Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,890 questions · 3,917 findings · 272 reviews · Oral Health

No studies found 429 · 11%GRADE not reported 2,657 · 67.8%Very low 512 · 13.1%Low 219 · 5.6%Moderate 80 · 2%High 20 · 0.5%

Breastfeeding vs No breastfeeding

Early childhood caries (ECC) · Preschool children (<6 years)

After excluding five studies, breastfeeding was associated with lower ECC risk in cohort studies (RR 0.82, 95% CI 0.71 to 0.95; I²=0%).

3 findings from 1 review

Breastfeeding <12 months vs Breastfeeding for ≥12 months

Early childhood caries (ECC) · Preschool children (<6 years)

Breastfeeding for <12 vs ≥12 months was associated with significantly fewer caries (RR 0.65, 95% CI 0.50-0.86), indicating breastfeeding beyond 12 months increases ECC risk (substantial heterogeneity; ungraded).

2 findings from 1 review

Surgery plus Heister jaw opener vs Surgery plus wooden tongue depressors

Maximal mouth opening (interincisal distance) · People of any age with a confirmed diagnosis, by clinical examination and biopsy, of oral submucous fibrosis (OSF)

It is very uncertain whether surgery plus Heister jaw opener changes maximal mouth opening (interincisal distance) compared with surgery plus wooden tongue depressors (very low certainty).

2 findings from 1 review

Postoperative systemic antibiotics (phenoxymethylpenicillin/penicillin VK, 7-day course), partial or total chemo-mechanical debridement and analgesics vs Matched placebo, partial or total chemo-mechanical debridement and analgesics

Pain at 48 hours · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)

Postoperative systemic antibiotics… showed no clear difference in pain at 48 hours compared with matched placebo, partial or total chemo-mechanical debridement and…; GRADE not reported.

1 finding from 1 review

Postoperative systemic antibiotics (phenoxymethylpenicillin/penicillin VK, 7-day course), partial or total chemo-mechanical debridement and analgesics vs Matched placebo, partial or total chemo-mechanical debridement and analgesics

Pain at 72 hours · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)

It is very uncertain whether postoperative systemic antibiotics… changes pain at 72 hours compared with matched placebo, partial or total chemo-mechanical debridement and… (very low certainty).

1 finding from 1 review

Fixed orthodontic treatment with fixed (multibracket) appliances (exposure) vs None (single-group prevalence/incidence estimate)

Association between patient age and number of ICLs · Patients (permanent dentition) during or after fixed orthodontic treatment with fixed (multibracket) appliances

Patient age was not significantly associated with the number of ICLs (ungraded).

1 finding from 1 review

Postoperative systemic antibiotics (phenoxymethylpenicillin/penicillin VK, 7-day course), partial or total chemo-mechanical debridement and analgesics vs Matched placebo, partial or total chemo-mechanical debridement and analgesics

Percussion pain at 72 hours · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)

Postoperative systemic antibiotics… showed no clear difference in percussion pain at 72 hours compared with matched placebo, partial or total chemo-mechanical debridement and…; GRADE not reported.

1 finding from 1 review

Breastfeeding <18 months vs Breastfeeding for ≥18 months

Early childhood caries (ECC) · Preschool children (<6 years)

Breastfeeding for <18 vs ≥18 months was associated with significantly fewer caries (RR 0.41, 95% CI 0.18-0.92; substantial heterogeneity; ungraded).

2 findings from 1 review

Genome-wide common variants (aggregate additive; LD score regression) vs Not applicable (variance-component estimate)

Periodontal disease - SNP-based heritability · Japanese adults (present-study cohort)

SNP-based heritability of periodontal disease was low (h2=0.0519, SE 0.0182); ungraded.

1 finding from 1 review

Postoperative systemic antibiotics (phenoxymethylpenicillin/penicillin VK, 7-day course), partial or total chemo-mechanical debridement and analgesics vs Matched placebo, partial or total chemo-mechanical debridement and analgesics

Percussion pain at 7 days · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)

Postoperative systemic antibiotics… showed no clear difference in percussion pain at 7 days compared with matched placebo, partial or total chemo-mechanical debridement and…; GRADE not reported.

1 finding from 1 review

Breastfeeding for <4 months vs Breastfeeding for ≥4 months

Early childhood caries (ECC) · Preschool children (<6 years)

Breastfeeding for <4 vs ≥4 months was not significantly associated with early childhood caries (RR 0.95, 95% CI 0.80-1.13; ungraded).

1 finding from 1 review

Surgery plus Heister jaw opener vs Surgery plus wooden tongue depressors

Burning sensation (VAS 0-100) · People of any age with a confirmed diagnosis, by clinical examination and biopsy, of oral submucous fibrosis (OSF)
1 finding from 1 review
  • Vadepally 2019 measured burning sensation on a VAS but did not fully report results, stating there was no significant difference between the 2 groups (p=0.617).
    1 study · 50 participants
    GRADE not reported

Postoperative systemic antibiotics (phenoxymethylpenicillin/penicillin VK, 7-day course), partial or total chemo-mechanical debridement and analgesics vs Matched placebo, partial or total chemo-mechanical debridement and analgesics

Adverse effects · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)
1 finding from 1 review

Fixed orthodontic treatment with fixed (multibracket) appliances (exposure) vs None (single-group prevalence/incidence estimate)

Association between orthodontic treatment duration and ICLs incidence · Patients undergoing fixed orthodontic treatment with fixed (multibracket) appliances, followed for development of new ICLs

ICLs incidence increased with longer orthodontic treatment duration (meta-regression P<.01; ungraded).

1 finding from 1 review

Breastfeeding for <6 months vs Breastfeeding for ≥6 months

Early childhood caries (ECC) · Preschool children (<6 years)

In cohort studies, breastfeeding for <6 vs ≥6 months was not significantly associated with early childhood caries (RR 0.97, 95% CI 0.88-1.06; ungraded).

2 findings from 1 review

Genome-wide common variants (aggregate additive; LD score regression) vs Not applicable (variance-component estimate)

Dental caries - SNP-based heritability · Japanese adults (present-study cohort)

SNP-based heritability of dental caries was low (h2=0.0258, SE 0.0155); ungraded.

1 finding from 1 review

Postoperative systemic antibiotics (phenoxymethylpenicillin/penicillin VK, 7-day course), partial or total chemo-mechanical debridement and analgesics vs Matched placebo, partial or total chemo-mechanical debridement and analgesics

Pain at 7 days · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)

It is very uncertain whether postoperative systemic antibiotics… changes pain at 7 days compared with matched placebo, partial or total chemo-mechanical debridement and… (very low certainty).

1 finding from 1 review