Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

357 questions · 363 findings · 46 reviews

No studies found 99 · 27.3%GRADE not reported 88 · 24.2%Very low 74 · 20.4%Low 55 · 15.2%Moderate 40 · 11%High 7 · 1.9%

Zinc vs placebo

Pulmonary exacerbations number of participants requiring IV antibiotics · children with cystic fibrosis

Summary of findings: Zinc supplementation showed no clear difference in pulmonary exacerbations number of participants requiring IV… compared with placebo (moderate certainty).

1 finding from 1 review

Zinc vs placebo

Adverse events number of participants hospitalised during the trial · children with cystic fibrosis

Summary of findings: Zinc supplementation showed no clear difference in adverse events number of participants hospitalised during the trial compared with placebo (moderate certainty).

1 finding from 1 review

Zinc vs placebo

Need for antibiotics days of antibiotic use · children with cystic fibrosis

It is very uncertain whether summary of findings: Zinc supplementation changes need for antibiotics number of days on IV or oral antibiotics compared with placebo (very low certainty).

1 finding from 1 review

Zinc chloride + sodium fluoride dentifrice vs Sodium fluoride (control) toothpaste

Volatile sulphur compounds (VSC), gas chromatography · Adolescents and adults aged over 16 years with clinical or self-assessed halitosis of oral origin; excluding induced or physiological…
1 finding from 1 review
  • Interventions for managing halitosis 2019 · Cochrane All outcomes
    Payne 2011 (cross-over RCT) compared ZnCl + NaF dentifrice versus control NaF dentifrice; VSC by gas chromatography. The trial reported the adjusted mean VSC scores in a graph and hence we could not use the data in the…
    1 study
    GRADE not reported

Chlorine dioxide + zinc mouthwash vs placebo

Volatile sulphur compounds (VSC), halimeter · Adults over 18 years with a clinical or self-assessed diagnosis of halitosis, without significant comorbidity (e.g. diabetes) or…
1 finding from 1 review
  • Mouthrinses for the treatment of halitosis 2008 · Cochrane All outcomes
    4 weeks
    Borden 2002: mean change in halimeter-assessed VSC (ppb). Oxygene: -47.63 at 2 weeks (64.97% reduction), -53.28 at 4 weeks (72.67% reduction); Placebo: -39.86 at 2 weeks, -36.77 at 4 weeks (41.75%). No between-group…
    1 study
    GRADE not reported

Chlorine dioxide + zinc mouthwash vs placebo

Organoleptic assessment of halitosis (mean change from baseline) · Adults over 18 years with a clinical or self-assessed diagnosis of halitosis, without significant comorbidity (e.g. diabetes) or…
1 finding from 1 review
  • Mouthrinses for the treatment of halitosis 2008 · Cochrane All outcomes
    4 weeks
    Borden 2002: mean change in organoleptic score (scale 0 to 5). Oxygene (chlorine dioxide + zinc): 0 at 2 weeks, 0.06 at 4 weeks; Placebo: 0.23 at 2 weeks, 0.16 at 4 weeks. Oxygene did not appear to reduce organoleptic…
    1 study
    GRADE not reported

Glutaraldehyde + zinc oxide and eugenol (ZOE) vs Full strength formocresol (FC)

Clinical failure · Children with extensive decay involving the dental pulp in primary teeth

Glutaraldehyde + zinc oxide and eugenol (ZOE) showed no clear difference in clinical failure compared with full strength formocresol (FC); GRADE not reported.

1 finding from 1 review

Glutaraldehyde + zinc oxide and eugenol (ZOE) vs Full strength formocresol (FC)

Radiological failure · Children with extensive decay involving the dental pulp in primary teeth

Glutaraldehyde + zinc oxide and eugenol (ZOE) showed no clear difference in radiological failure compared with full strength formocresol (FC); GRADE not reported.

1 finding from 1 review

Ferric sulphate (FS)/zinc oxide and eugenol (ZOE) pulpotomy vs Sedanol (ZOE) pulpectomy

Radiological failure · Children with extensive decay involving the dental pulp in primary teeth

Ferric sulphate (FS)/zinc oxide and eugenol (ZOE) pulpotomy showed no clear difference in radiological failure compared with sedanol (ZOE) pulpectomy; GRADE not reported.

1 finding from 1 review

220 mg zinc sulphate supplement containing 50 mg elemental zinc vs placebo

Ulcer healing · people with diabetes and foot ulcers

It is very uncertain whether 220 mg zinc sulphate supplement containing 50 mg elemental zinc changes ulcer healing (absolute change in individual parameters of ulcer… compared with placebo (very low certainty).

4 findings from 1 review
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