Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

8 questions · 9 findings · 4 reviews · Dental caries

No studies found 0 · 0%GRADE not reported 2 · 22.2%Very low 3 · 33.3%Low 2 · 22.2%Moderate 2 · 22.2%High 0 · 0%

Higher total dose radiotherapy (76.8 Gy over 6.4 weeks) vs conventional dose RT

Total mortality · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

Higher total dose radiotherapy (76.8 Gy over 6.4 weeks) showed no clear difference in total mortality compared with conventional/standard total dose radiotherapy (72 Gy); GRADE not reported.

1 finding from 1 review

Higher total dose radiotherapy (76.8 Gy over 6.4 weeks) vs conventional dose RT

Locoregional control · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

Higher total dose radiotherapy (76.8 Gy over 6.4 weeks) showed no clear difference in locoregional control compared with conventional/standard total dose radiotherapy (72 Gy); GRADE not reported.

1 finding from 1 review

Higher drinking-water fluoride exposure vs Lower water fluoride concentration (concurrent control)

Dental fluorosis of aesthetic concern (Dean's Index, TFI, TSIF) · Populations of all ages (mostly children) exposed to drinking water with differing fluoride concentrations

Higher water fluoride concentration (fluoridated water; natural or… may leads to higher dental fluorosis of aesthetic concern (Dean's Index, TFI, TSIF) compared with lower water fluoride concentration (concurrent control) (low certainty).

1 finding from 1 review

Higher drinking-water fluoride exposure vs Lower water fluoride concentration (concurrent control)

Adverse effects: dental fluorosis · Populations of all ages (mostly children) exposed to drinking water with differing fluoride concentrations

Higher water fluoride concentration (fluoridated water; natural or… may leads to higher dental fluorosis of any level (all severities) compared with lower water fluoride concentration (concurrent control) (low certainty).

1 finding from 1 review

Chlorhexidine varnish (10% and 40%) vs placebo or no treatment

Caries increment in permanent teeth · 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% and 40%) changes caries increment in permanent dentition (DMFS; higher values… compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Fluoride toothpaste less than 1000 ppm (lower concentration) vs Fluoride toothpaste 1000 ppm or more (higher concentration)

Fluorosis (percentage prevalence in permanent teeth) · Children exposed to topical fluoride when under 6 years old; fluorosis assessed in permanent teeth at 6 to 18 years

It is very uncertain whether fluoride toothpaste less than 1000 ppm (lower concentration) changes fluorosis (percentage prevalence in permanent teeth) compared with fluoride toothpaste 1000 ppm or more (higher concentration) (very low certainty).

2 findings from 1 review

Fluoride toothpaste 440 ppm (lower concentration) vs 1450 to 1500 ppm F toothpaste

Fluorosis (percentage prevalence in permanent teeth) · Children exposed to topical fluoride when under 6 years old; fluorosis assessed in permanent teeth at 6 to 18 years

Fluoride toothpaste 440 ppm (lower concentration) probably leads to lower fluorosis (percentage prevalence in permanent teeth) compared with fluoride toothpaste 1450 ppm (higher concentration) (moderate certainty).

1 finding from 1 review

Fluoride toothpaste 550 ppm (lower concentration) vs Fluoride toothpaste 1000 ppm or more (higher concentration)

Fluorosis (percentage prevalence in permanent teeth) · Children exposed to topical fluoride when under 6 years old; fluorosis assessed in permanent teeth at 6 to 18 years

Fluoride toothpaste 550 ppm (lower concentration) probably leads to lower fluorosis (percentage prevalence in permanent teeth) compared with fluoride toothpaste 1000 ppm (higher concentration) (moderate certainty).

1 finding from 1 review