Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,692 questions · 2,586 findings · 180 reviews · Dental caries

No studies found 194 · 7.5%GRADE not reported 1,937 · 74.9%Very low 248 · 9.6%Low 136 · 5.3%Moderate 52 · 2%High 19 · 0.7%

Fluoride gel (topically applied; operator- or self-applied; any fluoride agent/concentration; frequency at least once a year) vs placebo or no treatment

Unacceptability of treatment (dropouts/exclusions during the trial) · Children and adolescents aged 16 years or less

Fluoride gel (topically applied; operator- or self-applied; any… showed no clear difference in unacceptability of treatment (dropouts/exclusions during the trial) compared with placebo or no treatment; GRADE not reported.

3 findings from 1 review

Xylitol syrup (high dose, 8 g/day) vs Control (low-dose xylitol, 2.67 g/day) syrup

Adverse effects (loose stools, diarrhoea) · Infants (primary teeth; baseline about 9 to 15 months)
1 finding from 1 review

Chlorhexidine varnish vs placebo or no treatment

Adverse events (e.g. ulcers, tooth staining) · Children and adolescents below 18 years at study start (included studies: children from birth to 15 years), with mixed, permanent or…
1 finding from 1 review

Fluoride gel (topically applied; operator- or self-applied; any fluoride agent/concentration; frequency at least once a year) vs placebo or no treatment

Mucosal irritation / oral soft tissue allergic reaction (signs of sensitivity) · Children and adolescents aged 16 years or less

The review found no eligible studies for this question.

1 finding from 1 review

Xylitol candy (7.5 g/day) vs Control (sorbitol) candy

Caries increment (dmfs, primary and permanent teeth combined) · Children (mixed dentition; baseline about 8 years)
1 finding from 1 review

Chlorhexidine mouthrinse vs Placebo or no intervention (including routine care)

Outcome not reported · Children and adolescents below 18 years at study start (included studies: children from birth to 15 years), with mixed, permanent or…

The review found no eligible studies for this question.

1 finding from 1 review

Initiation of water fluoridation (artificial or natural) vs Low/non-fluoridated water (0.4 ppm fluoride or less)

Disparities in caries across socioeconomic status (SES) · People of all ages in a community setting; the included caries studies were all in children aged 3 to 16 years
1 finding from 1 review
  • There is insufficient information to determine whether initiation of a water fluoridation programme results in a change in disparities in caries levels across SES. Data from 3 observational studies (participants not…
    3 studies · 35399 participants
    Low

Initiation of water fluoridation (artificial or natural) vs Low/non-fluoridated water (0.4 ppm fluoride or less)

Change in proportion of caries-free children (permanent teeth) · People of all ages in a community setting; the included caries studies were all in children aged 3 to 16 years

Initiation of water fluoridation (artificial or natural) may leads to higher change in proportion of caries-free children (permanent teeth) compared with low/non-fluoridated water (0.4 ppm fluoride or less) (low certainty).

1 finding from 1 review

Chlorhexidine gel (0.12%) vs no treatment

Pain, quality of life, patient satisfaction or costs · Children and adolescents below 18 years at study start (included studies: children from birth to 15 years), with mixed, permanent or…

The review found no eligible studies for this question.

1 finding from 1 review

Xylitol lozenges (5 g/day) vs placebo control

Adverse effects (sores in the mouth, cramps, bloating, constipation, flatulence, loose stool or diarrhoea) · adults
1 finding from 1 review

Xylitol tablets (200 to 600 mg/day) via slow-release pacifier/dummy vs Control (sorbitol) tablets

Number of infants with a caries increment (dmfs) · Infants (primary teeth)

It is very uncertain whether xylitol tablets (200 to 600 mg/day) via slow-release pacifier/dummy changes number of infants with a caries increment (dmfs) compared with control (sorbitol) tablets (very low certainty).

1 finding from 1 review

Fluoride gel (topically applied; operator- or self-applied; any fluoride agent/concentration; frequency at least once a year) vs placebo or no treatment

Staining · Children and adolescents aged 16 years or less

The review found no eligible studies for this question.

1 finding from 1 review