Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,890 questions · 3,917 findings · 272 reviews · All outcomes

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%

Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs no intervention or control intervention (control)

Number of days unable to take medicine orally · All patients with cancer who are receiving treatment

The review found no eligible studies for this question.

1 finding from 1 review

Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs no intervention or control intervention (control)

Duration of interruptions to cancer treatment · All patients with cancer who are receiving treatment

It is very uncertain whether oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed… changes duration of interruptions to cancer treatment compared with control (no treatment or standard/usual oral care, e.g. saline rinse) (very low certainty).

1 finding from 1 review

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

Caries in deciduous teeth (change in dmft) · 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 lower caries in deciduous teeth (change in dmft) compared with low/non-fluoridated water (0.4 ppm fluoride or less) (low certainty).

1 finding from 1 review

Xylitol chewing gum vs No treatment or non-cariogenic control

Outcome not reported · Children and adults

The review found no eligible studies for this question.

1 finding from 1 review

Chlorhexidine chewing gum 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)

Caries increment in permanent teeth · Children aged about 12 to 16 years (Hardwick 1982), community setting

Initiation of water fluoridation (artificial or natural) led to lower caries in permanent teeth (change in DMFS) compared with low/non-fluoridated water (0.4 ppm fluoride or less); GRADE not reported.

1 finding from 1 review

Chlorhexidine varnish (10%) vs placebo or no treatment

Elevated mutans streptococci levels (>=4 with caries screen; high vs low) · Children and adolescents below 18 years at study start (included studies: children from birth to 15 years), with mixed, permanent or…

It is very uncertain whether chlorhexidine varnish (10%) changes elevated mutans streptococci levels (>=4 with caries screen; high vs… compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Chlorhexidine varnish vs placebo or no treatment

Dental caries: dmfs increment (primary teeth) · 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

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 (deciduous 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 (deciduous teeth) compared with low/non-fluoridated water (0.4 ppm fluoride or less) (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

Proportion of children not remaining caries-free · Children and adolescents aged 16 years or younger (permanent dentition)

Fluoride gel (topically applied; operator- or self-applied; any… showed no clear difference in proportion of children not remaining caries-free compared with placebo or no treatment; GRADE not reported.

1 finding from 1 review

Cryotherapy (ice chips) 30 minutes vs Cryotherapy (ice chips) 60 minutes

Oral mucositis (any severity) · Adults with solid cancers receiving fluorouracil (5FU) and leucovorin

It is very uncertain whether oral cryotherapy for 30 minutes changes oral mucositis (any severity) compared with oral cryotherapy for 60 minutes (very low certainty).

1 finding from 1 review

Primary school-based behavioural intervention (both oral hygiene and dietary components) vs No treatment (or delayed treatment)

Plaque · Children aged 4 to 12 years attending primary school

Primary school-based behavioural intervention (both oral hygiene and… showed no clear difference in plaque indices (permanent and deciduous teeth) compared with no intervention or delayed intervention (non-intervention control;… (low certainty).

1 finding from 1 review
  • SoF (Plaque indices, follow-up 3 to 15 months): 'All 3 RCTs showed a reduction in plaque in the intervention group compared to control group'; 827 participants (3 RCTs); GRADE low; comment 'Data not suitable for…
    3 studies · 827 participants
    Low

Fluoride varnish vs placebo or no treatment

Proportion of children developing new caries (deciduous) · Children and adolescents aged 16 years or less

Fluoride varnish showed no clear difference in proportion of children developing one or more new caries… compared with placebo or no treatment; GRADE not reported.

1 finding from 1 review

Visual screening (oral visual inspection) by trained health workers vs No screening

Oral cancer mortality (disease-specific) · Apparently healthy adults aged 35 years or older (general population), living in 13 clusters in rural areas of Trivandrum city, Kerala,…

Visual screening (oral visual inspection) by trained health workers showed no clear difference in oral cancer mortality (disease-specific) compared with no screening (low certainty).

2 findings from 1 review

Glass ionomer-based sealant vs Resin-based sealant

Caries occurrence on sealed teeth · Sealed permanent teeth

Glass-ionomer and resin-based fissure sealants showed no statistically significant difference in caries occurrence on sealed permanent teeth at 12 months (no GRADE rating).

3 findings from 1 review