Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,297 questions · 3,638 findings · 215 reviews · All outcomes

No studies found 98 · 2.7%GRADE not reported 2,946 · 81%Very low 263 · 7.2%Low 158 · 4.3%Moderate 137 · 3.8%High 36 · 1%

Populations with a lower proportion of university-educated people (<33.78% with university level) vs Populations with a higher proportion of university-educated people (>=33.78% with university level)

Caries experience (mean DMFT) · Adults aged 19-60 years

The proportion of university-educated people was not associated with caries experience (DMFT); pooled DMFT was similar across subgroups and the meta-regression was non-significant; ungraded observational evidence.

5 findings from 1 review
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HDI (quantitative) vs Populations in countries with a higher Human Development Index (very high, HDI >=0.800)

Caries experience (mean DMFT) · Adults aged 19-60 years

Pooled caries experience (DMFT) was similar in very-high-HDI and high-HDI countries, and meta-regression found no significant association between national HDI and DMFT; ungraded observational evidence with very high heterogeneity.

3 findings from 1 review

Populations with a low level of schooling (>=33.60% of the population with low schooling) vs Populations with a higher level of schooling (<33.60% of the population with low schooling)

Caries experience (mean DMFT) · Adults aged 19-60 years

Population level of schooling was not significantly associated with caries experience (DMFT) in subgroup meta-analysis or meta-regression; ungraded observational evidence with very high heterogeneity.

5 findings from 1 review
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Higher circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower circulating 25-hydroxyvitamin D (25(OH)D) concentration

Metabolic syndrome (prevalent) · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Metabolic syndrome (prevalent): OR 0.49 (95% CI 0.38 to 0.64), statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Metronidazole + SRP vs SRP

Probing pocket depth · Adults with periodontitis (chronic and aggressive)

It is very uncertain whether metronidazole + SRP changes probing pocket depth compared with SRP (very low certainty).

3 findings from 1 review

Metronidazole + SRP vs SRP

Percentage of bleeding on probing (BOP) · Adults with periodontitis (chronic and aggressive)

It is very uncertain whether metronidazole + SRP changes percentage of bleeding on probing (BOP) compared with SRP (very low certainty).

3 findings from 1 review

Metronidazole + SRP vs SRP

Percentage of closed pockets · Adults with periodontitis (chronic and aggressive)

It is very uncertain whether metronidazole + SRP changes percentage of closed pockets compared with SRP (very low certainty).

3 findings from 1 review

Metronidazole + SRP vs SRP

Adverse events · Adults with periodontitis (chronic and aggressive)

It is very uncertain whether metronidazole + SRP changes adverse events compared with SRP (very low certainty).

1 finding from 1 review

Metronidazole + SRP vs SRP

Clinical attachment level (CAL) · Adults with periodontitis (chronic and aggressive)

Metronidazole + SRP showed no clear difference in clinical attachment level (CAL) compared with SRP; GRADE not reported.

3 findings from 1 review

Preformed metal crown (PMC) vs Resin-modified glass-ionomer cement + composite resin (modified open-sandwich restoration)

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

In one RCT, preformed metal crowns had an annual failure rate of 2.5% after 2 years.

1 finding from 1 review

Intralesional betamethasone vs placebo

Maximal mouth opening (interincisal distance) · People of any age with a confirmed diagnosis, by clinical examination and biopsy, of oral submucous fibrosis (OSF)
1 finding from 1 review
  • Goel 2015 (3-arm: intralesional betamethasone vs lycopene vs placebo, 90 per arm): appeared to show increased interincisal distance in both intervention groups vs placebo, but only between-group differences with no…
    1 study · 180 participants
    GRADE not reported

Preformed metal crown (PMC) vs Resin-modified glass-ionomer cement + composite resin (modified open-sandwich restoration)

Treatment failure (annual failure rate) · Children with carious primary molars treated by pulpotomy (vital pulp therapy)

Preformed metal crowns had a low annual failure rate (2.5%) in primary molars after pulpotomy, but the evidence is of low quality (single high-risk-of-bias split-mouth RCT; not GRADE-rated).

2 findings from 1 review

Intralesional betamethasone vs intralesional injections of triamcinolone acetonide

Clinical resolution · People with symptomatic, biopsy-confirmed oral lichen planus (OLP); not concurrently receiving other OLP treatment

Intralesional betamethasone may leads to higher clinical resolution compared with intralesional triamcinolone acetonide (low certainty).

1 finding from 1 review

Intralesional betamethasone vs intralesional injections of triamcinolone acetonide

Clinical score (14 days) · People with symptomatic, biopsy-confirmed oral lichen planus (OLP); not concurrently receiving other OLP treatment

It is very uncertain whether intralesional betamethasone changes clinical score (14 days) compared with intralesional triamcinolone acetonide (very low certainty).

1 finding from 1 review