Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

47 questions · 54 findings · 7 reviews · All outcomes

No studies found 0 · 0%GRADE not reported 41 · 75.9%Very low 11 · 20.4%Low 2 · 3.7%Moderate 0 · 0%High 0 · 0%

Chlorhexidine 0.2% vs Pre-treatment (baseline, same group)

Plaque · Medically healthy individuals (adults and children, 6-60 years)

0.2% chlorhexidine rinse reduced plaque relative to baseline; not GRADE-rated.

1 finding from 1 review

Chlorhexidine 0.12% mouthrinse vs Pre-treatment (baseline, same group)

Plaque · Medically healthy individuals (adults and children, 6-60 years)

0.12% chlorhexidine rinse reduced plaque relative to baseline; not GRADE-rated.

1 finding from 1 review

Chlorhexidine mouthwash vs placebo

Cariogenic bacteria (Mutans streptococci) · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)

Chlorhexidine mouthwash reduced Mutans streptococci versus placebo, but certainty is very low.

1 finding from 1 review

Chlorhexidine mouthwash vs Blank control

Cariogenic bacteria (Mutans streptococci) · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)

Chlorhexidine mouthwash reduced Mutans streptococci versus blank control, but certainty is very low.

1 finding from 1 review

Chlorhexidine mouthwash vs placebo

Plaque index (PI) / oral hygiene · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)

Chlorhexidine mouthwash reduced Plaque Index versus placebo, but certainty is very low.

1 finding from 1 review

1% chlorhexidine + 1% thymol varnish vs 38% SDF + potassium iodide solution (applied annually)

Arrest or reversal of noncavitated and cavitated root carious lesions · Adults (including institutionalized/older adults) with noncavitated and cavitated carious lesions on root surfaces (permanent teeth)

1% chlorhexidine + 1% thymol varnish may not differ from 38% SDF + potassium iodide solution (applied annually) for arrest or reversal of root carious lesions (RR 0.71, 95% CI 0.11 to 4.45; very low certainty).

1 finding from 1 review

1% chlorhexidine + 1% thymol varnish vs Fluoride varnish

Arrest or reversal of noncavitated and cavitated root carious lesions · Adults (including institutionalized/older adults) with noncavitated and cavitated carious lesions on root surfaces (permanent teeth)

1% chlorhexidine + 1% thymol varnish may not differ from 5% NaF varnish for arrest or reversal of root carious lesions (RR 0.57, 95% CI 0.04 to 8.69; very low certainty).

1 finding from 1 review

1% chlorhexidine + 1% thymol varnish vs no treatment

Arrest or reversal of noncavitated and cavitated root carious lesions · Adults (including institutionalized/older adults) with noncavitated and cavitated carious lesions on root surfaces (permanent teeth)

1% chlorhexidine + 1% thymol varnish may not differ from no treatment for arrest or reversal of root carious lesions (RR 1.67, 95% CI 0.44 to 6.31; very low certainty).

1 finding from 1 review

1% chlorhexidine + 1% thymol varnish vs 38% SDF solution (applied annually)

Arrest or reversal of noncavitated and cavitated root carious lesions · Adults (including institutionalized/older adults) with noncavitated and cavitated carious lesions on root surfaces (permanent teeth)

1% chlorhexidine + 1% thymol varnish may not differ from 38% SDF solution (applied annually) for arrest or reversal of root carious lesions (RR 0.88, 95% CI 0.14 to 5.6; very low certainty).

1 finding from 1 review

1% chlorhexidine + 1% thymol varnish vs 5,000-ppm F (1.1% NaF) toothpaste or gel

Arrest or reversal of noncavitated and cavitated root carious lesions · Adults (including institutionalized/older adults) with noncavitated and cavitated carious lesions on root surfaces (permanent teeth)

1% chlorhexidine + 1% thymol varnish may not differ from 5,000-ppm F (1.1% NaF) toothpaste or gel for arrest or reversal of root carious lesions (RR 0.64, 95% CI 0.15 to 2.7; very low certainty).

1 finding from 1 review

HVGIC with chlorhexidine cavity disinfectant vs HVGIC without cavity disinfectant

Restoration failure · Children with carious primary teeth

No comparative effect estimate was reported; cavity disinfectant did not affect success in the review narrative.

1 finding from 1 review

Chlorhexidine mouthwash vs Placebo mouthwash

Probing pocket depth (PPD/PD) · Orthodontic patients (any age) undergoing orthodontic treatment (mostly fixed appliances)

Chlorhexidine mouthwash may reduce pocket probing depth versus placebo in the short term (low certainty).

1 finding from 1 review

Chlorhexidine mouthwash vs Blank control

Plaque · Orthodontic patients (any age) undergoing orthodontic treatment (mostly fixed appliances)

Chlorhexidine mouthwash may reduce the Plaque Index versus blank control in the short term (WMD -0.70, 95% CI -1.12 to -0.27), but the evidence is very uncertain (very low certainty).

1 finding from 1 review

Chlorhexidine mouthwash vs Blank control

Gingival index (GI) · Orthodontic patients (any age) undergoing orthodontic treatment (mostly fixed appliances)

Chlorhexidine mouthwash may reduce the Gingival Index versus blank control in the short term (WMD -0.54, 95% CI -0.96 to -0.13), but with very high heterogeneity the evidence is very uncertain (very low certainty).

1 finding from 1 review

Chlorhexidine mouthwash vs Placebo mouthwash

Gingival index (GI) · Orthodontic patients (any age) undergoing orthodontic treatment (mostly fixed appliances)

Chlorhexidine mouthwash probably reduces the Gingival Index versus placebo in the short term (WMD -0.45, 95% CI -0.70 to -0.20; low certainty).

1 finding from 1 review

Chlorhexidine mouthwash vs Blank control

Total bacteria (colony count) · Orthodontic patients (any age) undergoing orthodontic treatment (mostly fixed appliances)

Chlorhexidine mouthwash may reduce total bacteria colony counts versus blank control in the short term, but the evidence is very uncertain (very low certainty).

1 finding from 1 review

Salvadora persica (miswak) mouthrinse vs Chlorhexidine mouthrinse

Plaque · Medically healthy individuals (adults and children, 6-60 years)

When usual mechanical plaque control continued, Salvadora persica and chlorhexidine did not differ significantly for plaque; not GRADE-rated.

8 findings from 1 review
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Salvadora persica (miswak) mouthrinse vs Chlorhexidine 0.2% mouthrinse

Plaque · Medically healthy individuals (adults and children, 6-60 years)

Salvadora persica was less effective than 0.2% chlorhexidine at reducing plaque (favours chlorhexidine); not GRADE-rated.

1 finding from 1 review

Fluoride mouthrinse (0.05-0.32% sodium fluoride or amine fluoride) added to daily fluoride toothpaste vs Control: fluoride toothpaste alone, placebo mouthrinse + toothpaste, or non-fluoride (chlorhexidine) mouthrinse + toothpaste

Incidence of initial caries around brackets, aesthetic-zone teeth only · Orthodontic patients (any age) undergoing orthodontic treatment (mostly fixed appliances)

When only aesthetic-zone teeth (incisors and canines) were considered, two studies reported a significant reduction in initial caries incidence favoring fluoride mouthrinse (ungraded, narrative; no pooled estimate).

1 finding from 1 review