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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%

GG genotype of ENAM rs1264848 vs AA + AG genotype of ENAM rs1264848

Dental caries susceptibility · Individuals assessed for dental caries (cases with caries/high caries vs. caries-free or low/very-low-caries controls)

No significant association between GG genotype vs AA + AG genotype of ENAM rs1264848 and dental caries susceptibility (GG vs AA + AG model: OR 1.09, 95% CI 0.53-2.23) in the Ethnicity: Mixed subgroup; certainty not graded.

6 findings from 1 review
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Intraglandular botulinum neurotoxin (BoNT) injection vs No BoNT (placebo or pre-treatment baseline)

Salivary S. mutans level · Patients with drooling (sialorrhea) due to neurological disease

BoNT injections were not associated with significant changes in salivary S. mutans counts across three studies (ungraded; no effect estimate reported).

1 finding from 1 review
  • Oral health effects of botulinum toxin treatment for drooling: a systematic review. 2020 All outcomes
    Before vs after BoNT injection · Neurological-disease populations with drooling (e.g., cerebral palsy, Parkinson disease, adults with sialorrhea); specialist clinical care
    The RCT by Wu et al. reported no statistically significant changes in S. mutans CFU counts (p-values only). The studies of Tiigimae-Saar did not find statistically significant differences in S. mutans CFU counts either.
    3 studies
    GRADE not reported

Multiple LTF gene variants (joint / gene-based) vs Caries-free controls

Dental caries · Individuals assessed for dental caries (cases with caries/high caries vs. caries-free or low/very-low-caries controls)

A gene-based analysis indicated that multiple LTF variants were jointly associated with dental caries risk (weighted TPM P = 0.0007; no pooled effect estimate; ungraded).

1 finding from 1 review

TT genotype of AMELX rs2106416 vs CC + CT genotype of AMELX rs2106416

Dental caries susceptibility · Individuals assessed for dental caries (cases with caries/high caries vs. caries-free or low/very-low-caries controls)

No significant association between TT genotype vs CC + CT genotype of AMELX rs2106416 and dental caries susceptibility (TT vs CC + CT model: OR 1.67, 95% CI 0.44-6.34) in the Ethnicity: Caucasian subgroup; certainty not graded.

3 findings from 1 review

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Number of natural teeth (missing/present teeth, edentulousness, MT component of DMFT) · General population (children and adults) assessed for dental hard-tissue health

Evidence on the number of natural teeth was conflicting and could not be pooled (ungraded).

1 finding from 1 review
  • Vegetarian diet and its possible influence on dental health: A systematic literature review. 2020 All outcomes
    Multiple countries (mostly India; also Finland and other European countries, Brazil, Trinidad and Tobago); community and clinical settings
    Seven studies reported on the number of teeth with conflicting findings; meta-analysis was not possible due to inconsistent outcome definitions. One study found vegetarians had significantly more teeth; two found no…
    7 studies
    GRADE not reported

Tooth bleaching (carbamide or hydrogen peroxide; home and/or in-office) vs No bleaching (untreated or pH-cycling control)

Caries susceptibility, enamel demineralisation, erosion, or microhardness · Permanent teeth / enamel specimens (in vitro)

Low-quality in vitro evidence suggests that bleaching of permanent teeth does not increase susceptibility to caries, demineralisation or erosion (ungraded); the clinical question could not be answered because only in vitro studies were available.

1 finding from 1 review

Intervention not reported

Dental caries in primary teeth · Children (primary dentition) worldwide

In Australia, the pooled prevalence of primary-teeth caries in children was 28.5% (95% CI 20.3 to 38.5); certainty not graded.

1 finding from 1 review

AG + GG genotype (G-allele carriers) of ENAM rs1264848 vs AA genotype of ENAM rs1264848

Dental caries susceptibility · Individuals assessed for dental caries (cases with caries/high caries vs. caries-free or low/very-low-caries controls)

No significant association between AG + GG genotype (G-allele carriers) vs AA genotype of ENAM rs1264848 and dental caries susceptibility (AG + GG vs AA model: OR 1.69, 95% CI 0.78-3.68) in the Ethnicity: Mixed subgroup; certainty not graded.

6 findings from 1 review
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Intervention not reported

Dental caries in permanent teeth · Children (permanent dentition) worldwide

In Africa, the pooled prevalence of permanent-teeth caries in children was 58.9% (95% CI 29.4 to 83.1); certainty not graded.

1 finding from 1 review