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Topical fluoride significantly reduces dental caries incidence in children and adolescents with OR 0.27Topical fluoride treatments significantly reduce tooth decay in children

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Key Takeaway
Note that topical fluoride treatments significantly reduce caries incidence in children and adolescents.

This meta-analysis synthesized data from 10 clinical studies to evaluate the efficacy of various topical fluoride treatments, including mouth rinses, toothpaste, gels, foams, and varnishes, in children and adolescents. The primary outcome of caries incidence was significantly reduced with an OR of 0.27 (95% CI: 0.21-0.36, p 0.00001).

Secondary outcomes also showed significant improvements. The DMFS increment was prevented with a WMD of 0.35 (95% CI: 0.07-0.63, p = 0.01). Additionally, SIC changes were reduced with a WMD of -0.85 (95% CI: -1.66 to -0.05, p = 0.04).

The authors noted limitations including a limited number of study-level estimates for DMFS and SIC for meta-regression, as well as limited reporting of safety outcomes. Despite these limitations, the findings suggest that topical fluoride is highly effective for preventing dental caries in the pediatric population. Clinical application supports the continued use of supervised topical fluoride treatments for caries prevention in children and adolescents.

How this fits prior evidence

This meta-analysis confirms the protective effects of certain interventions against dental caries, complementing the finding that dairy products and bioactive components provide multiple protective effects against dental caries and periodontitis. While the current study focuses on topical fluoride, it addresses the clinical need for effective caries prevention in children, including those who may have higher DMFT indices due to conditions like Type 1 Diabetes Mellitus.

Protecting a child's smile can be a constant worry for parents. Cavities, or dental caries, are a common struggle for kids, but research shows a clear way to fight back. A review of 10 clinical studies confirms that topical fluoride treatments are highly effective at reducing the number of cavities in children and adolescents.

These treatments include common forms like mouth rinses, toothpaste, gels, foams, and varnishes. The data shows these methods significantly lower the risk of decay and help prevent the spread of cavities across the mouth. The study specifically looked at how these treatments impact the amount of decayed surfaces and the number of new cavities formed.

While the evidence strongly supports using these treatments, the study did have some limitations. There was limited reporting on safety outcomes and a small number of estimates for certain specific measurements. However, the findings still provide strong support for using supervised fluoride treatments to keep children's teeth healthy.

What this means for you:
Topical fluoride treatments like rinses and varnishes significantly reduce the risk of cavities in children.

Common questions

What types of fluoride treatments are effective for kids?

Several types of topical fluoride treatments are effective for children and adolescents. These include mouth rinses, toothpaste, gels, foams, and varnishes. The research shows these methods significantly reduce the incidence of dental caries, which are commonly known as cavities.

How effective is fluoride at preventing cavities?

The data shows that topical fluoride treatments significantly reduce the risk of cavities. Specifically, the study found a significant reduction in the incidence of dental caries and helped prevent the increase of decayed surfaces in the mouths of children and adolescents.

Are there any safety concerns with fluoride for children?

The study did not identify any serious adverse events for the children and adolescents who received topical fluoride treatments. However, there was limited reporting on general safety outcomes in the data, so you should always talk to your dentist about the best plan for your child.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedSep 2026
View Original Abstract ↓
OBJECTIVE: This study aims to assess the effectiveness of topical fluoride treatments, including mouth rinses, toothpaste, gels, foams and varnish, in preventing dental caries in children and adolescents through a systematic review and meta-analysis. It primarily focuses on the impact of different intervention frequencies, durations, concentrations, and types of fluoride on the incidence of dental caries and on changes in decayed, missing and filled surfaces (DMFS) and the surface area of initial caries (SIC) indices. METHODS AND MATERIALS: Clinical intervention studies that met the inclusion criteria were identified through searches of PubMed, Embase, Web of Science, Cochrane Library, ScienceDirect, SinoMed, Chinese National Knowledge Infrastructure and Wanfang databases. The literature search was conducted on 2 June 2025 and covered publications between 1 January 2000 and 31 May 2025. Two independent reviewers performed literature screening, data extraction and risk-of-bias assessment. A meta-analysis was performed using fixed-effects or random-effects models. Subgroup analyses and narrative heterogeneity exploration were conducted according to fluoride concentration, intervention frequency, duration, age group and control type. Safety outcomes were narratively summarised. RESULTS: The meta-analysis of 10 included clinical studies showed that topical fluoride significantly reduced caries incidence when the event was defined as development of dental caries (odds ratio [OR] = 0.27, 95% CI: 0.21-0.36, p 0.00001), prevented DMFS increment (weighted mean difference [WMD] = 0.35, 95% CI: 0.07-0.63, p = 0.01) and reduced SIC changes (WMD = -0.85, 95% CI: -1.66 to -0.05, p = 0.04). Subgroup analyses indicated superior outcomes with 0.2% fluoride, higher intervention frequency and longer duration. The 5% sodium fluoride varnish study was summarised separately because it used a professionally applied varnish and delayed-varnish control. Safety reporting was limited, and no serious fluoride-related adverse events were identified in the available reports. Formal meta-regression was not performed because the number of study-level estimates for DMFS and SIC was limited. CONCLUSION: Topical fluoride is highly effective in preventing dental caries in children and adolescents. The findings support sustained and appropriately supervised use of topical fluoride, while highlighting the need for standardised protocols and better long-term safety reporting.
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