Adhesion of glass ionomer cements to primary dentin using a universal adhesive.

BACKGROUND: Glass ionomers are widely used for restoring carious primary teeth. However, their ability to bond to primary dentin is considered a challenge in pediatric dentistry. OBJECTIVES: The study aimed to evaluate the microshear bond strength (µSBS) of a resin-modified glass ionomer (RMGI) and a high-viscosity glass ionomer cement (Hv-GIC) to primary dentin using a universal adhesive. MATERIAL AND METHODS: Thirty human primary maxillary canines were cut in half and prepared for the µSBS test. The specimens (N = 60) were assigned to 6 groups. Three groups were defined for RMGI (FUJI II LC) and 3 groups for Hv-GIC (EQUIA Forte): with an immediately curing adhesive (G-Premio); with a delayed curing adhesive; and without an adhesive (control group). After preparing the dentin surfaces, the glass ionomers were bonded using Tygon® tubes with an internal diameter of 0.7 mm. The µSBS test was performed, and the data was analyzed using two-way analysis of variance (ANOVA) followed by Tukey's post hoc test. Additionally, the failure modes were determined using a stereomicroscope. Six specimens, one for each study group, were prepared for scanning electron microscopy (SEM) analysis to observe the glass ionomer-dentin interface. RESULTS: The type of glass ionomer did not have a significant effect on the µSBS (p = 0.305). Groups that received universal adhesive application prior to glass ionomer exhibited a significantly higher µSBS (p < 0.0001). However, there was no significant difference between the immediately curing and delayed curing groups (p = 0.157). The predominant failure mode was mixed failure. CONCLUSIONS: Higher bond strength of glass ionomers to primary teeth can be achieved by using universal adhesives, which, in addition to the proven benefits of glass ionomers, can improve their clinical success.

The impact of sugar-sweetened beverages tax on oral health-related outcomes: a systematic review of the current evidence.

Objective To provide a systematic overview of the impact of taxing sugar-sweetened beverages (SSBs) on oral health-related outcomes.Data sources For this PRISMA-compliant review, we searched PubMed, Scopus, Embase, Web of Science and Cochrane Central for relevant studies published from database inception to 27 August 2020.Data selection and extraction Two reviewers assessed the abstracts and then the full text of the studies. Primary studies that evaluated the impact of any kind of SSB tax on oral health-related outcomes (that is, decayed, missing and filled teeth, caries increment and dental treatment costs) were included.Data synthesis Of 503 search results, five studies met the inclusion criteria. All five were modelling studies, from which four studies predicted an SSB tax to have a positive impact on oral health-related outcomes, whereas one study in a developing country did not find an SSB tax to be solely successful. According to three studies, the younger population and men are likely to benefit the most from such a tax. One study demonstrated the benefits of an SSB tax to be potentially more significant among low-income individuals.Conclusion While no empirical studies are available to support the benefits of an SSB tax, the studies covered in this review altogether anticipate a positive impact. Furthermore, this review discusses some of the obstacles and limitations of implementing such a tax predicted by the included studies.

Dahaan: a framework for delivering evidence-informed dentistry recommendations and dental public health advocacy in Iran.

Although health is mostly determined by socio-political factors, the need for providing reliable health recommendations to the public should not be neglected. There has been a considerable void in delivering evidence-informed oral health recommendations in Iran; whilst there is a significant gap in oral health knowledge among socioeconomic classes, recommendations are neither fully compatible with each other nor up-to-date. To fill in this void, we started Dahaan (meaning "mouth" in Persian) with the aim of providing the latest easily accessed evidence-informed dentistry recommendations and advocating dental public health in the Iranian community. In this paper, we as the authors present the performance and achievements of this group, which is a member of the NCD Alliance and the Informed Health Choices project with a reasonable number of readers across the country, and illustrate the way ahead towards our goals.

Quality Assessment of Studies Included in Cochrane Oral Health Systematic Reviews: A Meta-Research.

OBJECTIVES: To assess the Risk of Bias (RoB) and other characteristics of published randomised clinical trials within Cochrane oral health systematic reviews. MATERIALS AND METHODS: All the published clinical trials within Cochrane oral health systematic reviews until 1 June 2020 were identified and examined. RoB was assessed for all the included clinical trials according to the Cochrane review standards. The Overall Risk of Bias (ORoB) was defined in this study using Cochrane's RoB tool-v2. Descriptive analyses were carried out to determine the frequency of each variable in the study sample. RESULTS: Out of a total of 2565 included studies, the majority (n = 1600) had sample sizes of 50 or higher. Regarding blinding, 907 studies were labelled as double-blind. Among the various domains of bias, the performance bias showed the highest rate of high risk (31.4%). Almost half of the studies had a high ORoB, compared to 11.1% with a low ORoB. The studies that used placebos had a higher percentage of low ORoB (14.8% vs. 10.7%). Additionally, the double- and triple-blind studies had higher percentages of low ORoB (23.6% and 23.3%, respectively), while the studies with a crossover design had the highest percentage of low ORoB (28.8%). CONCLUSION: The RoB of oral health studies published as Cochrane reviews was deemed high.