Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

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

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%

Genetically predicted gene expression (TWAS; S-PrediXcan with GTEx v8 cis-eQTL across 49 tissues; cross-tissue S-MultiXcan) vs ECC-unaffected children (association of genetically predicted expression)

Early childhood caries (ECC) - association with genetically predicted expression of TAS2R43 (chr12p13.2) · Children up to age 5-6 years (European / European non-Hispanic ancestry); 843 ECC-affected vs 2124 unaffected across 5 cohorts (N=2974)

Genetically predicted expression of TAS2R43 was significantly associated with ECC in the TWAS (p = 8.78e-8); genetic association, ungraded.

1 finding from 1 review

Dental caries (carious oral microbiome) vs Caries-free / healthy oral microbiome

Differential microbial abundance / taxa predictive of caries · Individuals providing oral (saliva/supragingival plaque) 16S rRNA microbiome samples; 2016 samples from 19 studies (mixed children and…

A group of genera/species (notably Selenomonas, Aggregatibacter, Actinomyces, Treponema) was predictive of caries, whereas Streptococcus was not (ungraded).

1 finding from 1 review
  • Meta-analysis of caries microbiome studies can improve upon disease prediction outcomes. 2022 All outcomes
    Oral cavity microbiome (saliva and supragingival plaque samples); pooled across 19 international studies
    Mean-decrease-accuracy discriminating taxa: Capnocytophaga HMT-338, Lactobacillus panis, Treponema HMT-230, Bifidobacterium longum, Delftia acidovorans, Staphylococcus schleiferi; higher log2FC in caries: Selenomonas HMT-146, Aggregatibacter actinomycetemcomitans, Actinomyces HMT-896, Treponema HMT-257; Streptococcus not predictive
    19 studies · 2016 participants
    GRADE not reported

Composite resin vs Light-cured compomer (polyacid-modified composite resin)

Restoration failure · Children with carious primary teeth after vital or non-vital pulp therapy

In one RCT, composite resin had an annual failure rate of 0% after 2 years.

1 finding from 1 review

Non-responsive complementary feeding (NRCF) vs Other models of complementary feeding

Weight gain · Healthy, term-born, normal-birth-weight infants aged 4-24 months (breastfed and/or formula-fed) in Western industrialized countries

Narratively, restrictive NRCF style tended to favor excess weight and coercive/pressuring style tended to favor lower weight (3 of 5 studies each; ungraded).

1 finding from 1 review

Total daily fluoride intake (TDFI) and daily fluoride intake from toothpaste

Correlation between daily urinary fluoride excretion (DUFE) and fluoride intake · Children and adults with 24-h urinary fluoride monitoring (9 studies reporting both intake and urine; Table 2)

Daily urinary fluoride excretion was not correlated with total daily fluoride intake or with fluoride intake from toothpaste (R2 < 0.07), based on nine studies (ungraded).

1 finding from 1 review
  • Fluoride Intake Through Dental Care Products: A Systematic Review. 2022 All outcomes
    24-h urine collection · Multiple countries (28 studies; ~43% conducted in Brazil); community/general-population settings · High-fluoride-area data from Idowu et al. [46,47] excluded
    R2 (coefficient of determination) <0.07
    9 studies
    GRADE not reported

Not applicable (single-group prevalence) vs Not applicable

Dental caries prevalence · Children aged 12 years (plus or minus one year) in Africa

The pooled dental-caries prevalence was 0.3657 (95% CI 0.3065 to 0.4250); GRADE was not reported.

2 findings from 1 review

Genetically predicted gene expression (TWAS; S-PrediXcan with GTEx v8 cis-eQTL across 49 tissues; cross-tissue S-MultiXcan) vs ECC-unaffected children (association of genetically predicted expression)

Early childhood caries (ECC) - association with genetically predicted expression of SMIM10L1 (chr12p13.2) · Children up to age 5-6 years (European / European non-Hispanic ancestry); 843 ECC-affected vs 2124 unaffected across 5 cohorts (N=2974)

Genetically predicted expression of SMIM10L1 was significantly associated with ECC in the TWAS (p = 1.70e-7); genetic association, ungraded.

1 finding from 1 review

Dental caries (carious oral microbiome) vs Caries-free / healthy oral microbiome

Alpha diversity (Chao1, Observed, Shannon) · Adults providing oral (saliva/supragingival plaque) 16S rRNA microbiome samples

In adults, caries-vs-health alpha diversity differed for the Shannon index but not Chao1/Observed (ungraded).

1 finding from 1 review

Maternal education attainment vs Children without dental caries

Dental caries (association with no formal maternal education) · Children (deciduous and/or permanent dentition) in low- and middle-income countries

No formal maternal education showed a non-significant trend toward higher odds of dental caries (OR 1.34, 95% CI 0.76 to 2.36; 3 studies; not GRADE-rated).

1 finding from 1 review

Composite resin with etch-and-rinse (total-etch) adhesion vs Composite resin with self-etch adhesion (same universal adhesive)

Treatment failure (annual failure rate) · Children with moderately deep dentine caries in primary molars, no pulp therapy

Etch-and-rinse adhesion failed more than self-etch (19.5% vs 7.0% annual failure) in one RCT; low quality of evidence (ungraded).

1 finding from 1 review

Amalgam restoration vs Composite resin, compomer, conventional glass-ionomer cement, or resin-modified GIC (head-to-head RCT comparators)

Treatment failure (annual failure rate) · Children with previously unrestored, vital carious lesions in primary teeth (no pulp therapy); aged 1.5-11 years

Amalgam restorations in primary teeth showed a wide annual failure rate (1-28%) across 4 RCTs; the evidence is of low quality (high risk of bias; ungraded).

1 finding from 1 review

Composite strip crown (CSC) with a post (microhybrid composite resin, Amelogen) vs Post type: composite post (CP) vs fibre post (FP) vs reverse metal post (RMP)

Treatment failure (annual failure rate) · Children with severely decayed maxillary primary incisors treated by pulpectomy (non-vital pulp therapy)

Composite strip crowns with composite posts had a low annual failure rate (2.3%) in maxillary primary incisors after pulpectomy (single high-risk-of-bias RCT; low quality of evidence; not GRADE-rated).

3 findings from 1 review

Living with HIV and undergoing antiretroviral therapy (ART/HAART) vs Healthy HIV-negative controls

Dental development / dental age (mineralization chronology) · Children or adolescents

No significant overall difference in dental development between CLWH on ART and healthy controls (three studies, narrative synthesis).

1 finding from 1 review

Resin-modified glass ionomer cement for bonding orthodontic brackets vs Resin composite restoration

Restoration failure · Children with carious primary teeth

No comparative effect estimate was reported; both arms had 16% failure.

1 finding from 1 review

Ion-releasing restoration, glass ionomer-based (conventional GIC, HV-GIC, RMGIC, glass hybrid) vs Resin composite restoration

Marginal adaptation (unacceptable marginal adaptation) · Patients with permanent dentition in need of restorations (all cavity types: Black's Class I, II, V, and non-carious cervical lesions)

Across follow-up periods, there was no statistically significant difference in unacceptable marginal adaptation between GIC and resin composite restorations.

6 findings from 1 review
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