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Evidence found and GRADE certainty

2,745 questions · 4,389 findings · 203 reviews · Oral Health

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No studies found 39 · 0.9%GRADE not reported 3,844 · 87.6%Very low 198 · 4.5%Low 137 · 3.1%Moderate 134 · 3.1%High 37 · 0.8%

Hydroxyapatite (e.g., nano-HAp) vs HEMA/EGDMA-based desensitizer

Immediate (24 h) resin-dentin bond strength (MPa) · Artificial caries-affected dentin (ACAD) in extracted permanent human teeth (in vitro)

In the Self-Etch adhesive + chemical ACAD protocol network, HAp vs HEMA showed no significant difference in 24 h bond strength (MD -4.815, 95% CI -10.709 to 1.079; Moderate certainty).

1 finding from 1 review

Theory-based oral health education/promotion interventions (HBM, TPB, SCT, HAPA, TTM, PMT, SOC, PRECEDE-PROCEED, MI) vs Control (waitlist, routine/standard oral health education, or minimal intervention)

Oral health behaviour (1-9 scale) · school‐age children and adolescents

Theory-based interventions significantly improved oral health behavior (SMD 2.58; low certainty), with very high heterogeneity.

1 finding from 1 review

Quantitative light-induced fluorescence (QLF) vs Reference standard (bitewing radiography, ADA classification, ICDAS II)

Occlusal caries detection: sensitivity · Patients (in vivo); permanent and primary teeth, occlusal surfaces

In vivo, QLF pooled sensitivity for occlusal caries detection was 0.86 (4 studies; ungraded).

2 findings from 1 review

Ion-releasing restorations (IRR): RMGIC, HVGIC, GIC, compomer/PMRC, giomer vs Composite resin (CR), including bulk-fill composite

Adequate color or translucency · Children receiving dental restorations (aged 4-11 years; primary teeth; Class I/II/V cavities)

No significant difference between IRR and CR in color or translucency (moderate certainty; downgraded for inconsistency).

1 finding from 1 review

Genetically predicted periodontitis vs Lower genetically predicted periodontitis liability

Femoral neck bone mineral density (FN-BMD) · European-ancestry adults

Genetically predicted periodontitis had no causal effect on femoral neck BMD.

1 finding from 1 review

Genetically predicted DMFS (dental caries) vs Reference (1-SD lower genetically predicted DMFS)

Femoral neck bone mineral density (FN-BMD) · European-ancestry adults

Genetically predicted dental caries (DMFS) had no causal effect on femoral neck BMD.

1 finding from 1 review

Genetically predicted periodontitis vs Lower genetically predicted periodontitis liability

Femur fracture · European-ancestry adults

Genetically predicted periodontitis had no causal effect on fracture of femur (multivariable MR, OR 1.034).

2 findings from 1 review

Dental caries vs Caries-free status

Relative abundance of S. mutans in saliva · Systemically healthy individuals (children and adults, aged 40 months to 50 years) assessed for dental caries

The relative abundance of S. mutans in saliva is significantly higher in caries-active than caries-free individuals (pooled SMD 1.48, 95% CI 0.45 to 2.50), but heterogeneity is very high (I2=90%); ungraded.

1 finding from 1 review

Anticaries vaccine or antibody (DNA, recombinant protein, nanoparticle-adjuvanted, live-vector, plant-based, or passive IgY immunization) targeting S. mutans vs Control (unvaccinated / empty vector / PBS / placebo animals)

Serum IgG antibody response (immunogenicity) · Animal caries models (mice, rats, hamsters) challenged/colonized with Streptococcus mutans; one transgenic-plant antigen-expression system

Anticaries vaccines elicited increased serum IgG antibody responses across the animal studies (ungraded narrative synthesis; no pooled estimate).

1 finding from 1 review

All European countries pooled (overall) vs None (overall pooled prevalence)

Caries experience (mean DMFT) · 12-year-old children across European countries (national/regional epidemiological surveys, 2011-2022)

Across European countries the overall pooled mean DMFT in 12-year-olds was 2.10 (95% CI 1.63 to 2.57), with very high between-country heterogeneity (I2=100%); not GRADE-rated.

1 finding from 1 review

Higher drinking-water fluoride exposure vs Null / lowest drinking-water fluoride exposure (reference)

Hip/femoral bone mineral density (BMD) · general population

Hip BMD increased with fluoride in both sexes (linearly in males, non-linearly above ~1.2 mg/L in females); no numeric MD reported in text for the main analysis; ungraded.

1 finding from 1 review
  • The association of fluoride exposure with bone density and fracture risk: a dose-response meta-analysis. 2025 All outcomes
    Long-term / lifetime fluoride exposure · General population; 37 observational studies (1944-2024), predominantly North America (USA, Canada) and Northern Europe (Finland, Sweden), plus UK, Poland, Italy, Germany, China, Taiwan, South Korea, Ethiopia; exposure mainly community drinking-water fluoride · Both sexes, main dose-response
    Hip BMD increased in both sexes, linearly in males and non-linearly (starting above 1.2 mg/L) in females (no numeric MD reported in text for main analysis)
    Studies not reported
    GRADE not reported

Older child age (months) vs Younger age (reference)

Early childhood caries (ECC) · Children aged 0-5 years in North Africa

Age 48-59 months was associated with higher odds of ECC (OR 2.602).

2 findings from 1 review