Efficacy evaluation of an anti-caries varnish: protocol for a phase II randomised controlled trial

Understanding the Predictive Potential of the Oral Microbiome in the Development and Progression of Early Childhood Caries

BACKGROUND

Early childhood caries (ECC) is the most common chronic disease in young children and a public health problem worldwide. It is characterized by the presence of atypical and fast progressive caries lesions. The aggressive form of ECC, severe early childhood caries (S-ECC), can lead to the destruction of the whole crown of most of the deciduous teeth and cause pain and sepsis, affecting the child's quality of life. Although the multifactorial etiology of ECC is known, including social, environmental, behavioral, and genetic determinants, there is a consensus that this disease is driven by an imbalance between the oral microbiome and host, or dysbiosis, mediated by high sugar consumption and poor oral hygiene. Knowledge of the microbiome in healthy and caries status is crucial for risk monitoring, prevention, and development of therapies to revert dysbiosis and restore oral health. Molecular biology tools, including next-generation sequencing methods and proteomic approaches, have led to the discovery of new species and microbial biomarkers that could reveal potential risk profiles for the development of ECC and new targets for anti-caries therapies. This narrative review summarized some general aspects of ECC, such as definition, epidemiology, and etiology, the influence of oral microbiota in the development and progression of ECC based on the current evidence from genomics, transcriptomic, proteomic, and metabolomic studies and the effect of antimicrobial intervention on oral microbiota associated with ECC.

CONCLUSION

The evaluation of genetic and proteomic markers represents a promising approach to predict the risk of ECC before its clinical manifestation and plan efficient therapeutic interventions for ECC in its initial stages, avoiding irreversible dental cavitation.

Anti-racist approaches to increase access to general and oral health care during a pandemic in the Pacific Islander community

Limited data exists on Pacific Islander (PI) health, but a growing body of literature reports the existence of racial discrimination and inequities and mistrust of the healthcare system, leading to poor health outcomes. When COVID‐19 restricted health services, such inequities and mistrust due to historical trauma were magnified. This report describes one federally qualified health center's dental department's response utilizing culture‐based approaches, community relationships, and the social determinants of health (SDOH) to dispel the stigma of COVID and restrictions on in‐person care in order to lower barriers to accessing care. When the dental department transitioned to emergency‐only care, staff were redeployed to address significant inequities facing the PI community. Redeployment activities included building relationships with the most vulnerable patients, delivering healthy foods, supplies, oral hygiene kits to households, and canvasing neighborhood businesses with public health education. The mobile dental clinic, a trusted symbol in the community, also brought public health education to community testing events and food distributions. From March 2020 to July 2020, staff conducted over 800 outreach calls for health and food security, delivered over 2000 care packages and oral hygiene kits. Also, frequent community outreach by the mobile dental clinic led to a 10‐fold increase in COVID testing. Investing in relationship building can maintain access to health care and build trust in the health care system for PI communities. This approach may be relevant to others serving other communities experiencing racism.

Comparing the Effectiveness of Topical Fluoride and Povidone Iodine with Topical Fluoride Alone for the Prevention of Dental Caries among Children: A Systematic Review and Meta-analysis

Background

Combined use of povidone iodine (PI) along with topical fluorides (TF) has been suggested as a promising strategy to reduce dental caries incidence and cariogenic bacterial load. However, the available literature presents mixed evidence regarding its effectiveness as compared to TF application alone.

Aim and objective

'TF + PI' vs TF alone in the prevention of dental caries among 1-12-year-old children assessed through caries increment and mean S. mutans and Lactobacillus counts.

Materials and methods

Five databases (Cochrane Central Register of Controlled Trials, EBSCOhost, PubMed/Medline, Scopus, and Web of Science) were searched for relevant literature. Out of 72 studies that were screened, 7 eligible studies were included out of which 4 studies were subjected to meta-analysis. The generic inverse variance test was used to assess the primary outcome reported as mean ± SD/events occurred (caries incidence), whereas for mean post-intervention S. mutans colony count, inverse variance function was used. The Cochrane's Collaboration tool and Modified Downs and Black scoring criteria were used to evaluate the quality of the included articles. Heterogeneity across the studies was assessed using the I ² statistic. Statistical significance was set at p < 0.05.

Results

Overall, for primary and permanent dentition combined, the dental caries incidence was found to be significantly lower in the 'TF + PI' combined therapy group as compared to TF alone [SMD -0.4 (-0.78 to -0.03), p = 0.04]. The two groups showed no significant difference with respect to post-intervention S. mutans count [SMD -0.1 (-0.57 to +0.37), p = 0.69]. No study was found that compared post-intervention Lactobacillus count between the two groups.

Conclusion

Based on the pooled analysis from the limited literature available, there is a very low quality of evidence that 'TF + PI' combined therapy is more effective in the prevention of new caries lesions among 1-12-year-old children as compared to TF use alone. Future clinical trials with robust methodologies are recommended to generate conclusive evidence.

Clinical significance

PI application might exert an added benefit with TF in preventing the occurrence of new carious lesions among 1-12-year-old children.

How to cite this article

Gupta A, Nishant, Sharda S, et al. Comparing the Effectiveness of Topical Fluoride and Povidone Iodine with Topical Fluoride Alone for the Prevention of Dental Caries among Children: A Systematic Review and Meta-analysis. Int J Clin Pediatr Dent 2020;13(5):559-565.

Pharmacokinetics of Iodine and Fluoride following Application of an Anticaries Varnish in Adults

Researchers have suggested that combining topical fluoride with an antiseptic to reduce cariogenic bacteria may be more effective than fluoride application alone in preventing dental caries. In previous studies, povidone iodine (PVP-I), a widely used bactericidal antiseptic, and sodium fluoride (NaF), used to foster remineralization of enamel, were applied sequentially topically and shown to be safe and effective. The study aim was to characterize the kinetics of iodine and fluoride following topical application of a single combination PVP-I and NaF anticaries varnish in healthy adults. Sixteen participants (aged 23 to 57 y) participated in a pharmacokinetics study following the application of 0.4 mL varnish containing 10% (w/v) PVP-I and 5% (w/v) NaF. Serum and urine samples were collected at various time points over 24 h following application of varnish. Iodine and fluoride concentrations were analyzed, and for each time point, baseline concentrations were subtracted from observed values. Following varnish application, 2 of 16 participants had nearly undetectable baseline-corrected iodine and fluoride levels, suggesting minimal absorption, lack of release of iodine and fluoride from the varnish, or inconsistent dosing. The average peak concentrations were 57 ± 33 ng/mL iodine and 60 ± 34 ng/mL (0.060 ± 0.034 ppm) fluoride and occurred within 3 h of application. The average elimination half-life was 5.5 ± 1.4 h and 3.1 ± 1.6 h for iodine and fluoride, respectively. Renal clearance of iodine and fluoride was similar to literature values. No adverse events related to the study varnish were observed by the investigative team or reported by the participants. In this study, serum fluoride and iodine transiently increased but were within normal range 24 h after application of the varnish. This study has shown that the combination of PVP-I and NaF in a proposed anticaries varnish was well tolerated. Knowledge Transfer Statement: This clinical study demonstrated that a dental varnish combining 10% (w/v) povidone iodine and 5% (w/v) sodium fluoride is well tolerated. Serum fluoride and iodine transiently increased but were within normal range after 24 h. Further studies should be conducted to assess the efficacy of a combination in preventing dental caries, especially in high-risk populations.