The research agenda on oral health inequalities: the IADR-GOHIRA initiative

An overview of the burden of oral cancer in Sri Lanka and its inequalities in the face of contemporary economic and social malaise

OBJECTIVES

Over the past several decades, oral cancer has been the most common malignancy among Sri Lankan males and the top 10 cancer among females, disproportionately affecting low socio-economic groups. Sri Lanka is a lower-middle-income developing country (LMIC), currently striking through an economic crisis, and social and political unrest. Occurring at an accessible body site and predominantly attributed to potentially modifiable health-related behaviours, oral cancer should be preventable and controllable. Unfortunately, broader contextual factors that are socio-cultural, environmental, economic, and political and mediated through social determinants of people's lives consistently hinder progress. Many LMICs with a high burden of oral cancer are now gripped by economic crises, consequent social and political unrest, all compounded by reduced public health investments. The aim of this review is to provide a critical commentary on key aspects of oral cancer epidemiology including inequalities, using Sri Lanka as a case study.

METHODS

The review synthesizes evidence from multiple data sources, such as published studies, web-based national cancer incidence data, national surveys on smokeless tobacco (ST) and areca nut use, smoking and alcohol consumption, poverty headcount ratios, economic growth, and Gross Domestic Product (GDP) health expenditure. National trends in the oral cancer, ST use, smoking and alcohol consumption in Sri Lanka are identified alongside inequalities.

RESULTS

Using these evidence sources, we discuss 'where are we now?', together with the availability, accessibility and affordability of oral cancer treatment services, oral cancer prevention and control programmes, tobacco and alcohol control policies, and finally, outline macroeconomic perspectives of Sri Lanka.

CONCLUSIONS

Finally, we speculate, 'where to next?' Our overarching goal of this review is to initiate a critical discourse on bridging the gaps and crossing the divides to tackle oral cancer inequalities in LMIC such as Sri Lanka.

The Effect of a Personalized Oral Health Education Program on Periodontal Health in an At-Risk Population: A Randomized Controlled Trial

While periodontal disease is associated with many risk factors, socioeconomically disadvantaged communities experience the highest disease burden. The aim of this study was to evaluate the effectiveness of a personalized oral health education program, in combination with routine dental treatment, in participants from a low socioeconomic community. We used a randomized, controlled, examiner-blinded clinical trial. A total of 579 participants (aged 18–60 years) were randomly grouped: the intervention group (n = 292) received a personalized oral health education program in combination with routine dental care and the control group (n = 287) received routine dental care. All participants were assessed for improvement in oral health care behaviors, dental plaque, and periodontal status at baseline, 12 months, and 24 months. We found a significant drop (p < 0.001) in the plaque indices, Periodontal Probing Depths (PPD) and Bleeding on Probing (BOP) between baseline and the 12-month follow-up for both groups. For BOP, the number of sites positive was significantly different between baseline and the 24-month follow-up (p = 0.037). No differences were found between the two groups for any evaluated clinical outcome. The personalized oral health education program used in the current study did not appear to add significant improvement to clinical outcomes of periodontal health compared with routine restorative dental care per se.

Assessing oral health of crack users in Brazil: Perceptions and associated factors, findings from a mixed methods study

This study explores associated factors and perceptions of oral health among crack users recruited in open drug scenes in Brazil. A mixed methods approach was used. The quantitative component analysed findings from a large (N = 7381), population-based survey. The outcomes under analysis were 'self-perception of oral health' and 'self-reporting of problems affecting the mouth, teeth and gingiva (gums)'. The qualitative component comprised a focus group, with 12 individuals recruited from a drug treatment clinic. Lower self-perception of oral health problems vis-à-vis a higher prevalence of problems affecting the mouth, teeth, and gingiva were found in users who had a lower level of education, used substances daily, had worse self-perception of physical health, did not receive health care and regularly used alcohol and/or tobacco. The results show an association between substance use and decline in oral health, as well as the lack of health services focusing on such issues. Oral health services should be emphasised as a gateway to the health system. So far, the putative cross-referral between services and professionals working in oral health and other health professionals working in the field of drug dependence has not been observed.

Geospatial analysis of the urban and rural/remote distribution of dental services in Scotland, Wales and Northern Ireland

AIM

To address deficits in human resources for oral health data (HROH) in rural and remote areas in Wales, Scotland and Northern Ireland by spatially profiling and modelling the distribution pattern of dental practices according to Health Boards.

METHODS

National Health Service (NHS) dental practices were located and mapped against population and rural-urban classifications of Scotland, Wales and Northern Ireland, using Geographic Information System (GIS) tools. All data collected were at the smallest geographical statistical hierarchy level in each country, and population data were retrieved from the 2011 census.

RESULTS

A total of 1,695 NHS dental practices were mapped against 27 Health Board regions. In Scotland, Northern Ireland and Wales, 18.3%, 18.7% and 7.7%, respectively, of the population living in the most remote areas resided within 2.5 km of a dental practice. In each country, the Health Boards with the largest proportion of the population living more than 10 km from a dental practice were the Western Isles (Scotland), Western Health and Social Care Trust (HSCT) (Northern Ireland) and Hywel Dda University Health Board (UHB) (Wales). In each country, the highest practice-to-population (PtP) ratios were found in Forth Valley (1:7,194) (Scotland), Southern HSCT (1:5,115) (Northern Ireland) and Hywel Dda UHB (Wales) (1:7,907).

CONCLUSION

Dental services are distributed unequally between urban and rural areas. PtP ratios coupled with GIS analysis are important tools to improve HROH distribution.

A narrative review of the effects of sugar-sweetened beverages on human health: A key global health issue

The provision of healthy and safe food is vital for human health, and the addition of unnecessary sugars in foodstuffs is an important global issue, leading to multiple long- and short-term health issues and spiraling costs for individuals and governments alike. The negative effect of excess sugar consumption contributes to adverse health conditions, including obesity, type 2 diabetes, and poor oral health in both high and low resource settings. A key plank of governmental and health promotion bodies' nutritional guidance is to raise public awareness of "hidden" sugars, salt, and fats, such as found in processed foods and sugar-sweetened beverages (SSBs), and guide individuals to reduce their consumption. This rapid narrative review brings together some of the key issues identified in the literature around the consumption of SSBs, including patterns of consumption, the general impact on human health and nutrition, specific effects on oral health and the oral microbiome, and strategies to address over-consumption. The range of long-term adverse effects on health is often misunderstood or unknown by the public. However, some strategies have succeeded in reducing the consumption of SSBs, including public health strategies and interventions and the imposition of taxes or levies, and this article makes recommendations for action.

Characterization of progenitor/stem cell population from human dental socket and their multidifferentiation potential

Dental stem cells have many applications in medicine, dentistry and stem cell biology in general due to their easy accessibility and low morbidity. A common surgical manoeuvre after a tooth extraction is the dental socket curettage which is necessary to clean the alveolus and favour alveolar bone healing. This procedure can cause very low morbidity compared to bone marrow collection procedures and the collected material is normally discarded. In order to investigate if the tissue obtained by dental socket curettage after a tooth extraction was a feasible alternative source to isolate human stem cells, we isolated and characterized two different stem cell populations based on STRO-1 and CD146 expression. We were able to collect and grow cells from dental socket of vital and non-vital teeth. Both populations were proliferative, clonogenic and expressed STRO-1, CD146, CD90, NG2, PDGFR-β, which are markers found in stem cells, presented in vitro multiline-differentiation into osteogenic, chondrogenic, and adipogenic tissue, and in vivo transplanted cells formed mineralized tissue. Interestingly, STRO-1⁺ clonogenic cells presented better multidifferentiation than CD146⁺ cells. Our results showed that mesenchymal stem cells can be isolated from the tiny tissue collected by dental socket curettage after vital and non-vital tooth extraction and suggest that STRO-1 is an important marker to be used to sort cells with multidifferentiation capacity.

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.

Inequality in unmet dental care needs among South Korean adults

Background

The current public health research agenda was to identify the means to reduce oral health inequalities internationally. The objectives of this study were to provide evidence of inequality in unmet dental needs and to find influencing factors attributable to those among South Korean adults.

Methods

Pooled cross-sectional data from the fourth Korean National Health and Nutrition Examination Survey (2007–2009) on 17,141 Korean adults were used. Demographic factors (sex, age, and marital status), socioeconomic factors (education level, employment status, and income level), need factors (normative dental needs and self-perceived oral health status), and oral health-related factors (the number of decayed teeth, the presence of periodontitis, and the number of missing teeth) were included. Multiple logistic regression analysis was performed.

Results

Of South Korean adults, 43.9% had perceived unmet dental needs, with the most common reason being financial difficulties. The disparities in unmet dental care needs were strongly associated with income level, normative treatment needs, and self-perceived oral health status. The low-income group, people with normative dental treatment needs, and those with perceived poor oral health status were more likely to have unmet dental needs. There was considerable inequality in unmet dental care needs due to economic reasons according to such socioeconomic factors as income and education level.

Conclusions

Public health policies with the expansion of dental insurance coverage are needed to reduce inequalities in unmet dental care needs and improve the accessibility of dental care services to vulnerable groups who are experiencing unmet dental care needs due to socioeconomic factors despite having normative and self-perceived needs for dental treatment.

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.

Interprofessional Collaborative Practice Models in Chronic Disease Management

Interprofessional collaboration in health has become essential to providing high-quality care, decreased costs, and improved outcomes. Patient-centered care requires synthesis of all the components of primary and specialty medicine to address patient needs. For individuals living with chronic diseases, this model is even more critical to obtain better health outcomes. Studies have shown shown that oral health and systemic disease are correlated as it relates to disease development and progression. Thus, inclusion of oral health in many of the existing and new collaborative models could result in better management of chronic illnesses and improve overall health outcomes.

Potential of an amelogenin based peptide in promoting reminerlization of initial enamel caries

OBJECTIVE

In this study we give a preliminary study of a rationally designed small peptide, which is based on the enamel matrix protein amelogenin, to investigate its effect on remineralization of initial enamel caries lesions.

DESIGN

A novel peptide was designed and synthesized to investigate its effects on the remineralization of initial enamel carious lesions during pH cycling that simulates intra-oral conditions. Initial lesions were created in bovine enamel blocks, which were then pH-cycled for 12 days in the presence of 25μM peptide, 1g/L NaF (positive control), 50mM HEPES buffer(negative control). Before and after pH cycling, enamel blocks were analyzed by surface microhardness testing, polarized light microscopy and transverse microradiography.

RESULTS

Percentage of surface microhardness recovery (SMHR%) after pH cycling was significantly higher in peptide group than HEPES group. Lower lesion depth and less mineral mineral loss were found in peptide or NaF treatment groups after the cycling, and were significantly different to HEPES group. No significant differences were observed between the blocks treated with peptide and those treated with NaF.

CONCLUSSION

This study provides in vitro evidence that this amelogenin based peptide promotes enamel caries remineralization, offering a promising remineralizing biomaterial in initial enamel carious treatment.

Long-Term Effects of School-Based Oral Health Program on Oral Health Knowledge and Practices and Oral Health-Related Quality of Life

OBJECTIVE

To evaluate the effects of exposure to the School Oral Health Program (SOHP) during primary school years on the current oral health (OH) knowledge and practices and OH-related quality of life (OHRQoL) of Kuwait University students.

SUBJECTS AND METHODS

300 university students, aged 17.6-24.3 years, completed a validated questionnaire that consisted of 5 sections about demographics, health self-evaluation, OH knowledge and practices and OHRQoL. Of these students, 260 were female, 40 male, 262 single and 38 married. 189 participants had attended the SOHP, while 111 had not. Frequencies and means were used for data description. The Student t test was used to compare the means, while χ(2) analysis was used for the associations between SOHP and non-SOHP attendance. The odds ratios (ORs) were calculated for significant factors.

RESULTS

The SOHP attendees were twice as aware of the relationship between gum problems and heart diseases than the non-SOHP (OR = 2, 95% CI = 1.15-3.48, p = 0.013). The daily activities of the non-SOHP attendees were twice as likely to be affected by dental health issues compared to those of the SOHP attendees (OR = 2.28, 95% CI = 1.41-3.68, p < 0.001). In addition, the SOHP attendees were 3 times as likely to describe their OH status as good/very good/excellent than the non-SOHP attendees (OR = 2.85, 95% CI = 1.31-6.18, p = 0.008).

CONCLUSIONS

The SOHP attendees had a better OHRQoL and overall self-satisfaction with their OH than the non-SOHP attendees with insignificant differences between the 2 groups in OH knowledge and practices.

Efficacy of fluoride varnish and casein phosphopeptide-amorphous calcium phosphate for remineralization of primary teeth: a randomized clinical trial

OBJECTIVE

We aimed to evaluate the efficacy of oral hygiene instruction, fluoride varnish and casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) for remineralizing white spot lesions (WSL), and the effect of these on the dmft index in primary teeth.

SUBJECTS AND METHODS

In this 1-year, randomized clinical trial, 140 children aged 12-36 months with WSL in the anterior maxillary teeth were selected and randomly divided into 4 groups of 35 children each. Group 1 (control) received no preventive intervention. In group 2, there was oral hygiene and dietary counseling. In group 3, there was oral hygiene and the application of fluoride varnish at 4, 8 and 12 months after baseline. In group 4, there was oral hygiene and tooth mousse was applied by the parents twice a day over a 12-month period. At baseline and 4, 8 and 12 months after the intervention, the size of WSL in millimeters and the dmft index were recorded. One hundred and twenty-two children completed the study. Data were analyzed using the repeated-measures ANOVA test.

RESULTS

In group 1, the mean percent WSL area and dmft index values had increased significantly at 12 months after baseline (p < 0.001). The interventions led to significant decreases in the size of the WSL; the greatest reduction was in group 4 (63%) followed by group 3 (51%) and group 2 (10%) after 12 months. The smallest increase in the dmft index was in group 4 (0.17), followed by groups 3 (0.3) and 2 (0.42). However, there were no significant differences between the groups (p < 0.001).

CONCLUSIONS

Oral hygiene along with four fluoride varnish applications or constant CPP-ACP during the 12- month period reduced the size of WSL in the anterior primary teeth and caused a small increase in dmft index values.