Life-course epidemiology: concepts and theoretical models and its relevance to chronic oral conditions

Identification of Swedish caries active individuals aged 30-90 years using a life course perspective and SKaPa longitudinal national registry data over a 10-year period

OBJECTIVE

To describe the occurrence of caries disease from a life course perspective using longitudinal data from the Swedish Quality Registry for Caries and Periodontal Disease (SKaPa).  Material and Methods: Data from seven age cohorts (ages 30-90 years), each followed over 10 years, were retrieved from the SKaPa. Using a three-trajectory model, individuals were divided into three trajectories according to their caries development over time: high (15%), moderate (45%), or low (40%). Caries experience was expressed as the mean decayed, missing, and filled surfaces (DMFS) index.

RESULTS

Significant differences were found for all three trajectories and in all age groups over the 10 years. The mean DMFS index increase was significantly larger for the high trajectory group than for the moderate and low trajectory groups across all age cohorts. An increase in caries experience was observed for the older cohorts across all trajectories.

CONCLUSIONS

A three-trajectory model appears useful for identifying and quantifying caries experiences in longitudinal studies. Increased caries disease occurs over time, especially in the highest trajectory group and among older cohorts. These findings emphasise the need for greater attention and more efficient caries prevention methods.

Validity of claims-based definition of number of remaining teeth in Japan: Results from the Longevity Improvement and Fair Evidence Study

BACKGROUND

Secondary healthcare data use has been increasing in the dental research field. The validity of the number of remaining teeth assessed from Japanese dental claims data has been reported in several studies, but has not been tested in the general population in Japan.

OBJECTIVES

To evaluate the validity of the number of remaining teeth assessed from Japanese dental claims data and assess its predictability against subsequent health deterioration.

METHODS

We used the claims data of residents of a municipality that implemented oral health screening programs. Using the number of teeth in the screening records as the reference standard, we assessed the validity of the claims-based number of teeth by calculating the mean differences. In addition, we assessed the association between the claims-based number of teeth and pneumococcal disease (PD) or Alzheimer's disease (AD) in adults aged ≥65 years using Cox proportional hazards analyses.

RESULTS

Of the 10,154 participants, the mean number of teeth assessed from the claims data was 20.9, that in the screening records was 20.5, and their mean difference was 0.5. During the 3-year follow-up, PD or AD onset was observed in 10.4% (3,212/30,838) and 5.3% (1,589/30,207) of participants, respectively. Compared with participants with ≥20 teeth, those with 1-9 teeth had a 1.29 (95% confidence interval [CI]: 1.17-1.43) or 1.19 (95% CI: 1.04-1.36) times higher risk of developing PD or AD, respectively.

CONCLUSION

High validity of the claims-based number of teeth was observed. In addition, the claims-based number of teeth was associated with the risk of PD and AD.

Impact of dental visiting patterns on oral health: A systematic review of longitudinal studies

AIM

To systematically review longitudinal studies investigating the impact of dental visiting patterns on oral health across the life course.

METHODS

Five databases (MEDLINE, Embase, Scopus, Web of Science, CINAHL) were searched up to March 2023. Results were screened based on eligibility criteria in a two-stage process: title and abstract, and full-text review. A backward search of reference lists and a forward search of citations of the included papers was also conducted. The quality of the included papers was assessed using the Newcastle-Ottawa Scale. Key study information was extracted and a narrative synthesis of the findings was performed.

RESULTS

Eleven papers from five longitudinal studies in five countries (Australia, Brazil, China, New Zealand, Sweden) met the inclusion criteria. Studies of moderate to high quality consistently reported that regular dental attendance was associated with having less dental caries experience, fewer missing teeth and better oral health-related quality of life. Inconsistent findings were observed for decayed teeth, and no association was found for periodontal condition.

CONCLUSIONS

This review highlights an association between regular dental visiting pattern and improved oral health, notably less dental caries experience and better oral health-related quality of life. Dental attendance emerges as an important predictor of oral health across the life course, underscoring the importance of routine dental care.

REGISTRATION INFORMATION

The PROSPERO registration number is CRD42023396380.

Prevalence, and Risk Indicators of Coronal and Root Caries in Mexican Older Adults in Nursing Homes

Background

Several factors are associated with coronal and root caries in older persons. The purpose of this study was to determine the experience, prevalence, and risk indicators (socioeconomic, sociodemographic, and dental variables) of coronal and root caries in older persons residing in nursing homes in Mexico.

Methods

A cross-sectional study was carried out in 227 dentate participants with natural teeth. Convenience sample, where all dentate residents were invited to participate. The dependent variables were coronal caries and root caries, which were determined through an oral clinical examination. The independent variables were sociodemographic factors, location, type of center, surfaces free of dental biofilm and calculus, surfaces with recession, retainers in contact with surfaces with recession, xerostomia, smoking, and the previous use of dental services. The binary logistic regression model was used in the analysis.

Results

The mean age of the participants in this study was 77.7±8.8 years, and 69.2% were women. Moreover, 71.8% live in long-term care facilities, and 48.0% live in Mexico City. The prevalence of coronal and root caries was found to be 67.8% and 50.7%, respectively. Being male and living in Mexico City were risk indicators for coronal caries, and with a 1% increase in surfaces with no biofilm, the risk decreased by 2%. Being widowed, having government or no social security, denture retainers, and coronal caries were risk indicators for root caries, while the utilization of dental services indicated lower risk.

Conclusion

Several variables that differ in nature were found to be risk indicators for coronal and root caries. Coronal caries increases the risk of root caries. Prevention should be aimed at identifying persons at higher risk, and dental care should be improved for persons living in long-term care institutions.

Is childhood oral health the 'canary in the coal mine' for poor adult general health? Findings from two New Zealand birth cohort studies

OBJECTIVES

This study aimed to investigate whether childhood dental caries was associated with self-reported general health in midlife.

METHODS

We used data on childhood oral health (caries experience) and adult self-reported general health from two New Zealand longitudinal birth cohorts, the Dunedin Multidisciplinary Health and Development Study (n = 922 and n = 931 at ages 5 and 45 years, respectively), and the Christchurch Health and Development Study (n = 1048 and n = 904 at ages 5 and 40 years, respectively). We used generalized estimating equations to examine associations between age-5 dental caries and self-rated general health and the number of self-reported physical health conditions at ages 45/40 (diagnosed by a doctor or health professional, n = 14 conditions among both cohorts). Covariates included known risk factors for poor health (SES, IQ, perinatal complications), and personality style, which is known to affect subjective health ratings.

RESULTS

Incidence rate ratios for 'Excellent' self-rated health were lower among those who had high experience of dental caries as children than those who had not in both, the Dunedin (IRR, 0.76; 95% CI, 0.50, 1.14) and Christchurch studies (IRR, 0.69; 95% CI, 0.47, 1.00). Childhood dental caries was not associated with the number of self-reported physical health conditions in midlife, in either cohort. Dunedin Study members who at age 5 were not caries-free or whose parents rated their own or their child's oral health as poor were less likely to report 'Excellent' self-rated general health at age 45 than those who were caries-free and whose parents did not give a 'poor' rating (IRR, 0.69; 95% CI, 0.49, 0.97).

CONCLUSIONS

Five-year-olds with greater caries experience were more likely to have poorer self-rated general health by midlife. Beyond this longitudinal association, future research should examine whether childhood dental caries is associated with objective/biological markers of physical health and whether it may have utility as an early indicator for poor general health in adulthood.

Development, validation, and usability testing of prototype mobile application for oral health promotion during pregnancy in India

Background

Oral diseases are a silent epidemic.

Objectives

The objectives of the study were to develop, validate, and assess the usability of an oral health prototype mobile application for oral health promotion among pregnant women in India.

Materials and Methods

A cross-sectional study was conducted in Tertiary Care Hospital in Delhi, India, after obtaining Ethical Clearance from the Institutional Ethical Committee Board. The study was conducted in three phases: development of the prototype app, its validation, followed by usability testing of the app. Mobile app was validated by 30 pregnant women and 30 subject experts using Heuristic Analysis Scale and usability testing by 30 pregnant women based on System Usability Scale (SUS). Data were analyzed with IBM SPSS version 21.0.

Results

Majority (over 90%) of pregnant women and subject experts strongly acknowledged that the app educated the users using positive motivation strategies, instilling comprehensive knowledge and faced no issues with the appropriate functionality of the app. The prototype app scored 73.75 on SUS, indicating high usability.

Conclusion

This study holistically explored various dimensions of oral health care in pregnant women. Its novelty is proven by the fact that the content of the prototype application has been phase wise developed and validated by pregnant women and subject experts. Usability testing of the app indicated its high acceptability and ease of use among pregnant women in India.

Adverse Childhood Experiences and Oral Health Conditions Among Middle-aged and Older Chinese Adults: Exploring the Moderating Roles of Education and Gender

This study aims to examine whether adverse childhood experiences (ACEs) are associated with oral health conditions (denture use, difficulty in chewing, and edentulism) among middle-aged and older adults in China and if gender and adulthood education moderate the associations. Data were obtained from the 2014 and 2018 surveys from the China Health and Retirement Longitudinal Study (N = 17,091) and logistic regressions were carried out. Results show that childhood hunger (OR = 1.12), loneliness (OR = 1.10) and family relations (OR = 1.07) were significantly associated with higher odds of denture use and there were significant associations between hunger (OR = 1.16) and difficulty in chewing. For the female subsample, education significantly moderated the adverse effect of childhood hunger on denture use and difficulty in chewing. Findings suggest that ACEs have long-lasting impacts on oral health conditions in later life and adulthood education might offer critical resources for females, helping them buffer the detrimental health impacts of ACEs.

Observational studies in Alzheimer disease: bridging preclinical studies and clinical trials

Recent high-profile failures of Alzheimer disease treatments at the clinical trial stage have led to renewed efforts to identify and test novel interventions for Alzheimer disease and related dementias (ADRD). In this Perspective, we highlight the importance of including well-designed observational studies as part of these efforts. Observational research is an important cornerstone for gathering evidence on risk factors and causes of ADRD; this evidence can then be combined with data from preclinical studies and randomized controlled trials to inform the development of effective interventions. Observational study designs can be particularly beneficial for hypothesis generation, posing questions that are unethical or impractical for a trial setting, studying life-course associations, research in populations typically not included in trials, and public health surveillance. Here, we discuss each of these situations in the specific context of ADRD research. We also highlight novel approaches to enhance causal inference and provide a timely discussion on how observational epidemiological studies help provide a bridge between preclinical studies and successful interventions for ADRD.

Social Epigenomics: Conceptualizations and Considerations for Oral Health

Advances in high-throughput technologies and the generation of multiomics, such as genomic, epigenomic, transcriptomic, and metabolomic data, are paving the way for the biological risk stratification and prediction of oral diseases. When integrated with electronic health records, survey, census, and/or epidemiologic data, multiomics are anticipated to facilitate data-driven precision oral health, or the delivery of the right oral health intervention to the right individuals/populations at the right time. Meanwhile, multiomics may be modified by a multitude of social exposures, cumulatively along the life course and at various time points from conception onward, also referred to as the socio-exposome. For example, adverse exposures, such as precarious social and living conditions and related psychosocial stress among others, have been linked to specific genes being switched "on and off" through epigenetic mechanisms. These in turn are associated with various health conditions in different age groups and populations. This article argues that considering the impact of the socio-exposome in the biological profiling for precision oral health applications is necessary to ensure that definitions of biological risk do not override social ones. To facilitate the uptake of the socio-exposome in multiomics oral health studies and subsequent interventions, 3 pertinent facets are discussed. First, a summary of the epigenetic landscape of oral health is presented. Next, findings from the nondental literature are drawn on to elaborate the pathways and mechanisms that link the socio-exposome with gene expression-or the biological embedding of social experiences through epigenetics. Then, methodological considerations for implementing social epigenomics into oral health research are highlighted, with emphasis on the implications for study design and interpretation. The article concludes by shedding light on some of the current and prospective opportunities for social epigenomics research applied to the study of life course oral epidemiology.

Occupational Difference in Oral Health Status and Behaviors in Japanese Workers: A Literature Review

The occupational environment is an important factor for oral health because people spend a long time in the workplace throughout their lives and are affected by work-related stress and occupational health policies. This study aimed to review evidence for the association between occupation and oral health status and behaviors. A literature search of PubMed was conducted from February to May 2022, as well as a manual search analyzing the article origins. Articles were screened and considered eligible if they met the following criteria: (1) published in English; (2) epidemiological studies on humans; and (3) examined the association between occupation and oral health status and behaviors. All 23 articles identified met the eligibility criteria. After full-text assessments, ten articles from Japan were included in this review: four on the association between occupation and dental caries, three on occupation and periodontal disease, two on occupation and tooth loss, and one on occupation and oral health behaviors. An association was apparent between occupation, oral health status and behaviors among Japanese workers. In particular, skilled workers, salespersons, and drivers who work longer hours and often on nightshifts, tended to have poor oral health.

Influence of toothache on oral health-related quality of life during adolescence: a cohort study

OBJECTIVES

This study aims to evaluate the influence of toothache in early adolescence on oral health-related quality of life (OHRQoL) on later adolescence.

MATERIALS AND METHODS

A longitudinal study was conducted, starting in 2012 within a random sample of 1,134 adolescents of 12-year-olds, in Santa Maria, Brazil. Clinical, socioeconomic, demographic, and subjective variables were obtained. Toothache was collected through the question "In the last 6 months, did you have toothache?" Six years later, the same adolescents answered the short form of the Child Perceptions Questionnaire (CPQ11-14). Multilevel Poisson regression was used to evaluate the association between toothache at baseline (2012) with overall and domain-specific CPQ11-14 scores at follow-up (2018).

RESULTS

A total of 769 adolescents were revaluated in 2018 (68% rate retention), with a mean age of 17.5 years (SD, 0.64). Adolescents who reported toothache at the baseline presented a had a higher mean score in the overall CPQ questionnaire during follow-up (Incidence rate ratio (IRR) = 1.25; 95% CI 1.20-1.31). Toothache was also associated with all domain-specific CPQ11-14 even after adjusting the other variables.

CONCLUSIONS

Brazilian adolescents who had toothache in early adolescence, even if only a single episode, have a negative impact on OHRQoL throughout adolescence.

CLINICAL RELEVANCE

These findings serve as a warning for dental professionals to dedicate their preventive approaches and to promote healthy standards in this age group, in order to avoid episodes of toothache and negative impact on OHRQoL.

A cross-sectional analysis of oral health care spending over the life span in commercial- and Medicaid-insured populations

BACKGROUND

Life course theory creates a better framework to understand how oral health care needs and challenges align with specific phases of the life span, care models, social programs, and changes in policy.

METHODS

The authors obtained data from the 2018 IBM Watson Multi-State Medicaid MarketScan Database (31 million claims) and the 2018 IBM Watson Dental Commercial and Medicare Supplemental Claims Database (45 million claims). The authors conducted analysis comparing per enrollee spending on fee-for-service dental claims and medical spending on oral health care for patients from ages 0 through 89 years.

RESULTS

Oral health care use rate and spending are lower during the first 4 years of life and in young adulthood than in other periods of life. Stark differences in the timing, impact, and severity of caries, periodontal disease, and oral cancer are seen between those enrolled in Medicaid and commercial dental plans. Early childhood caries and oral cancer occur more frequently and at younger ages in Medicaid populations.

CONCLUSIONS

This life span analysis of the US multipayer oral health care system shows the complexities of the current dental service environment and a lack of equitable access to oral health care.

PRACTICAL IMPLICATIONS

Health policies should be focused on optimizing care delivery to provide effective preventive care at specific stages of the life span.

Dental caries and psychosocial factors: Testing a conceptual model in adolescents

OBJECTIVES

A conceptual model was designed to examine interrelations among psychosocial factors, oral health behaviour, and dental caries in a sample of adolescents.

METHODS

This cross-sectional study design of 531 Greek families included an oral examination and a survey completed by adolescents, and a survey completed by mothers. The outcome measure was dental caries experience. Additionally, dental sealants were recorded. The participants provided information which comprised the Sense of Coherence (SoC) scale and 11 psychosocial and behavioural variables that formed 6 composite variables (life-course experiences, socio-economic status, perceived parental support, perceived parental punishment, preventive measures, sugar intake frequency). The composite variables of preventive measures and sugar intake formed the latent variable of oral health behaviour. The interrelations of the above factors were included in a conceptual model and tested using a Structural Equation Modelling analysis.

RESULTS

Data fit the proposed conceptual model (χ²  = 23.338, df = 14, P = .055, RMSEA = 0.036). Among psychosocial variables, adolescent's SoC was the best predictor of both dental caries (Standardized Regression Coefficient - Std. RC ± Standard Error (SE) = -0.178 ± 0.04) and oral health behaviour (Std. RC ± SE = -0.378 ± 0.09). All psychosocial factors were associated with SoC (Std. RCs ± SE between -0.162 ± 0.04 and 0.211 ± 0.04) and via SoC with oral health behaviour (Std. RCs ± SE between -0.080 ± 0.03 and 0.061 ± 0.02).

CONCLUSIONS

A conceptual model was tested that integrated SoC with the psychosocial factors theoretically shaping it and clarified all factors' predictive abilities on dental caries via oral health behaviour.

Effectiveness of Alcohol-free Mouth Rinse Containing Essential Oils and Fluoride as an Oral Hygiene Adjunct among Pregnant Thai Women: A Randomized Clinical Trial

Aim:

This 3-month, double-blind, two-center, parallel, randomized controlled clinical trial compared the improvement of oral hygiene status from alcohol-free essential oils (EO) with 0.05% fluoride mouthwash to the control (0.05% fluoride mouthwash).

Materials and Methods:

One hundred and fifty-four pregnant women were clinically examined to determine Modified Gingival Index (MGI), Plaque Index (PI), and Winkel Tongue Coating Index (WTCI) at baseline, 2 weeks, and 3 months by calibrated examiners. After supragingival scaling and provision of a tooth brushing method, participants were randomly assigned to daily use of alcohol-free EO or the control rinse for 30s at bedtime. Repeated measures of analysis of variance (ANOVA) were performed to assess the effectiveness of alcohol-free EO with 0.05% fluoride mouthwash on MGI, PI, and WTCI scores.

Results:

One hundred and forty subjects completed the study. The dropout rate of 9.1% (n = 14) was mainly due to loss of follow-up. At baseline, no significant differences were observed between the intervention and the control groups for MGI (1.19±0.57 vs. 1.11±0.48, P = 0.371), PI (1.53±0.56 vs. 1.47±0.48, P = 0.439), and WTCI (0.88±0.48 vs. 0.88±0.50, P = 0.990). There was a statistically significant reduction of MGI, PI, and WTCI scores over time (P < 0.001). However, no significant differences were observed for between-group comparisons for all measured indices at any time point. No adverse effect was reported in either group.

Conclusion:

At the end of 3-month period, improvement of oral hygiene of pregnancy women in this study was evidence. However, the use of alcohol-free EO mouthwash as supplements to the daily oral hygiene did not provide a significant improvement in terms of plaque, gingival, and tongue coating indices.

Determinants of dental prosthetic treatment need: A birth cohort study

OBJECTIVES

To estimate the incidence of the need for a dental prosthesis during early adulthood and its association with socioeconomic and oral disorder trajectories.

METHODS

In 1982, in the city of Pelotas, all live births (n = 5914) and their mothers were assessed. A representative sample of this cohort study was examined for oral health conditions at 15, 24 and 31 years (Oral Health Study-OHS). The need for a dental prosthesis was assessed at 24 and 31 years of age, and variables of interest (gender, skin colour, socioeconomic status (SES), use of dental services, caries and periodontal disease) were collected from different waves of this cohort. Longitudinal association between outcome and variables of interest was assessed using multilevel mixed models.

RESULTS

A total of 539 individuals were assessed in 2013 (60.7% response rate). The need for a dental prosthesis was 28.9% at 24 years. (95% CI 24.9-33.2) and 49.0% at 31 years (95% CI 44.7-53.3). Risk of presenting with a need for a dental prosthesis was higher in users of public services. Downwardly mobile and lower SES trajectory groups presented a higher risk of the need for a dental prosthesis. High-risk caries trajectory group showed a higher risk of presenting with the need for a dental prosthesis from 24 to 31 years.

CONCLUSIONS

Our findings demonstrate that the need for dental prosthesis from 24 to 31 years old was determined by trajectories of exposure during the life cycle, reinforcing that tackling socioeconomic inequalities at any stage of life can have an effect on an individual's oral health.

Dental status of young adults born with very low birthweight: A national cohort study

OBJECTIVES

Little is known about the oral health of very low birthweight (<1500 g: VLBW) young adults. This study compared the oral health and self-reported oral health in a 1986 birth cohort of VLBW young adults with that of term-born controls.

METHODS

Oral health interviews and dental examinations were conducted. The dental examinations were carried out in a dental clinic using the standardized examination protocols from the 2009 New Zealand Oral Health Survey. Participants were interviewed to obtain data on self-reported oral health, oral hygiene practices, use of dental health services and oral health-related quality of life using the OHIP-14 measure.

RESULTS

Interviews were completed by 250 VLBW participants and 226 (90.4%) of those underwent the dental examination. All 100 controls completed both the interview and dental examination. While there were few overall differences in clinical or self-reported oral health between the VLBW or control groups, proportionally fewer VLBW participants attended the dentist for regular check-ups or cleaned between their teeth than controls. The VLBW and controls did not differ in the prevalence of untreated dental caries or in the number of carious tooth surfaces after adjusting for confounders. However, participants in the control group had more teeth that had been restored due to caries (4.4 teeth) than did the VLBW group (3.4 teeth, P = .045), after adjusting for confounding.

CONCLUSIONS

Very low birthweight young adults showed poorer self-care than the control group when it came to oral health; they were less likely to regularly attend dental visits, had poorer oral hygiene and were less likely to have had their dental disease treated. VLBW young adults should be encouraged to attend regular dental check-up appointments and to carry out effective home oral hygiene care.

Caries experience among children born after a complicated pregnancy

Objectives

Behavioural and lifestyle factors, as oral hygiene and diet, are well‐established risk factors in the pathogenesis of dental caries, though displaying large differences in susceptibility across individuals. Since enamel formation already starts in utero, pregnancy course and outcome may eventually play a role in enamel strength and caries susceptibility. Therefore, we studied the association between history of pregnancy complications and the caries experience in their six‐year‐old children. The pregnancy complications included small for gestational age (SGA), spontaneous preterm birth (sPTB), gestational hypertension (GH), pre‐eclampsia (PE), individually, and a combination of those, designated as placental syndrome.

Methods

This study was embedded in Generation R, a prospective longitudinal Dutch multiethnic pregnancy cohort study. Information about pregnancy complications was obtained from questionnaires completed by midwives and obstetricians with cross‐validation in medical records. These included SGA, sPTB, GH and PE. Caries experience was assessed with the decayed, missing and filled teeth (dmft) index at a mean age of six years. The association between dental caries experience and a history of pregnancy complications was studied by using hurdle negative binomial (HNB) models.

Results

We were able to assess the dmft index in 5323 six‐year‐old children (mean age 6.2 years, SD 0.5). We did not find an association between the different pregnancy complications and dental caries experience in childhood, whether for SGA, sPTB, GH, PE, or for the combined outcome placental syndrome (HNB estimates: OR 1.02, 95%CI 0.87 ‐ 1.19; RR 0.90, 95%CI 0.78 ‐ 1.04). Further adjustment of the models with different confounders did not alter the outcome.

Conclusions

Although it is expected that prenatal stress can be a risk factor for caries development later in life, our findings do not support this hypothesis. Therefore, we believe disparities in caries experience between children are probably not explained by early life events during a critical intrauterine period of development.

Prevention and management of periodontal diseases and dental caries in the older adults

As a result of aging populations, in the future, dental practitioners will be caring for more older adults than ever before. These older adults, especially in developed countries, will demand a greater number of dental services, driven by increased tooth retention and an expectation of excellent oral healthcare throughout the life course. Further, the global rise in the prevalence and incidence of chronic diseases will increase the risk and/or severity of oral diseases and add a layer of complexity to the management of oral diseases in older adults. More older adults will be at a higher risk of periodontal disease and root caries as a result of reduced tooth loss and edentulism. This article reviews information on periodontitis and root caries, oral diseases which reflect the cumulative risk of the individual, and which are best addressed through prevention. Oral healthcare providers must embrace the concept of lifelong emphasis on prevention, as well as participation as active members of a healthcare team which provides healthcare for older adults in various settings (eg, hospital/clinic-based care, community-based settings, and long-term care facilities). National guidelines that address oral health are being considered by some countries, and if these are implemented they will increase the accessibility to oral health for older adults. In parallel to this, revisions of existing older adult insurance schemes (eg, the inclusion of routine oral healthcare in the US Medicare program) would promote the maintenance of a functional dentition that is pain-free and conducive to general health. The opportunity exists to implement a holistic approach to oral health that will align oral health with general health and emphasize that true health can only be achieved with the inclusion of oral health.

Narrative review of affinities and differences between the social determinants of oral and general health in Canada: establishing a common agenda

BACKGROUND

This article overviews Canadian work on the social determinants of oral and general health noting their affinities and differences.

METHODS

A literature search identified Canadian journal articles addressing the social determinants of oral health and/or oral health inequalities. Analysis identified affinities and differences with six themes in the general social determinants of health literature.

RESULTS

While most Canadian social determinants activity focuses on physical and mental health there is a growing literature on oral health-literature reviews, empirical studies and policy analyses-with many affinities to the broader literature. In addition, since Canada provides physical and mental health services on a universal basis, but does not do so for dental care, there is a special concern with the reasons behind, and the health effects-oral, physical and mental-of the absence of publicly financed dental care.

CONCLUSIONS

The affinities between the social determinants of oral health and the broader social determinants of health literature suggests the value of establishing a common research and action agenda. This would involve collaborative research into common social determinants of oral and general health and combined policy advocacy efforts to improve Canadians' living and working conditions as means of achieving health for all.

Income at birth and tooth loss due to dental caries in adulthood: The 1982 Pelotas birth cohort

OBJECTIVE

To estimate the effect of income at birth on adulthood tooth loss due to dental caries in 539 adults from the 1982 Pelotas birth cohort.

METHODS

Family income was collected at birth. Tooth loss was clinically assessed when individuals were aged 31. Dental visit and oral hygiene at age 25 were considered mediators. Confounders included maternal skin color, and individual's skin color, sex, and income in adulthood. Marginal structural modeling was used to estimate the controlled direct effect of income at birth on tooth loss due to dental caries that was neither mediated by the use of dental service nor oral hygiene.

RESULTS

Forty-three percent of the individuals of low income at birth lost one/two teeth, and 23% lost three or more; among those non-poor, the prevalence was 30% and 14%, respectively. Poor individuals at birth had a 70% higher risk for missing teeth in adulthood than those non-poor. The risk of losing one/two (risk ratio 1.68) and three or more teeth (risk ratio 3.84) was also higher among those of low income at birth.

CONCLUSIONS

Economic disadvantage at birth had an effect on tooth loss due to dental caries at age 31 not mediated by individual risk factors.

Does the Association between Guardians' Sense of Coherence and their Children's Untreated Caries Differ According to Socioeconomic Status?

Untreated caries is the most prevalent disease in the world. A sense of coherence (SOC) is believed to contribute to oral health. We aimed to clarify the association between guardians' SOC and their children's caries based on socioeconomic status (SES) in Japan. This study's subjects were Japanese public junior high schoolers (N = 1730), aged 12-15, and their guardians in Kosai City. We administered a questionnaire survey among guardians in 2016 to assess their SOC and family environment. With their students' consent, public junior high schools shared the results of the dental examinations that were part of their school physicals. Multivariate logistic regression was conducted to clarify the association between guardians' SOC and their children's untreated decayed permanent teeth. We also conducted a stratified analysis according to a relative poverty line. We observed in the multivariate regression a significant inverse association between children's untreated decay and their guardians' SOC (OR 0.93, 95%CI 0.87-1.00). The association of SOC was stronger in the low economic group (OR 0.64, 95%CI 0.43-0.95). Guardians with higher SOC were associated with children having fewer caries. Guardians' SOC is a factor for the prevalence of caries and access to dental care, especially among children with low economic status.

Prenatal Substance Use Disorders and Dental Caries in Children

Substance use is common in women of reproductive age, but limited data exist on the dental health of their children, including risk of caries. We conducted a longitudinal cohort study of 790,758 infants born between 2006 and 2016 in Quebec, Canada. We identified women with substance use disorders before or during pregnancy. The main outcome measure was hospitalization for dental caries in offspring up to 12 y after birth. We estimated hazard ratios (HRs) with 95% confidence intervals (CIs) for the association of maternal substance use with pediatric dental caries, adjusted for potential confounders. Children exposed to maternal substance use had a higher incidence of hospitalization for dental caries than unexposed children (105.2 vs. 27.0 per 10,000 person-years). Maternal substance use was associated with 1.96 times the risk of childhood dental caries (95% CI, 1.80-2.14), including a greater risk of caries of enamel, dentin, or cementum (HR, 2.00; 95% CI, 1.82-2.19) and dental pulp (HR, 2.36; 95% CI, 2.07-2.70), relative to no substance use. Associations were elevated for alcohol (HR, 2.31; 95% CI, 2.03-2.64) but were also present for cocaine, cannabis, opioids, and other substances. Substance use during pregnancy was more strongly associated with dental caries hospitalization than prepregnancy substance use. Associations were stronger in early childhood. Maternal substance use is associated with the future risk of dental caries hospitalization in children. Targeting substance use early in the lives of women may contribute to dental caries prevention in offspring.

Socioeconomic disadvantage across the life-course and oral health in older age: findings from a longitudinal study of older British men

Background

The influence of life-course socioeconomic disadvantage on oral health at older ages is not well-established. We examined the influence of socioeconomic factors in childhood, middle-age and older age on oral health at older ages, and tested conceptual life-course models (sensitive period, accumulation of risk, social mobility) to determine which best described observed associations.

Methods

A representative cohort of British men aged 71-92 in 2010-12 included socioeconomic factors in childhood, middle-age and older age. Oral health assessment at 71-92 years (n = 1622) included tooth count, periodontal disease and self-rated oral health (excellent/good, fair/poor) (n = 2147). Life-course models (adjusted for age and town of residence) were compared with a saturated model using Likelihood-ratio tests.

Results

Socioeconomic disadvantage in childhood, middle-age and older age was associated with complete tooth loss at 71-92 years-age and town adjusted odds ratios (95% CI) were 1.39 (1.02-1.90), 2.26 (1.70-3.01), 1.83 (1.35-2.49), respectively. Socioeconomic disadvantage in childhood and middle-age was associated with poor self-rated oral health; adjusted odds ratios (95% CI) were 1.48 (1.19-1.85) and 1.45 (1.18-1.78), respectively. A sensitive period for socioeconomic disadvantage in middle-age provided the best model fit for tooth loss, while accumulation of risk model was the strongest for poor self-rated oral health. None of the life-course models were significant for periodontal disease measures.

Conclusion

Socioeconomic disadvantage in middle-age has a particularly strong influence on tooth loss in older age. Poor self-rated oral health in older age is influenced by socioeconomic disadvantage across the life-course. Addressing socioeconomic factors in middle and older ages are likely to be important for better oral health in later life.

Effect decomposition through multiple causally nonordered mediators in the presence of exposure-induced mediator-outcome confounding

Avin et al (2005) showed that, in the presence of exposure-induced mediator-outcome confounding, decomposing the total causal effect (TCE) using standard conditional exchangeability assumptions is not possible even under a nonparametric structural equation model with all confounders observed. Subsequent research has investigated the assumptions required for such a decomposition to be identifiable and estimable from observed data. One approach was proposed by VanderWeele et al (2014). They decomposed the TCE under three different scenarios: (1) treating the mediator and the exposure-induced confounder as joint mediators; (2) generating path-specific effects albeit without distinguishing between multiple distinct paths through the exposure-induced confounder; and (3) using so-called randomised interventional analogues where sampling values from the distribution of the mediator within the levels of the exposure effectively marginalises over the exposure-induced confounder. In this paper, we extend their approach to the case where there are multiple mediators that do not influence each other directly but which are all influenced by an exposure-induced mediator-outcome confounder. We provide a motivating example and results from a simulation study based on from our work in dental epidemiology featuring the 1982 Pelotas Birth Cohort in Brazil.

Inequalities in Caries Experience Among Mongolian Children

Although inequalities in dental caries have been well-reported, there is only one Mongolian study on the association between socioeconomic status (SES) and caries experience, which was published ten years ago. This study aimed to determine the dental health status of Mongolian children living in urban and suburban areas of Ulaanbaatar city and examine its association with income and parental educational attainment. An oral examination was conducted by dentists and caries were measured as deft/DMFT indices. A questionnaire including demographic characteristics and socioeconomic status was completed by their parents or caregiver. Parental educational attainment and household income were used as the measures of SES. The relative index of inequality (RII) and slope index of inequality (SII) were employed to examine the association between SES on deft and DMFT after adjusting for covariates. Dental caries prevalence (those with deft/DMFT > 0) was 89.3% among the total number of participants. The mean deft/DMFT values for age groups 1-6, 7-12, and 13-18 were 5.83 (SD = 4.37, deft), 5.77 (SD = 3.31, deft/DMFT), and 3.59 (SD = 2.69, DMFT), respectively. Rather than residence area and parental educational attainment, significant caries experience inequality was observed in relation to income (RII 0.65 95%, CI 0.52 to 0.82, SII -2.30, 95% CI -4.16 to -0.45). A prevention strategy for lower socioeconomic groups and building integrated oral health surveillance to monitor epidemiological trends for further evaluation of its progress is necessary.

Childhood IQ predicts age-38 oral disease experience and service-use

OBJECTIVES

Given that people with higher intelligence have been shown to live longer, enjoy better health and have more favourable health behaviours, we investigated the association between childhood IQ and a range of important dental health and service-use indicators at age 38.

METHODS

Long-standing prospective study of a complete birth cohort, with childhood IQ (assessed at ages 7, 9, 11 and 13 years) used to allocate participants (N = 818) to one of four ordinal categories of childhood IQ.

RESULTS

There were distinct and consistent gradients by childhood IQ in almost all of the dental caries experience measures (with the exception of filled teeth) whereby each was most severe in the lowest child IQ category and least severe in the highest; the exception was the mean FT score, for which there was no discernible gradient. Indicators of self-care and periodontal disease experience showed similar gradients, and multivariate modelling using the continuous IQ score confirmed the observed patterns.

CONCLUSIONS

Childhood cognitive function is a key determinant of oral health and dental service-use by midlife, with those of lower cognitive capacity as children likely to have poorer oral health, less favourable oral health-related beliefs, and more detrimental self-care and dental visiting practices by age 38. There is a need to shape dental clinical services and public health interventions so that people with the poorest cognitive function do not continue to be disadvantaged.

A life course approach to total tooth loss: Testing the sensitive period, accumulation, and social mobility models in the Health and Retirement Study

OBJECTIVES

Childhood socio-economic status (SES) has long been associated with later-life oral health, suggesting that childhood is a sensitive period for oral health. Far less attention has been given to the long-term impact of childhood trauma, abuse, and smoking on later-life oral health. This study fills the gap in the literature by examining how adverse childhood experiences-social, psychological, and behavioral-shape total tooth loss over the life course, with an assessment of the sensitive period, accumulation, and social mobility models from life course research.

METHODS

Data are drawn from the 2012 Health and Retirement Study (HRS) merged with multiple HRS data sources to obtain childhood information (N = 6,427; age > 50). Adverse childhood experiences include childhood financial hardship, trauma, abuse, and smoking. Total tooth loss is measured to assess poor oral health in later life. Educational attainment and poverty status (since age 51) are measured as adult adversity. Current health conditions and health behaviors are assessed to reflect the correlates of oral health in later life.

RESULTS

The sensitive period model indicates that childhood trauma such as parental death or divorce (odds ratio [OR] = 1.37, 95% confidence interval [CI] = 1.04, 1.80), physical abuse (OR = 1.17, 95% CI = 1.03, 1.34), and low educational attainment (≤ high school; OR = 1.52, 95% CI = 1.04, 2.22) are associated with higher odds of total tooth loss in later life. Poverty status was not associated with the outcome. There was a clear graded relationship between accumulation of adverse experiences and oral health, which supports the accumulation model. In the social mobility model, older adults who occupied a stable disadvantageous position were more likely to be toothless (OR = 1.77, 95% CI = 1.08, 2.90) compared to those who did not face adversity in any case. Neither upward nor downward mobility mattered.

CONCLUSIONS

Failing oral health in older adults, especially total tooth loss, may have its roots in adverse experiences such as childhood trauma, abuse, and low educational attainment. Findings also suggest that oral health in later life may be more influenced by accumulation of adversity rather than changes in social and economic position over the life course.

Association of infant growth with emergence of permanent dentition among 12 year-aged southern Chinese school children

BACKGROUND

There is a need to comprehensively investigate the relationship between tooth eruption and infant growth to explain the theory of tooth emergence. This study aimed to investigate the association between infant growth during the first year of life and the emergence of the permanent teeth.

METHODS

A random sample of 668, 12-year-old students was recruited from a birth cohort. Erupted permanent tooth number was recorded. The association of infant growth (growth trajectories and growth rates) and permanent tooth emergence was examined through logistic regression analyses. The regression model was adjusted by potential confounders including gender, gestational age, mode of delivery, type of feeding, parental education, and health status.

RESULTS

The response rate was 76.9% (n = 514). Two hundred and forty-five (47.7%) children had all 28 permanent teeth erupted. Infants who had higher birth weight z-scores and those who had grown slowly during the first three months of life were more likely to have complete permanent teeth emergence at their 12-year-old in both unadjusted (p <  0.01) and adjusted model (adjusted for gender, gestational age, mode of delivery, type of feeding, parental education, and health status, p <  0.01). However, no significant association was found between the growth trajectories and permanent tooth emergence in either unadjusted or adjusted models (p > 0.05).

CONCLUSION

Birth weight and infant growth during the first three months of life might be associated with permanent tooth emergence at their 12 years of age. This association may be applied in the assessment of risk for dental caries or malocclusion.

Impact of Dental Diseases on Quality-Adjusted Life Expectancy in US Adults

Comparing the burden of dental conditions to other health outcomes provides useful insight for public policy. We aimed to estimate quality-adjusted life expectancy (QALE) loss due to dental conditions in the US adult population. Social inequalities in QALE loss by dental conditions were also examined. Data from 3 cross-sectional waves of the National Health and Nutrition Examination Survey (NHANES waves 2001 to 2002, 2003 to 2004, and 2011 to 2012) were pooled and analyzed. The average age of study participants ( n = 9,445) was 48.4 y. Disutility scores were derived from self-rated health and the numbers of physically unhealthy days, mentally unhealthy days, and days with activity limitation, employing a previously published algorithm. The associations between the disutility scores and the numbers of decayed teeth, missing teeth, and periodontitis were examined by multiple linear regression stratified by age groups (20–39, 40–59, and ≥60 y), adjusted for other covariates (age, sex, wave fixed effect, educational attainment, smoking, and diabetes). The QALE loss due to dental conditions at the age of 20 was estimated using life tables. Decayed and missing teeth, but not periodontitis, were associated with a larger disutility score. The coefficient for decayed teeth was larger among the older population, whereas that of missing teeth was smaller among them. The estimated QALE loss was 0.43 y (95% confidence interval [CI], 0.28–0.59), which reached 5.3% of QALE loss (8.15 y; 95% CI, 8.03–8.27) due to overall morbidity. There were clear social gradients in QALE loss by dental conditions across the life course, and people with high school or less education had 0.32 y larger QALE loss in total compared with people with college or more education. This study suggests that improvements in people’s dental health may yield substantial gains in population health and well-being. The necessity of more comprehensive public health strategies is highlighted.

Income Trajectories and Oral Health of Young People in a Life Course Study

OBJECTIVE

To investigate the impact of the family's socioeconomic trajectory on the oral health status of young people in the city of Sobral, Ceará, Brazil, and test the hypotheses of the life course theory.

METHODS

This is a cohort study conducted in 2000, 2006, and 2012. In the third wave, 482 individuals between 17 and 21 years of age were examined and interviewed. The outcomes analyzed were the trajectory of tooth decay (decayed teeth in 2012 and cavity reoccurrence) and the trajectory of dental assistance (immediate dental assistance and untreated caries). The socioeconomic trajectory was measured by the mobility of the family's income between childhood and youth and the number of episodes of poverty throughout life.

RESULTS

The risk of developing decayed teeth in 2012 was greater for those who had always remained poor. Young people who were never poor had fewer decayed teeth in 2012, but more cavity reoccurrence. Downward mobility resulted in less access to immediate dental assistance. More experience of poverty throughout life implied more decayed teeth in 2012 and less immediate dental assistance.

CONCLUSION

The life course hypotheses regarding an influence of socioeconomic mobility and cumulative risk on oral health outcomes in youth were confirmed.

Life course approach in the assessment of association between dental caries and health capital with family-related characteristics among 12-year-old school children

Aim:

To assess the association of dental caries with health capital among 12-year old in Private and Government school children with differing family-related characteristics.

Objectives:

To know the influence of height, weight, and family-related characteristics on dental caries.

Materials and Methods:

A cross-sectional study was done on a sample of 800 students. Stratified systematic random sampling technique was used. Data were collected on health variables that include their height and weight; family characteristics include type of family and time spent with their mothers in a school day and number of children in their family. Clinical examination was done using dentition status and treatment needs.

Results:

The prevalence of dental caries in government school was 64% and in private school was 59.2%. Logistic regression analysis identified that dental caries was significantly associated with type of school, height, and socioeconomic status and the factors which are not significantly associated are weight, time spent with their mothers, number of siblings, dental visits, and type of family.

Conclusion:

This study reported dental caries prevalence to be 61.6% with a mean DMFT (Decayed Missing Filled Teeth) of 1.26 ± 1.32 in 12-year old children. The cooperation of dentists and pediatricians is necessary in assessment of general and dental health in a holistic context throughout the life course to enhance the well-being of adolescents.

Periodontal Diseases and Traumatic Dental Injuries in the Pediatric Population

This article provides an overview of periodontal diseases and traumatic dental injuries (TDIs) in children and adolescents, which are serious public health problems worldwide. Periodontal diseases, including gingivitis and periodontitis, commonly affect the oral soft tissues and teeth and often co-occur with other chronic diseases. TDIs are prevalent from an early age and carry high treatment costs. Behavioral and environmental factors contribute to both TDIs and periodontal diseases, but their etiology varies according to population characteristics and case definition. Both conditions may lead to pain, function impairment, esthetic problems, and psychosocial effects, with major consequences on quality of life.

Socioeconomic Inequalities in Oral Health Among Unmarried and Married Women: Evidence From a Population-Based Study in Japan

Background

Socioeconomic inequalities in oral health have been reported in developed countries, but the influence of marital status has rarely been considered. Our aim was to examine marital status differentials in the association between socioeconomic status (SES) and oral health among community-dwelling Japanese women.

Methods

From 2010 to 2011, a questionnaire survey was conducted among residents aged 25–50 years in Japanese metropolitan areas. Valid responses were received from 626 unmarried women and 1,620 married women. Women’s own and husbands’ educational attainment and equivalent income were used to assess SES. Self-rated “fair” or “poor” oral health was defined as poor oral health. Multiple logistic regression analysis was conducted to examine which SES indicators were associated with oral health.

Results

The prevalence of poor oral health was 21.1% among unmarried women and 23.8% among married women. Among unmarried women, equivalent income was not associated with oral health, but women’s own education was significantly associated with oral health; the multivariate-adjusted odds ratio of poor oral health among those with high school education or lower compared to those with university education or higher was 2.14 (95% confidence interval, 1.19–3.87). Among married women, neither women’s own nor husbands’ education was associated with oral health, but equivalent income was significantly associated with oral health, particularly among housewives; the multivariate-adjusted odds ratio of poor oral health among those in the lowest compared with highest income quartile was 1.57 (95% confidence interval, 1.08–2.27).

Conclusions

These findings indicate that marital status should be considered when examining associations between SES and oral health among Japanese women.

Using focus groups to design systems science models that promote oral health equity

BACKGROUND

While the US population overall has experienced improvements in oral health over the past 60 years, oral diseases remain among the most common chronic conditions across the life course. Further, lack of access to oral health care contributes to profound and enduring oral health inequities worldwide. Vulnerable and underserved populations who commonly lack access to oral health care include racial/ethnic minority older adults living in urban environments. The aim of this study was to use a systematic approach to explicate cause and effect relationships in creating a causal map, a type of concept map in which the links between nodes represent causality or influence.

METHODS

To improve our mental models of the real world and devise strategies to promote oral health equity, methods including system dynamics, agent-based modeling, geographic information science, and social network simulation have been leveraged by the research team. The practice of systems science modeling is situated amidst an ongoing modeling process of observing the real world, formulating mental models of how it works, setting decision rules to guide behavior, and from these heuristics, making decisions that in turn affect the state of the real world. Qualitative data were obtained from focus groups conducted with community-dwelling older adults who self-identify as African American, Dominican, or Puerto Rican to elicit their lived experiences in accessing oral health care in their northern Manhattan neighborhoods.

RESULTS

The findings of this study support the multi-dimensional and multi-level perspective of access to oral health care and affirm a theorized discrepancy in fit between available dental providers and patients. The lack of information about oral health at the community level may be compromising the use and quality of oral health care among racial/ethnic minority older adults.

CONCLUSIONS

Well-informed community members may fill critical roles in oral health promotion, as they are viewed as highly credible sources of information and recommendations for dental providers. The next phase of this research will involve incorporating the knowledge gained from this study into simulation models that will be used to explore alternative paths toward improving oral health and health care for racial/ethnic minority older adults.

Assessment of oral health and cost of care for a group of refugees in Germany: a cross-sectional study

Background

There is a research gap concerning the evaluation of the oral healthcare of refugees. Therefore, the aim of this study was to evaluate the oral health of refugees and to estimate the costs of oral care.

Methods

The study was conceptualized as a pilot study. The study participants were refugees who lived either in collective living quarters or at a reception center in a region of the federal state of Schleswig-Holstein, Germany. The cross-sectional design was complemented by dental screening. Data were collected from August 2016 until July 2017. The basic condition of the teeth was evaluated using a convenience sample by a single dentist. The assessment of caries was carried out visually in accordance with the International Caries Detection and Assessment System from code 3 and higher. The DMF-T (decayed, (D), missing, (M), filled (F), teeth (T)) index was calculated. The costs of oral care were analyzed for conservative treatment (filling or extraction) and for prosthetic treatment (missing teeth) in the form of a bridge or crown.

Results

The dental screening was attended by 102 refugees, with a mean age of 28 years. A total of 49% of the study sample suffered from toothache, and the DMF-T index had a mean of 6.89. For 92% of the study sample, treatment was indicated, and a cost estimate of the treatment could be calculated. The average cost of conservative treatment was estimated to be 205.86 EUR, and the average cost of prosthetic treatment was estimated to be 588.0 EUR. The oral healthcare costs of the different treatment procedures were higher for refugees that presented with toothache than for those without toothache, with the exception of prosthetic treatment procedures.

Conclusions

There is a lack of population-based data that survey the oral health status of refugees. Therefore, the current study presents an initial overview regarding the oral health status and the potential costs of oral healthcare of refugees.

Electronic supplementary material

The online version of this article (10.1186/s12903-018-0535-1) contains supplementary material, which is available to authorized users.

Socioeconomic Inequalities in Oral Health among Middle-Aged and Elderly Japanese: NIPPON DATA2010

BACKGROUND

Most studies on socioeconomic inequalities in oral health have not considered the effects of behavioral and biological factors and age differences. Furthermore, the nationwide status of inequalities remains unclear in Japan.

METHODS

We analyzed data from 2,089 residents aged ≥40 years throughout Japan. The lowest quartile of the number of remaining teeth for each 10-year age category was defined as poor oral health. Behavioral and biological factors included smoking status, obesity, diabetes mellitus, high-sensitivity C-reactive protein, and the use of dental devices. Multiple logistic regression analyses were conducted to examine the associations of educational attainment and equivalent household expenditure (EHE) with oral health, and stratified analyses by age category were also conducted (40-64 years and ≥65 years).

RESULTS

Lower education and lower EHE were significantly associated with an increased risk of poor oral health after adjusting for age, sex, employment status, marital and living statuses, and EHE/education; the odds ratio for junior high school education compared with ≥college education was 1.84 (95% confidence interval [CI], 1.36-2.49), and the odds ratio of the lowest compared with the highest EHE quartile was 1.91 (95% CI, 1.43-2.56). Further adjustments for behavioral and biological factors attenuated but did not eliminate these associations. EHE was significantly associated with oral health among elderly adults only, with a significant interaction by age category.

CONCLUSIONS

Those with a lower education and those with lower EHE had a significantly higher risk of poor oral health, even after adjustments for behavioral and biological factors.

[Inequalities in dental care during the life course of young people: a cohort study]

The scope of this study was to investigate dental care from the life course perspective and its determinant factors among young people in the city of Sobral, State of Ceará, Brazil. A cohort study was conducted with waves in 2000, 2006 and 2012 with 482 young people aged between 17 and 21 years. Two outcomes were investigated: immediate dental care and the lack of dental care, based on the dental trajectory in relation to restorative treatment. Socioeconomic conditions and recourse to oral health services and actions in the three waves investigated were used as independent variables. It was found that low socioeconomic status throughout life presented itself as a risk factor for lack of dental care and the inverse effect was observed with immediate dental care. Participation in groups of teenagers was also related to dental care, as well as receiving information on oral health. This study revealed the presence of inequalities in dental care throughout the life course of the population assessed.

Early socioeconomic conditions and severe tooth loss in middle-aged Costa Ricans

OBJECTIVE

A wide literature shows a strong social gradient in tooth loss according to income, education and occupation, in both developed and developing countries. It has been shown associations between tooth loss and parental education and occupation, independently of adult conditions. To explore the role of early socioeconomic circumstances on tooth loss, we used a lifecourse model. We analysed the direct and indirect links between early socioeconomic conditions and severe adult tooth loss.

METHODS

We used the Costa Rican Longevity and Healthy Aging Study 1945-1955 Retirement Cohort, a nationally representative longitudinal survey of Costa Rican residents born between 1945 and 1955. We used imputed data on 2796 individuals. Principal component analyses were run to integrate measures approaching the material circumstances during childhood and adulthood. We additionally examined the role of adult health behaviours and education level as potential mediators in the multivariable regression.

RESULTS

Early socioeconomic conditions were found strongly associated with severe tooth loss; 72.4% of the people who experienced the most deprived socioeconomic conditions during childhood (quartile 1) had severe tooth loss at the time of the interview; vs 43.3% in quartile 4 (most advantaged). This link diminished after adjustment for adult mediators. However, it remained a significant determinant of severe tooth loss in the final model.

CONCLUSION

The lifecourse model allowed to highlight that early socioeconomic conditions could have long-term consequences on severe tooth loss in middle ages via both direct and indirect mechanisms.

Dental visiting behaviours among primary schoolchildren: Application of the health belief model

OBJECTIVES

This study aimed to develop and validate a new instrument based on the health belief model and to use the instrument to investigate the determinants of regular dental attendance among primary schoolchildren.

METHODS

A cross-sectional study was conducted using a newly developed measurement scale based on the HBM, 4 health-promoting schools participated in the study and 958 students studying in grades 4-6 completed the questionnaire. The psychometric properties of the instrument were analysed, and a path analysis model was used to identify the determinants of regular dental attendance.

RESULTS

The instrument had good internal consistency (Cronbach's α = 0.826-0.925) and a factor structure identical to HBM. Overall, the schoolchildren's health beliefs on caries treatment were positive. The determinants of regular dental visit were school location (β = -0.13), mother's education level (β = 0.15), susceptibility (β = -0.18) and barriers (β = -0.11).

CONCLUSION

This study provided evidence that HBM is applicable to children's dental visiting behaviour and their health beliefs towards adherence to caries treatment. Although children had a positive attitude towards dental visits, environmental obstacles would interfere with dental visits. The newly developed instrument could be used to identify high-risk children and help design oral health interventions for these children. Moreover, policy makers should increase the accessibility of dental resources to enhance the utilization of dental care among schoolchildren.

Psychosocial factors and traumatic dental injuries among adolescents

OBJECTIVES

To examine the association of traumatic dental injuries (TDI) and psychosocial factors in adolescents and to identify psychological profiles associated with TDI.

METHODS

A cross-sectional study was conducted involving 531 students aged 13-16 years. Data were collected through oral examination and a structured interview with the adolescents, in conjunction with a questionnaire answered by their mothers. Associations between TDI and independent variables were analysed using a model-based approach, while an exploratory data analysis was applied to identify homogenous clusters of adolescents in relation to their sense of coherence (SoC), perception of parental support and their mothers' SoC. These clusters were examined further for associations with TDI and psychosocial variables.

RESULTS

The prevalence of TDI was 15.8%. Adolescents with high TDI prevalence were males, nonfirstborns, or those frequently engaging in physical activity. In addition, both their own SoC and that of their mother were low and they reported low parental support. They were also prone to complaining about the behaviour of their peer group. The hierarchical cluster analysis (HCA) demonstrated three homogenous clusters. The cluster with the highest scores for all psychological variables included adolescents with low TDI prevalence, low paternal punishment, spacious home environment, high Family Affluence Scale (FAS) score, good school grades, few complaints about schoolmates and higher maternal education.

CONCLUSIONS

Psychosocial factors appear to influence an adolescent's risk of TDI. High parental support, high own and maternal SoC and a higher socioeconomic status (SES) are typical of adolescents with low TDI experience.

Tooth Loss and Risk of Dementia in the Community: the Hisayama Study

OBJECTIVES

To clarify the effect of tooth loss on development of all-cause dementia and its subtypes in an elderly Japanese population.

DESIGN

Prospective cohort study.

SETTING

The Hisayama Study, Japan.

PARTICIPANTS

Community-dwelling Japanese adults without dementia aged 60 and older (N = 1,566) were followed for 5 years (2007-2012).

MEASUREMENTS

Participants were classified into four categories according to baseline number of remaining teeth (≥20, 10-19, 1-9, 0). The risk estimates of the effect of tooth loss on the development of all-cause dementia, Alzheimer's disease (AD), and vascular dementia (VaD) were computed using a Cox proportional hazards model.

RESULTS

During follow-up, 180 (11.5%) subjects developed all-cause dementia; 127 (8.1%) had AD, and 42 (2.7%) had VaD. After adjusting for potential confounders, there was a tendency for the multivariable-adjusted hazard ratio of all-cause dementia to increase with decrease in number of remaining teeth (P for trend = .04). The risk of all-cause dementia was 1.62 times as great in subjects with 10 to 19 teeth, 1.81 times as great in those with one to nine teeth, and 1.63 times as great in those with no teeth as in those with 20 teeth or more. An inverse association was observed between number of remaining teeth and risk of AD (P for trend = .08), but no such association was observed with risk of VaD (P for trend = .20).

CONCLUSION

Tooth loss is associated with an increased risk of all-cause dementia and AD in the Japanese population.

Factors related to the dental caries incidence in youth: a cohort study in Brazilian Northeastern

Abstract The conceptual model of the life course considers that health-disease is a dynamic process that is also affected by previous and current lifelong experiences. The aim of the study was to investigate the incidence of caries and its determinants in young people in Sobral-Ceará, Brazil. This was a cohort study of oral health started in 2000, with waves in 2006 and 2012. 482 young people aged 17-21 years were examined and interviewed. The incidence of caries between 2006 and 2012 was the outcome analyzed and the independent variables were socioeconomic conditions and use of oral health actions and services. The average incidence of caries was 2.95 teeth from the adolescence to the youth. It was found that social deprivation throughout life and deny access to the dentist during infancy implies a greater incidence of caries in youth, therefore, the use of services and oral health actions during the adolescence and youth have not been sufficient to reduce inequities in oral health.

Oral-systemic health during pregnancy: exploring prenatal and oral health providers' information, motivation and behavioral skills

Pregnancy is identified as a sensitive period of increased risk for poor oral health among mothers and offspring. Subsequently, both medical and dental associations have re-endorsed consolidated, inter-professional guidelines promoting oral health during pregnancy. The objective was to explore prenatal and oral health providers' information, motivation and practice behaviors related to oral health during pregnancy. Twenty-two in-depth interviews were conducted with prenatal and oral health providers based on the Information-Motivation-Behavioral Skills Model. Data were analyzed using the constant comparative method in NVivo 10. Providers held variable knowledge with regards to identified oral-systemic connections and implications. Most providers were unaware of the guidelines; however, some oral health providers reported avoiding specific treatment behaviors during this period. Motivation to address oral-systemic health during pregnancy included: prevention; healthy pregnancy/birth outcomes; patient's complaint/question as cue to action; comprehensive, patient-centered, and family-centered care; ethical duty; and professional governing body. Oral health providers reported assessing, educating, and communicating with patients about oral health issues; whereas prenatal providers rarely addressed oral health but reported signing approval forms to receive such care. A few oral health providers highlighted lifecourse implications and the need for family-centered care when addressing poor oral health among pregnant patients. Findings suggest gaps in oral health prevention information and behaviors among prenatal and oral health providers. Future efforts should examine effective dissemination and implementation strategies that translate evidence-based guidelines into clinical practice, with the ultimate goal of improve oral-systemic health among women and their offspring across the lifecourse.

Stressful Life Events and Risk of Depression 25 Years Later: Race and Gender Differences

BACKGROUND

Although stressful life events (SLEs) predict subsequent risk of developing a major depressive episode (MDE), limited information exists on whether or not race and gender alters the predictive role of SLE on risk of MDE over a long-term period. The current study explored race and gender differences in the long-term predictive role of SLE at baseline (1986) on subsequent risk of MDE 25 years later (2011) in a nationally representative cohort in the United States.

METHODS

Using a life course epidemiological approach, this longitudinal study borrowed data from the Americans' Changing Lives (ACL) Study 1986-2011. Main predictor of interest was baseline SLE over the last 3 years measured at 1986. Main outcome was risk of MDE [Composite International Diagnostic Interview (CIDI)] 25 years later (2011). Covariates included demographics, socioeconomics, depressive symptoms [Center for Epidemiological Studies-Depression Scale (CES-D)], chronic medical conditions, and health behaviors measured at baseline (1986). Gender and race were the focal moderators. We employed logistic regressions in the pooled sample, and specific to race and gender, to test whether or not SLE × race and SLE × gender interactions are significant.

RESULTS

In the pooled sample, baseline SLE (1986) predicted risk of MDE 25 years later (2011). We also found a gender by SLE interaction, suggesting a stronger predictive role of SLE for subsequent clinical depression for men compared to women. Race did not modify the predictive role of SLE on subsequent risk of MDE 25 years later.

CONCLUSION

How SLE predicts MDE 25 years later differs for men and women, with a stronger predictive role for men compared to women. More research is needed to better understand the complex links between gender, sex, stress, and depression.