Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,954 questions · 2,335 findings · 149 reviews · Oral Health

No studies found 436 · 18.7%GRADE not reported 1,370 · 58.7%Very low 254 · 10.9%Low 173 · 7.4%Moderate 80 · 3.4%High 22 · 0.9%

Primary school-based interventions (one or more of: school health policy, oral health education, healthy school environment, access to oral health services, community involvement) vs usual practice

Caries increment, tooth index D(M)FT · Primary school children (aged 3-16 years) attending primary school in low- and middle-income countries (LMICs)

Among children aged 5-8 years, net increment in DMFT was not significantly reduced (SMD -0.36); no significant subgroup difference by age.

3 findings from 1 review

Autopolymerised sealant vs Light polymerised sealant

Development of >=1 new carious lesion (caries incidence) · Children with sound primary molars, aged 2-4 years (municipal dental clinics or hospital paediatric clinics, Denmark)

It is very uncertain whether autopolymerised sealant changes development of >=1 new carious lesion (caries incidence) compared with light polymerised sealant (very low certainty).

1 finding from 1 review

30% silver diamine fluoride vs Atraumatic restorative treatment (ART)

Patient discomfort during treatment (anxiety scale) · Children (age 1-10 years) with active cavitated dentin caries lesions in primary molars

One study found no significant difference in patient discomfort between SDF and ART (p = 0.15; ungraded).

1 finding from 1 review

Conventional GIC vs Amalgam or metal-reinforced GIC

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

Conventional GIC had an annual failure rate of 7.6-16.6% (2 RCTs) and failed more than amalgam in one trial; low quality of evidence (ungraded).

1 finding from 1 review

CBT vs inactive control (usual care care, attention control, waitlist)

Mental distress · People aged 12 years and over with painful TMD lasting 3 months or longer

Cognitive behavioural therapy (CBT) showed no clear difference in psychological distress at follow-up compared with usual care, waiting list or no treatment (control) (low certainty).

2 findings from 1 review

Single-visit root canal treatment vs Multiple-visit root canal treatment (two or more visits)

Pain at 12 months or more (long-term postobturation pain) · People aged 10 years or above requiring root canal treatment; permanent teeth with completely formed apex and without internal resorption
1 finding 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 LACC1 (chr13q14.11) · 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 LACC1 expression reached the TWAS threshold for ECC (p = 3.98e-5) but was flagged as a possible false positive (LD misspecification) and not further considered; ungraded.

1 finding from 1 review

Hall technique vs Compomer restoration or non-restorative caries treatment

Treatment failure (annual failure rate) · Children (aged 3-8 years) with 2-surface occluso-proximal dentine caries in primary molars, no pulp therapy

Preformed metal (Hall) crowns had a low reported annual failure rate (3.1%) versus compomer (14.7%) in one RCT; low quality of evidence (ungraded).

1 finding 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 NRAD1 (LINC00284) (chr13q14.11) · 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 NRAD1 (LINC00284) expression reached the TWAS threshold for ECC (p = 1.69e-6) but was flagged as a possible false positive (LD misspecification) and not further considered; ungraded.

1 finding from 1 review

Silver diamine fluoride (SDF; 30% or 38%) vs Atraumatic restorative treatment (ART)

Caries arrest · Children (age 1-10 years) with active cavitated dentin caries lesions in primary molars

SDF was not significantly better than ART at arresting caries (pooled ES 0.05, 95% CI -0.42 to 0.51; ungraded).

1 finding 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 TAS2R31 (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 TAS2R31 was suggestively associated with ECC in the TWAS (p = 1.04e-5); genetic association, ungraded.

1 finding from 1 review

Composite resin vs Compomer, glass-ionomer/RMGIC, amalgam, or glass carbomer

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

Composite resin (hybrid 0-19.5%; bulk-fill 0-16.9%) performed comparably to or better than most alternatives across 11 RCTs; evidence is of low to unclear quality (ungraded).

1 finding from 1 review

Single-visit root canal treatment vs Multiple-visit root canal treatment (two or more visits)

Sinus or fistula formation at last · People aged 10 years or above requiring root canal treatment; permanent teeth with completely formed apex and without internal resorption

It is very uncertain whether single-visit root canal treatment changes sinus tract or fistula formation compared with multiple-visit root canal treatment (two or more visits) (very low certainty).

1 finding from 1 review

Periodontal treatment (subgingival instrumentation, with or without antimicrobials/surgery) vs usual care or no treatment

Diabetic complications · People with diabetes mellitus (type 1 or type 2, mostly type 2) and periodontitis, at least 16 years of age

The review found no eligible studies for this question.

1 finding from 1 review