Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,556 questions · 10,375 findings · 429 reviews · Oral Health

No studies found 1,344 · 13%GRADE not reported 6,832 · 65.9%Very low 1,228 · 11.8%Low 613 · 5.9%Moderate 290 · 2.8%High 68 · 0.7%

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Thermoelastic copper NiTi (CuNiTi) arch wire vs Conventional (stabilised) NiTi arch wire

Time to alignment · People receiving orthodontic treatment with fixed appliances (upper and/or lower full arch)

Thermoelastic copper NiTi (CuNiTi) arch wire showed no clear difference in time to alignment (alignment rate ratio) compared with conventional NiTi arch wire (low certainty).

1 finding from 1 review

Extraction at patient age <8 years vs Extraction at patient age >10 years

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, extraction before age 8 (vs after 10) increases odds of space closure (OR 5.01; low certainty).

1 finding from 1 review

Cranberry extract / juice and proanthocyanidin (flavonoid) fractions vs Untreated or vehicle control (some studies vs positive antimicrobial controls, e.g. chlorhexidine/fluoride)

GtfB/C and F-ATPase activity · Streptococcus mutans (in vitro cultures and biofilms)

Cranberry proanthocyanidins downregulate GtfB/C and F-ATPase activity of S. mutans (5 studies; ungraded).

1 finding from 1 review

Occlusal splint vs Behavioural therapy (counselling, CBT, relaxation, self-care management)

Range of mandibular motion · People with temporomandibular disorders (TMD)

Occlusal splint showed no clear difference in range of mandibular motion compared with behavioural therapy (counselling, CBT, relaxation, self-care…; GRADE not reported.

1 finding from 1 review

Silver diamine fluoride (SDF) vs placebo or no treatment

Adverse effects · Children and adults (with or without carious lesions)
2 findings from 1 review

Adjunctive antimicrobial photodynamic therapy (aPDT) applied after subgingival instrumentation (SI) vs Subgingival instrumentation (SI) alone (hand or power-driven, or both), or SI plus placebo/sham aPDT

Pocket closure · Adults (> 18 years) with recurrent periodontitis, receiving supportive (maintenance) periodontal care
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 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

CC+AA (homozygous) genotypes vs CA (heterozygous) genotype

Dental caries · Children (<18 years) with vs without dental caries

ApaI(rs7975232) over-dominant model: CC+AA vs CA was not significantly associated with dental caries (OR 0.91); ungraded.

1 finding from 1 review

Facemask vs no intervention

Adverse effects (temporomandibular joint signs and symptoms) · Children and adolescents (aged 16 years or younger) with prominent lower front teeth (Class III malocclusion)
1 finding from 1 review

Age 8-10 years vs Extraction at patient age >10 years

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, extraction at age 8-10 (vs after 10) increases odds of space closure (OR 3.32; low certainty).

1 finding from 1 review

Slum / urban-disadvantaged setting vs Non-slum urban setting

Oral disease prevalence · Adult residents of slums and non-slum urban settings of LMICs

Oral disease prevalence was generally high and worse in slum settings where compared, but no meta-analysis was conducted.

1 finding from 1 review

Cranberry extract or cranberry flavonoid fractions vs No extract or vehicle control; other antimicrobial agents

Bacterial growth inhibition · Streptococcus mutans (in vitro cultures and biofilms)

No meta-analysis was conducted; seven included studies reported inhibition of Streptococcus mutans growth with cranberry extract or fractions.

1 finding from 1 review

Higher waist circumference vs Lower waist circumference

Dental caries in children · Children (approx. 4-18 years)

Waist circumference was not significantly associated with childhood dental caries (pooled OR 1.08, 95% CI 0.90 to 1.30; I2=47.7%); ungraded.

1 finding from 1 review

Adjunctive antimicrobial photodynamic therapy (aPDT) applied after subgingival instrumentation (SI) vs Subgingival instrumentation (SI) alone (hand or power-driven, or both), or SI plus placebo/sham aPDT

Quality of life · Adults (> 18 years) with recurrent periodontitis, receiving supportive (maintenance) periodontal care

The review found no eligible studies for this question.

1 finding from 1 review