social gradient of the population. It points to the deficit in the consumption of this treatment in comparison to metropolitan France. The potential role of the HBJD001 treatment as a marker of the trajectory of preventive health care as well as the necessity of the adjustment of the zones determined by the ARS are put forward.

Perceived Stress, Social Support, and Dry Mouth Among US Older Chinese Adults

OBJECTIVES

Dry mouth is a common condition among older adults that negatively influences oral health, general health, and quality of life. The role of psychosocial factors in oral health conditions and diseases remains largely unknown. We conducted a study to examine the relationship between perceived stress and dry mouth among US older Chinese adults and further investigated the potential moderating role of social support and social strain from different sources in the relationship.

DESIGN

Cross-sectional analysis.

SETTING

Baseline of the Population Study of Chinese Elderly in Chicago, a community-engaged, population-based longitudinal study of health and well-being among community-dwelling US older Chinese adults.

PARTICIPANTS

Individuals 60 years or older (N = 3157).

MEASUREMENTS

Perceived stress was measured by the 10-item Chinese Perceived Stress Scale to evaluate the degree to which life situations were perceived as stressful during the preceding month on a 5-point scale, ranging from 0 ("never") to 4 ("very often"). Dry mouth was a binary self-reported outcome variable (1 = "dry mouth"). Social support was measured by the Health and Retirement Study's social support and strain scale from sources including spouse, other family members, and friends with a 3-point response set, ranging from 0 ("hardly ever") to 2 ("often"). Sociodemographics and disease processes were assessed as covariates. We conducted stepwise logistic regressions with interaction terms.

RESULTS

Having higher levels of perceived stress was significantly associated with a higher likelihood of reporting dry mouth (odds ratio = 1.03; 95% confidence interval = 1.02-1.04). The effect of perceived stress on dry mouth may vary by levels of family and friend support.

CONCLUSION

Perceived stress may influence dry mouth either directly or indirectly. To prevent or reduce dry mouth, in addition to disease processes, interventions need to consider psychosocial factors in dry mouth, especially perceived stress and social support, in this growing population. J Am Geriatr Soc 67:S551-S556, 2019.

Parenting stress as a mediator in the oral health of children and adolescents: A stress process model

OBJECTIVES

We tested hypotheses regarding socioeconomic status (SES) disparities in oral health amongst children and adolescents and the extent to which such SES disparities may be mediated by parenting stress.

METHODS

We analysed data from the 2011/2012 US National Survey of Children's Health for ages 6-11 years (n = 21 596) and 12-17 years (n = 23 584). Our models estimated associations between SES indicators (family income and parental education) and parenting stress with two oral health outcomes: parent-reported child oral health and preventive dental visits.

RESULTS

For both age groups, SES was positively associated with both oral health outcomes. Parenting stress mediated the relationship between SES and child oral health, not preventive dental visits-such that lower SES was associated with worse oral health via higher parenting stress. Amongst children, the indirect effect of parenting stress was observed for parental education and family income, whilst amongst adolescents, no indirect effect of parenting stress was observed.

CONCLUSION

Parenting stress was an important determinant of children's oral health and partially explained the SES-related oral health disparities in children. Future research is needed to explore the causal pathways in this association.

Self-Reported General and Oral Health in Adults in the United States: NHANES 1999-2014

Objective

To assess self-reported general health (SRGH) and self-reported oral health (SROH), and to identify factors associated with these self-health reports among adults in the United States.

Methods

Data from the National Health and Nutrition Examination Survey (NHANES) for 1999 to 2014 were analyzed. Survey-weighted descriptive statistics were computed and Pearson correlations between the two self-reported health status measures were tested. Separate multivariable logistic regressions in SROH and SRGH were performed. Measures of inequality-absolute inequality (AI) and relative inequality (RI) in SRGH and SROH were investigated.

Results

The sample consisted of 37,904 adults. Survey-weighted proportions of “excellent or very good” general health decreased from 54% in 1999–2000 to 45% in 2013–2014 and that of oral health increased from 27% in 1999–2000 to 38% in 2013–2014. Whites, participants with college degrees and those ≥400% of family poverty income ratio (PIR) had a higher probability of reporting “excellent or very good” general and oral health. Young people had a higher probability of reporting “excellent or very good” general health and the probability of reporting “excellent or very good” oral health fluctuated among the different age groups. There was a slight increase in both AI and RI by sociodemographic factors for SRGH (except for gender). For SROH, AI increased slightly, and RI decreased slightly (except for education) over the same period.

Conclusion

Self-reported general health had higher ratings than self-reported oral health. Survey period, age, race/ethnicity, education and family PIR were significantly associated with SRGH and SROH, but gender was only significant in the SROH model. SRGH was significantly associated with SROH after adjusting for other sociodemographic factors.

Influence of socioeconomic inequalities on levels of dental caries in adolescents: A cohort study

BACKGROUND

Socioeconomic factors at both contextual and individual levels influence health.

AIM

Evaluate the influence of socioeconomic inequalities on the incidence of dental caries in adolescents.

DESIGN

This cohort study was conducted with a multistage random sample of 1134 12-year-old adolescents from Southern Brazil. The experience of dental caries was assessed according to the decayed, missed, or filled surfaces (DMF-S) index. The Basic Education Development Index (IDEB) was collected during baseline as a school-level variable. Individual variables included demographic, socioeconomic, behavior-related, and oral health measures. Multilevel Poisson regression analysis through a hierarchical approach was used to explore the influence of exploratory variables on the mean of decayed surfaces.

RESULTS

770 14-year-old adolescents were reevaluated (follow-up rate of 68%) after 2 years. Examiner's Kappa values for the assessment of dental caries ranged from 0.81 to 0.90. Adolescents with low household income and lower school's IDEB had higher mean of decayed surfaces. Non-white adolescents, lower frequency of dental attendance, parents' poor perception of child's oral health, and dental plaque were also associated with the incidence of dental caries.

CONCLUSION

Adolescents from a lower socioeconomic background and poor school context had higher levels of dental caries over time.

The effect of enamel fractures on oral health-related quality of life in adolescents

BACKGROUND/AIM

Enamel fractures are the most common type of traumatic dental injury (TDI) in children and adolescents. Recognizing the impact of these fractures on oral health-related quality of life (OHRQoL) could contribute to the establishment of treatment protocols. The aim of this study was to assess and quantify the impact of enamel fractures on overall OHRQoL and domain scores in adolescents.

MATERIALS AND METHODS

A cross-sectional study was conducted with 775 adolescents aged 11 to 14 years in the city of Santo Ângelo in southern Brazil. Sociodemographic variables were collected from parents/caregivers using a structured questionnaire. The adolescents answered the Child Perceptions Questionnaire (CPQ_11-14 ). Physical examinations were performed by an examiner who had undergone training and calibration exercises for the investigation of TDI (Andreasen criteria), dental caries (WHO criteria), and malocclusion (Dental Aesthetic Index). Data analysis involved Poisson regression with robust variance.

RESULTS

The prevalence of TDI was 11.9% and enamel fractures accounted for 79.3% of all injuries. In the multivariate analysis, adolescents with enamel fractures had 29% higher CPQ_11-14 scores (worse OHRQoL) than those without TDI, even after adjustment for sociodemographic and clinical variables (mean ratio = 1.29; 95% CI: 1.09-1.53; P = .003). Enamel fractures exerted a negative impact on the functional limitation, emotional well-being, and social well-being domains.

CONCLUSIONS

Enamel fractures exert a negative impact on the OHRQoL of adolescents, suggesting that subjective measures should be incorporated in the evaluation of patients with this traumatic injury.

The Relationship among Functional Health Literacy, Self-Rated Health, and Social Support among Younger and Older Adults in Ghana

It is well established that health literacy positively affects health outcomes, and social support influences this association. What remains unclear is which aspect of social support (instrumental, informational, and emotional support) is responsible for this effect and whether the influence differs from one population group to another. This study addresses these lacunae. It examines the impact each type of support makes on the relation between functional health literacy (FHL) and self-rated health status among younger and older adults in Ghana. Data were pooled from two cross-sectional surveys, together comprising 521 participants in the Ashanti Region. The results indicated that young adults were more likely to possess sufficient FHL and perceive their health more positively than older adults. While FHL was positively associated with health status, the relation was stronger when young adults received a high level of emotional support. Among older persons, informational support substantially moderated the association between FHL and health status. Thus, social support modifies the relations between FHL and health status among younger and older adults in different ways and to different degrees. Therefore, interventions to improve FHL and health amongst younger and older adults should pay due regard to relevant aspects of social support.

Socioeconomic status, social support, oral health beliefs, psychosocial factors, health behaviours and health-related quality of life in adolescents

PURPOSE

This study assessed the relationships between socioecononic status (SES), social support, oral health beliefs, psychosocial factors, health-related behaviours and health-related quality of life (HRQoL) in adolescents.

METHODS

A school-based follow-up study involving 376 12-year-old adolescents was conducted in Manaus, Brazil. Baseline data included sociodemographic characteristics (sex, parental schooling, family income, household overcrowding and number of goods), social support (SSA questionnaire), oral health beliefs and psychosocial factors (Sense of Coherence [SOC-13 scale] and self-esteem [Rosenberg Self-Esteem Scale]). Health-related behaviours (toothbrushing frequency, sedentary behaviour, smoking and sugar consumption) and HRQoL [KINDL questionnaire] were assessed at 6-month follow-up. Structural Equation Modelling assessed the relationships between variables.

RESULTS

Greater social support (β = 0.30), higher SOC (β = 0.23), higher self-esteem (β = 0.23), higher toothbrushing frequency (β = 0.14) and less smoking (β = - 0.14) were directly linked with better HRQoL. SES (β = 0.05), social support (β = 0.26), oral health beliefs (β = - 0.02) were indirectly linked to HRQoL. Higher SES directly predicted higher toothbrushing frequency (β = 0.14) and less smoking (β = - 0.22). Greater social support also directly predicted higher SOC (β = 0.55), positive oral health beliefs (β = - 0.31) and higher self-esteem (β = 0.58). Greater social support indirectly predicted less smoking via oral health beliefs (β = - 0.05) and less sugar consumption via SOC (β = - 0.07).

CONCLUSION

Socioeconomic status, social support, oral health beliefs and psychosocial factors were important predictors of adolescent's health behaviours and HRQoL over 6-month period through direct and indirect mechanisms. Health behaviours also directly influenced HRQoL.

Socioeconomic inequalities in oral health-related quality of life in adolescents: a cohort study

PURPOSE

Socioeconomic inequalities are recognized as a major problem with people in low socioeconomic groups having worse subjective oral health outcomes, including oral health-related quality of life (OHRQoL). However, only a few longitudinal studies assessed the impact of contextual and individual socioeconomic determinants in adolescents' OHRQoL. We estimate the impact of socioeconomic inequalities on adolescents' OHRQoL over a 2-year period.

METHODS

This study followed up a random sample of 1134 12-year-old schoolchildren for 2 years in Brazil. OHRQoL was assessed by the Brazilian version of the Child Perceptions Questionnaire for 11- to 14-year-old Children (CPQ11-14) at baseline and follow-up. Participants were clinically examined for dental caries, gingival bleeding, and malocclusion. The schoolchildren's parents answered a questionnaire regarding socioeconomic status, social capital, and adolescents' use of dental service. Socioeconomic contextual variables were collected from official city publications. Multilevel linear regression models fitted the associations between socioeconomic factors and overall CPQ11-14 scores over time.

RESULTS

A total of 747, 14-year-old adolescents were reassessed for OHRQoL (follow-up rate of 66%). Adolescents with lower mean income school's neighborhood (P < 0.05), household income (P < 0.05), and maternal schooling (P < 0.05) had higher overall CPQ11-14 scores. Female sex, attending a dentist by toothache, dental caries, and malocclusion were also associated with higher overall CPQ11-14 scores.

CONCLUSIONS

Adolescents from low socioeconomic background reported worse OHRQoL at 2-year follow-up compared to those from high socioeconomic background. Actions toward health inequalities need to address socioeconomic factors in adolescence.

The Relationship between Income and Oral Health: A Critical Review

In this critical review, we summarized the evidence on associations between individual/household income and oral health, between income inequality and oral health, and income-related inequalities in oral health. Meta-analyses of mainly cross-sectional studies confirm that low individual/household income is associated with oral cancer (odds ratio, 2.41; 95% confidence interval [CI], 1.59-3.65), dental caries prevalence (prevalence ratio, 1.29; 95% CI, 1.18-1.41), any caries experience (odds ratio, 1.40; 95% CI, 1.19-1.65), tooth loss (odds ratio, 1.66; 95% CI, 1.48-1.86), and traumatic dental injuries (odds ratio, 0.76; 95% CI, 0.65-0.89). Reviews also confirm qualitatively that low income is associated with periodontal disease and poor oral health-related quality of life. Limited evidence from the United States shows that psychosocial and behavioral explanations only partially explain associations between low individual/household income and oral health. Few country-level studies and a handful of subnational studies from the United States, Japan, and Brazil show associations between area-level income inequality and poor oral health. However, this evidence is conflicting given that the association between area-level income inequality and oral health outcomes varies considerably by contexts and by oral health outcomes. Evidence also shows cross-national variations in income-related inequalities in oral health outcomes of self-rated oral health, dental care, oral health-related quality of life, outcomes of dental caries, and outcomes of tooth loss. There is a lack of discussion in oral health literature about limitations of using income as a measure of social position. Future studies on the relationship between income and oral health can benefit substantially from recent theoretical and methodological advancements in social epidemiology that include application of an intersectionality framework, improvements in reporting of inequality, and causal modeling approaches. Theoretically well-informed studies that apply robust epidemiological methods are required to address knowledge gaps for designing relevant policy interventions to reduce income-related inequalities in oral health.

Material, behavioural, cultural and psychosocial factors in the explanation of socioeconomic inequalities in oral health

Background

This study aimed to assess the contribution of material, behavioural, cultural and psychosocial factors in the explanation of socioeconomic inequalities (education and income) in oral health of Dutch adults.

Methods

Cross-sectional data from participants (25-75 years of age) of the fifth wave of the GLOBE cohort were used (n = 2812). Questionnaires were used to obtain data on material factors (e.g. financial difficulties), behavioural factors (e.g. smoking), cultural factors (e.g. cultural activities) and psychosocial factors (e.g. psychological distress). Oral health outcomes were self-reported number of teeth and self-rated oral health (SROH). Mediation analysis, using multivariable negative binomial regression and logistic regression, was performed.

Results

Education level and income showed a graded positive relationship with both oral health outcomes. Adding material, behavioural, cultural and psychosocial factors substantially reduced the rate ratio for the number of teeth of the lowest education group from 0.79 (95% confidence interval (CI): 0.75-0.83) to 0.92 (95% CI: 0.87-0.97) and of the lowest income group from 0.80 (95% CI: 0.73-0.88) to 1.04 (95% CI: 0.96-1.14). Inclusion of all factors also substantially reduced the odds ratio for poor SROH of the lowest education group from 1.61 (95% CI: 1.28-2.03) to 1.12 (95% CI: 0.85-1.48) and of the lowest income groups from 3.18 (95% CI: 2.13-4.74) to 1.48 (95% CI: 0.90-2.45).

Conclusion

In general, behavioural factors contributed most to the explanation of socioeconomic inequalities in adult oral health, followed by material factors. The contribution of cultural and psychosocial factors was relatively moderate.

Acculturation and Dental Caries Among Children in Spain

This study explored the relationship between different indicators of acculturation and children's caries experience. Data from 313 children attending the Dental Clinic of the European University of Madrid were analysed. Acculturation was measured via generational status, age at arrival, length of residence and language spoken at home. The association between each indicator of acculturation and caries experience was assessed in Poisson regression models adjusting for confounders. First- and second-generation migrant children had greater caries experience than Spanish-born children. These differences only persisted for first-generation migrant children after adjustment for confounders. Children who arrived in Spain before age 6 years, who lived in Spain for 10 or more years and who spoke a language other than Spanish at home had greater caries experience than Spanish-born children. Inequalities in caries experience between migrant and native children were evident (favouring the local children) and independent of family's socioeconomic circumstances.

Human ecological and social determinants of dental caries among the Xavante Indigenous people in Central Brazil

This community study evaluates complex interactions between macro and micro determinants of oral health in a local Indigenous population based on a theoretical framework of demographic, economic, and healthcare transformation over the last half century. The study population included all residents of eight Xavante villages in Central Brazil. Our hypothetical model posited multiple direct and indirect associations between dental caries and village groups with differentiated territorial and oral care histories, as well as household socioeconomic indicators and food acquisition patterns, individual sociodemographic characteristics, use of dental health services, and oral hygiene practices. Structural equation modelling methods were used to evaluate direct and indirect associations linking exogenous factors and dental caries. Results include 18 direct and 14 indirect statistically significant pathways between determinant variables and dental caries. Significant links with dental caries were shown for socioeconomic indicators, oral healthcare variables, household food acquisition patterns, sex, and age. These findings suggest that the oral health of Xavante residents in the villages studied is associated with determinant factors of different epidemiological and historical scales. The specific historical frame of territorial circumscription and demographic crisis followed by rapid population increase since the 1970s should be considered a cause-of-cause determinant of the economic, healthcare, and sociodemographic profile contributing to oral health among the Xavante. Considering the limitations of cross-sectional studies, our findings underline the importance for oral health determination of historical currents affecting minority ethnic groups within national societies.

Does poverty cause dental caries?

Dental caries generates significant health, financial and social costs to individuals and communities, but risk factors are not spread randomly and evenly throughout populations. People from lower socio-economic status (SES) and disadvantaged groups suffer a disproportionately greater disease burden. Clinicians and public health experts view this problem through a different lens. Dentists at the clinical coalface consider individual risk factors and behaviours, for example sugar consumption, cariogenic bacteria and poor oral hygiene, as major causes of dental caries. However, considerable evidence suggests that low SES, via traditional individual risk factors as mediators and through additional independent pathways, is another significant cause. Progressive clinical practice uses education, prevention and treatment to reduce the impact of individual risk factors. Policy-makers and health administrators use population-based approaches to improve the health of societies. The authors use literature review to argue for both a greater awareness of the upstream socio-economic causes of dental caries, and action from key community sectors to redress the societal inequalities contributing to dental health inequalities.

Neo-Marxian social class inequalities in oral health among the South Korean population

AIM

The aims of this study were to examine inequalities in periodontitis and tooth loss among South Korean adults using the Wright's Neo-Marxian social class (NMSC) indicator and to assess the impact of material, psychosocial, health behavioural and workplace environmental factors in the association of social class with oral health.

METHODS

This study used the data from the 4th Korea National Health and Nutrition Examination Survey with 6710 participants aged 19-54 years old. Participants were classified into 12 social class positions based on the Wright's social class map. Healthy gum and absence of tooth loss were the health outcomes. Mediating factors were material (M), psychosocial (PS), health behavioural (HB) and workplace environmental (WPE) factors. A series of logistic regressions were performed to analyse the data. Odds ratio (OR) and 95% confidence interval (CI) were used to report the results.

RESULTS

For the absence of periodontal pockets status, expert supervisors were the healthiest periodontal group among the social classes (OR = 2.15 95% CI 1.59-2.90) in the age and gender adjusted model. For the absence of tooth loss, skilled workers had the highest OR for absence of tooth loss (OR = 1.64 95% CI 1.31-2.05) in the age- and gender-adjusted model. For absence of periodontal pockets, the explanatory power of the M factor was the highest in all social class positions except for nonskilled supervisors followed by the HB factor. Additionally, the absence of tooth loss had a fairly similar pattern. The explanatory power of the M factor was the highest in all social class positions except for the petty bourgeoisie (highest: HB) and nonskilled supervisors (highest: WPE) followed by the HB and WPE factors.

CONCLUSION

There were nongradient oral health inequalities among the South Korean population according to the NMSC. Oral health promotion programmes that focus on changing the socioeconomic environment and health behaviours should be implemented.

Inequalities in dental caries in children within the UK: Have there been changes over time?

OBJECTIVES

To examine any change over time in the association between deprivation and caries experience between 2003 and 2013 in a nationally representative sample of UK children.

METHODS

Data from UK Children's Dental Health Surveys, 2003 and 2013, were used. The target population was 5-, 8-, 12- and 15-year-olds. A total of 9604 children in 2003 and 9866 in 2013 were included in the surveys. Outcome variables were any active caries, caries experience and total number of carious teeth. Family socio-economic position (SEP) or deprivation level was measured at school level using eligibility for free school meals (FSM) to identify children from low-income families. Incidence rate ratios (IRR) and pooled standardized incidence rates ratios were calculated to measure dichotomous outcome variables by year, age group and status of deprivation. The study continuous outcome was modelled using a zero-inflated Poisson regression while the dichotomous outcomes were modelled using logistic regressions. The multivariable analyses were run by age groups accounting for year, sex and deprivation status.

RESULTS

The percentage of those identified as deprived was significantly higher in 2013 (35.8% in 2013 vs 26.0% in 2003, P < 0.001). Among both deprived and non-deprived children, the prevalence of any active caries significantly dropped over the years, observed in all age groups. Comparing 2013 with 2003 and accounting for sex, deprivation level, "any active caries," "any caries experience" and "total number of carious teeth" significantly dropped were observed in all age groups. Comparing the years, the association of deprivation with caries outcomes mostly remained the same or decreased. This decrease was predominantly seen in "any caries experience." Only among the 5-year-olds, did the association between deprivation and total number of carious teeth over the years significantly increase. For all age groups, the likelihood of "any active caries" and "total number of carious teeth" by deprivation remained the same comparing the two points in time: 2003 and 2013. However, irrespective of year, deprivation was significantly associated with caries observed in all age groups.

CONCLUSION

In the UK, the prevalence of active dental caries and caries experience has decreased in the period between 2003 and 2013. Similarly, the likelihood of having dental caries by deprivation in 2013 was predominantly lower than that observed in 2003.

Oral Health Disparities in Children: A Canary in the Coalmine?

Despite being largely preventable, oral diseases are still a major public health problem in child populations in many parts of the world. Increasingly, however, oral diseases disproportionately affect socially disadvantaged groups in society. It is unjust and unfair that children and families from disadvantaged backgrounds experience high levels of oral diseases. This article analyzes oral diseases through a health disparities lens. Action to combat oral health disparities requires a radical multifaceted strategy that addresses the shared underlying root causes of oral diseases, the social determinants of health inequality.

The evolution of treatment over 80 years at the outpatient department of the Viennese school of dentistry

OBJECTIVES

The delivery of oral health services, diagnostics and treatment underwent significant changes in the 20th century thanks to achievements by pioneers in dentistry. The Golden Age of Dentistry in Vienna, Austria, was marked by renowned dentists like Bernhard Gottlieb in the 1930s. Data records from the outpatient department of this period have been found and served as a source from which to draw comparisons between those days and the present. To date, data supporting an overall perception of advances in dentistry during the last century in tooth preservation and patients' demands have been lacking. The aim of this study was to evaluate changes in treatments and patient characteristics between the interwar period and the present and to assess how treatments for dental emergencies developed.

METHODS

Patients' records were extracted from books handwritten from January to May 1933 and compared with electronically generated data from the same period in 2013. In total, patient data from 10 111 individuals (3878 in 1933 and 6233 in 2013) were analysed. Comparisons were undertaken for gender, age, place of residence, diagnosis and therapy.

RESULTS

Various statistically significant demographic and treatment differences were found between 1933 and 2013. Patients' mean ages in 2013 and 1933 were 42 and 31 years, respectively. In 2013, there were significantly more women than in 1933 (3378 vs 1936), with 54% women in 2013 and 50% women in 1933. In 2013, there were significantly fewer tooth extractions as dental emergency treatment than in 1933 (2% vs 34%).

CONCLUSIONS

Treatment in the outpatient department is much more conservative in the 21^st century. The characteristics of patients visiting the outpatient department have changed over the generations, and treatment needs should be evaluated accordingly.

The equity of access to primary dental care in São Paulo, Brazil: A geospatial analysis

OBJECTIVES

Brazil is one of the largest countries in the world, in terms of geography and population. Most Brazilians reside in the south and south-eastern regions, with notable numbers in the regions' megacities, such as São Paulo city. Healthcare provision in such a complex environment is difficult. Thus, a clear understanding of the distribution - or rather, the maldistribution - of these services is fundamental for optimising the allocation of human and financial resources to areas of greatest privation. The present study aimed to determine the distribution of primary dental clinics in São Paulo city.

METHODS

A total of 4,101 primary dental clinics in São Paulo city were identified and geocoded. Clinic locations were integrated with the city's 19,128 constituent census tracts - each containing sociodemographic data for the 11,252,204 residents - using Geographic Information Systems (GIS).

RESULTS

Approximately two-thirds (64.8%) of the population resided within 0.5 km of a primary dental clinic, and a further 23.9% were within 1 km. Populations more than 1 km out were typically characterised as sociodemographically disadvantaged. Primary dental clinics were also more sparsely distributed in the city's peripheral census tracts than central census tracts.

CONCLUSION

Primary dental clinics are maldistributed in São Paulo city, with disadvantaged populations having less spatial access than their advantaged counterparts.

Presence of Dental Caries Is Associated with Food Insecurity and Frequency of Breakfast Consumption in Korean Children and Adolescents

Dental caries remains one of the most common chronic diseases affecting children worldwide with a multi-factorial etiology. The objective of the study was to evaluate the association between socioeconomic status (SES), dietary intake, food insecurity (FI), and dental caries in Korean children and adolescents. The study utilized data from the 2-year Korean National Health and Nutrition Examination Survey (KNHANES) conducted with 1,559 Korean boys and 1,391 girls aged 2 to 18 years from 2012 to 2013. Fathers' education (P=0.017), mothers' education (P<0.001), and household income (P=0.049) were all significantly associated with dental caries among Korean boys. As for dietary practices, both eating breakfast (P<0.001) and frequency of eating out (P<0.001) were strongly associated with dental caries (P<0.001). Three models of FI were used and no differences were found regarding genders. In model 3, both food insecure male [odds ratio (OR)=1.682, 95% confidence interval (CI): 0.999~2.832] and female (OR=1.900, 95% CI: 1.094~3.299) subjects had higher odds of developing dental caries than food secure subjects after adjusting the confounding factors. The present study showed a strong association between FI mediated by SES and dental caries. Nutrition education programs targeting low-socioeconomic families are necessary as a tool to prevent dental caries in Korea.

Addressing the Bottle Necks of Global Oral Health to Tackle the Growing Epidemic of Noncommunicable Diseases

Background:

Oral health touches every aspect of our lives and still it is been taken for granted. The access and affordability to oral health care services are very limited and expensive especially in developing countries.

Objectives:

The article highlights the importance of global oral health and how it can tackle the growing noncommunicable diseases (NCDs) epidemic. Dental caries remains a significant problem even among the developed nations affecting 60% to 70 % of the children. Oral cancers, Qat chewing, craniofacial anomalies, and dental trauma contribute significantly to the global burden of diseases. Despite the magnitude of oral illness, there is neglect in global oral health, resulting in lack of combined action and support within the arena.

Conclusions:

Oral conditions share many common risk factors with NCDs and are also affected by similar social determinants. The Political Declaration of the High-level Meeting on the prevention and control of NCDs recognizes that oral diseases pose a significant burden for many countries and these diseases also share common risk factors of NCDs and can benefit from the multisectoral and multipronged approaches to NCDs. To address the existing inequities and inequalities in oral health care services globally, it is vital to ensure coverage for the poor and disadvantaged populations.

Recommendations:

There is a great need to develop some measurable oral health goals for global comparison in order to track, reduce oral disease burden, and to promote good oral health thereby advancing global public health.

Dental caries prevention strategies among children and adolescents with immigrant - or low socioeconomic backgrounds- do they work? A systematic review

BACKGROUND

This systematic review was designed to uncover the most reliable evidence about the effects of caries preventive strategies in children and adolescents of immigrant or low socioeconomic backgrounds.

METHODS

According to pre-determined inclusion and exclusion criteria, relevant articles focusing on underprivileged groups were electronically selected between January1995 and October 2015. The literature search was conducted in five databases; PubMed, Embase, CINAHL, SweMed+ and Cochrane Library. Accepted languages for included articles were English, German and Scandinavian languages. Abstracts and selected articles in full text were read and assessed independently by two review authors. Systematic reviews and meta-analyses were not included. Also articles with topics of water fluoridation and fluoride toothpaste were excluded, this due to all existing evidence of anti-caries effect for disadvantaged groups. The key data about the main characteristics of the study were compiled in tables and a quality grading was performed.

RESULTS

Thirty-seven articles were selected for further evaluation. Supervised toothbrushing for 5-year-old school children was found to be an effective prevention technique for use in underprivileged groups. Also a child/mother approach, targeting nutrition and broad oral health education of mothers showed effectiveness. For older children, a slow-release fluoride device and application of acidulated phosphate fluoride (APF) gel showed to be effective.

CONCLUSION

On the basis of this review, we maintain that in addition to studies of water fluoridation and fluoride toothpaste, there are other preventive intervention studies providing scientific evidence for caries reduction among children and adolescents with immigrant or low socioeconomic backgrounds.

Tooth loss, swallowing dysfunction and mortality in Japanese older adults receiving home care services

AIM

Severe tooth loss and swallowing dysfunction occur more frequently in dependent older adult populations. Poor oral health and functional status are expected to have a negative impact on general health. We examined whether mortality is related to the number of teeth and swallowing function in dependent older Japanese individuals receiving home care services.

METHODS

Older adults aged ≥65 years who were receiving home care were included. The planned follow-up period was 3 years. Baseline data on the number of teeth, swallowing function, nutritional status, cognitive ability and activities of daily living were collected.

RESULTS

A total of 259 participants (mean age 85.0 ± 7.7 years) were enrolled. The mean length of follow up was 26.2 months. Severe tooth loss (≤9 present teeth) and swallowing dysfunction were observed in 68.0% and 32.0% of the participants, respectively. Cox's proportional hazards regression model showed that participants with both ≤9 teeth and swallowing dysfunction were at a higher risk of mortality compared with those with both ≥10 teeth and normal swallowing function (hazard ratio 2.89, 95% confidence interval 1.22-6.83). A significant interaction among severe tooth loss, swallowing dysfunction and mortality risk was observed.

CONCLUSIONS

Severe tooth loss and swallowing dysfunction were associated with increased mortality. The present study suggests that the maintenance of oral health and swallowing function has a positive effect on general health. Therefore, attention should be given to both tooth loss and swallowing function in dependent older adult populations. Geriatr Gerontol Int 2018; 18: 873-880.

Social capital and oral health: The association of social capital with edentulism and chewing ability in the rural elderly

OBJECTIVE

The association between social capital and oral health had been reported in various ways, but still remains unclear. We investigated the association between the social capital of the elderly living in a rural region and their edentulism and chewing ability.

METHODS

A total of 241 elderly aged≥70years living in a rural city of Korea participated in this cross-sectional study. Their social capital was surveyed by questionnaire assessing its network and trust dimensions. Their edentulism and chewing ability were assessed by oral examination and chewing gum whose color changes based on the mastication performance.

RESULTS

The mean age of the participants was 82.7 (ranged 71 to 101) years and 68.8% of them were female. In the binomial regression analysis, the general network aspect of the network dimension was significantly associated with chewing ability, of which the prevalence ratio was 1.88 (95% CI: 1.16-3.06) in the age, sex, education and marital status-adjusted model.

CONCLUSION

Our findings suggest that social capital, such as a poor social network, is associated with poor chewing ability in the elderly living in rural areas.

Trends in socioeconomic inequalities in oral health among 15-year-old Danish adolescents during 1995-2013: A nationwide, register-based, repeated cross-sectional study

BACKGROUND

Scandinavian welfare states, despite having better population oral health than less egalitarian societies, are characterized by ubiquitous social gradients and large relative socioeconomic inequalities in oral health. However, trends in these inequalities among Scandinavian children and adolescents have not been studied in detail.

OBJECTIVES

To describe the associations between socioeconomic position (SEP) and oral health in adolescents and to investigate the trends in these associations between 1995 and 2013.

METHODS

Nationwide repeated cross-sectional studies (using individual-level data) were conducted on 15-year-olds in Denmark from 1995, 2003, and 2013 (N=154,750). Dental data were obtained from the national dental register of the Danish Health Authority (Sundhedsstyrelsens Centrale Odontologiske Register [SCOR]) and data on social variables from administrative registers at Statistics Denmark. SEP measures included previous year's parental education (highest attained educational level by either of the parents), income (equivalized household disposable income), and occupational social class (highest recorded occupational class between the parents). Covariates were immigration status, country of origin, number of children and persons in the family, and household type. The outcome was dental caries experience, represented by the decayed, missing, and filled surfaces (DMFS) index. Negative binomial regression models were used to examine the association between DMFS count and each of the explanatory variables separately while accounting for cluster-correlated family data. Furthermore, hierarchical multiple regressions of DMFS on SEP indicators-using the zero-inflated negative binomial (ZINB) distribution as the outcome distribution-were estimated while successively adjusting for the potential effects of the included covariates.

RESULTS

Caries prevalence declined from 71% in 1995 to 63% in 2003 and 45% in 2013. Separate assessment of each covariate showed statistically significant graded associations between each covariate and DMFS count at all time points. Similarly, in the ZINB models, in all 3 years, clear gradients were observed in terms of caries differentials in all three SEP categories, with statistically significant associations (Type 3 P values, <.0001) even after adjustment for all other covariates. For instance, in 2013, even among adolescents with positive caries experience, being of lower occupational social class was associated with up to 2.4-fold (95% confidence interval [CI]: 2.2-2.6) higher caries experience. Between 1995 and 2013, relative inequalities increased in all SEP categories, while absolute inequalities decreased in the education and occupation categories.

CONCLUSION

Considerable progress has been made in reducing dental caries rates among Danish adolescents; however, this progress has benefited the disadvantaged social groups less than the better-off groups.

Trajectory of social inequalities in the treatment of dental caries among preschool children in Japan

OBJECTIVES

The longitudinal trend of dental health inequalities among preschool children has not been described. In this study, we aimed to measure the trajectory of both relative and absolute inequalities in caries treatment among preschool children in Japan.

METHODS

We used data from the Longitudinal Survey of Babies in the 21st Century (LSB21), which is an ongoing national representative longitudinal study. The target population was families residing in Japan with newborn baby/babies born between 10 January and 17 January or 10 July and 17 July 2001. Data regarding caries treatment history and socioeconomic status (SES) were collected using a self-reported questionnaire. SES was assessed on the basis of the parents' educational attainment. In total, 35 260 children were followed from 2.5 to 5.5 years through annual surveys. To evaluate absolute and relative inequalities, we calculated the slope index of inequality (SII) and relative index of inequality (RII), respectively.

RESULTS

The rate of caries treatment at the age of 2.5 years was <10% for all SES groups; this increased to more than 30% at 5.5 years of age. Children with lower SES received more frequent caries treatment, and both absolute and relative social inequalities were statistically significant. SII showed a significant increase throughout the follow-up period, with values of 4.13% (95% confidence interval [CI], 3.16; 5.09) and 15.50% (95% CI, 13.68; 17.32) at 2.5 and 5.5 years of age, respectively. In contrast, RII decreased with an increase in the treatment rate for all groups, with values of 1.83 (95% CI, 1.59; 2.11) and 1.53 (95% CI, 1.46; 1.61) at 2.5 and 5.5 years of age, respectively.

CONCLUSION

Our results suggest that the rate of caries treatment is higher for preschool children with lower SES in Japan, with significant widening of absolute inequalities along with the growth of the children.

Socioeconomic inequalities in dental health among middle-aged adults and the role of behavioral and psychosocial factors: evidence from the Spanish National Health Survey

BACKGROUND

The goal of this analysis was to describe socioeconomic inequalities in dental health among Spanish middle-aged adults, and the role of behavioral and psychosocial factors in explaining these inequalities.

METHODS

This cross-sectional study used survey data from the 2006 Spanish National Health Survey and focused on adults ages 30 - 64. The outcome was dental health status based on the presence of self-reported dental problems. We used education, income, and occupational class as indicators of socioeconomic position and applied logistic regression analysis to estimate associations. We included behavioral and psychosocial variables in the models and compared non-adjusted to adjusted estimates to assess their potential role in explaining socioeconomic gradients.

RESULTS

Results showed clear socioeconomic gradients in dental health among middle-aged adults. The percentage of people who reported more dental problems increased among those with lower levels of education, income, and occupation. These gradients were statistically significant (p < .001). Logistic regression showed that groups with lower education, income, and occupation had higher odds of reporting the outcome (p < .001). Associations were stronger when considering education as the indicator of socioeconomic position. Substantial unexplained associations remained significant after adjusting the model by behavioral and psychosocial variables.

CONCLUSIONS

This study shows significant socioeconomic gradients in dental health among middle-aged adults in Spain. Behavioral and psychosocial variables were insufficient to explain the inequalities described, suggesting the intervention of other factors. Further research should incorporate additional explanations to better understand and comprehensively address socioeconomic inequalities in dental health.

Socioeconomic inequalities in self-perceived oral health among adults in Chile

BACKGROUND

This paper studies the socioeconomic disparities in self-perceived oral health among Chilean adults and in the perceived physical, functional, psychological and social consequences of oral health.

METHODS

In February 2011, 1,413 residents of Metropolitan Area of Santiago, Chile, were interviewed using a standardized questionnaire and examined by dentists for dental status and oral health conditions. Only adults 18 to 60 years old affiliated with the public healthcare system were eligible to participate. We estimate socioeconomic gradients in self-perceived oral health and its distinct dimensions. We use the Heckman two-step procedure to control for selection bias given the non-random nature of the sample. In addition, we use a two-equation ordered response model given the discrete nature of the dependent variable.

RESULTS

There is a non-linear socioeconomic gradient in self-perceived oral health even after controlling for oral health status. The gradient is steep at the lower end of the income distribution and constant at mid-income levels. These socioeconomic disparities are also found for the psychological and social dimensions of self-perceived oral health, but not for the functional limitations and physical pain dimensions.

CONCLUSIONS

The findings are consistent with inequities in the access to oral health services due to insufficient provision in the public sector and costly options in the private sector.

Preventive dental visiting: a critical interpretive synthesis of theory explaining how inequalities arise

BACKGROUND

In many countries, those with lower socioeconomic status are disproportionately affected by poor oral health. This can be attributed, at least in part, to differences in preventive dental visiting. While several theories have been applied to the area, they generally fail to capture the recursive nature of dental visiting behaviour, and fall short of informing the design of complex interventions to tackle inequalities.

OBJECTIVE

To undertake a systematic review and synthesis of theory in order to provide an overview of the pathways which bring about socioeconomic inequalities in early dental visiting, and identify possible intervention points.

METHODS

Electronic searching identified 8947 titles and abstracts. Paper screening and citation snowballing left 77 included papers. Drawing on the tenets of Critical Interpretive Synthesis, data extraction involved capturing concepts and relationships and translating these sometimes into synthetic constructs.

RESULTS

We theorize that at the individual (micro-level), dental visiting behaviour is influenced by: the 'Importance of obtaining care', 'Emotional response' and 'Perceived control', which feed into a balancing of 'Competing Demands' against 'Internal resources' (coping, self-identity), although attendance is tempered by the effective 'Affordability and Availability of services'. Positive Care experiences are theorized to lower the demands and increase internal resources associated with dental visiting. We also outline meso-level factors 'Social norms and sanctions', 'Obligations, expectations and trust', 'Information channels', 'Social structures' and theorize how these can exert an overwhelming influence in deprived areas.

CONCLUSIONS

Socioeconomic inequalities in early dental visiting emerge from several stages in the care-seeking process. Dental visiting behaviour should be viewed not just as a one-off event, but extending over time and social space. Since there is recursivity in peoples' most recent dental experience any future visits we identify that interventions which make care a positive experience for low socioeconomic patients may be particularly beneficial in reducing inequalities.