Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,695 questions · 4,979 findings · 433 reviews

No studies found 998 · 20%GRADE not reported 1,140 · 22.9%Very low 1,024 · 20.6%Low 1,029 · 20.7%Moderate 636 · 12.8%High 152 · 3.1%

Tempered chlorhexidine vs Non-tempered chlorhexidine

Reduction in level of contamination by particles >5 um (droplets) at <2 m from patient's oral cavity · Dental patients undergoing aerosol-generating procedures (AGPs) and the dental healthcare providers treating them

It is very uncertain whether tempered chlorhexidine changes reduction in level of contamination by particles >5 um (droplets) at… compared with non-tempered chlorhexidine (very low certainty).

3 findings from 1 review

Chlorhexidine vs No rinsing

Reduction in level of contamination by particles >5 um (droplets) at <2 m from patient's oral cavity · Dental patients undergoing aerosol-generating procedures (AGPs) and the dental healthcare providers treating them
1 finding from 1 review

Intervention not reported

Temperature ‐ cohort studies orally · children 9 months to 15 years old

It is very uncertain whether the intervention changes temperature ‐ cohort studies orally (very low certainty).

1 finding from 1 review

Antibiotics vs no treatment or placebo on top of topical antibiotics

Resolution of ear discharge ‐ measured after 4 weeks · people with CSOM; one study included patients of unknown age; one study included children with CSOM who had not responded to initial…

It is very uncertain whether systemic antibiotics changes resolution of ear discharge ‐ measured after 4 weeks (6 weeks) (Oral… compared with no treatment or placebo on top of topical antibiotics (very low certainty).

1 finding from 1 review

Any antimicrobial mouthwash and/or nasal spray (alone or in combination), at any concentration, delivered to the patient or HCW before and/or after an AGP vs No treatment or saline or water

Changes in microbiome in oral cavity, nasal cavity, oro- or nasopharynx · Patients without suspected or confirmed COVID-19 infection undergoing aerosol-generating procedures (AGPs), and the healthcare workers…

The review found no eligible studies for this question.

1 finding from 1 review

Any antimicrobial mouthwash and/or nasal spray (alone or in combination), at any concentration, delivered to the patient or HCW before and/or after an AGP vs No treatment or saline or water

Other adverse events (allergy, irritation/burning of nasal, oral or oropharyngeal mucosa, long-term staining of mucous membranes or teeth, accidental ingestion) · Patients without suspected or confirmed COVID-19 infection undergoing aerosol-generating procedures (AGPs), and the healthcare workers…

The review found no eligible studies for this question.

1 finding from 1 review

Antimicrobial mouthwash and/or nasal spray (alone or in combination), any concentration, frequency or dosage vs No treatment or saline or water

Other adverse events (allergy, irritation/burning of nasal, oral or oropharyngeal mucosa, long-term staining of mucous membranes or teeth, accidental ingestion) · Patients with suspected or confirmed COVID-19 infection

The review found no eligible studies for this question.

1 finding from 1 review

Any antimicrobial mouthwash and/or nasal spray (alone or in combination), at any concentration, delivered to healthcare workers, with or without the same intervention given to the patients with COVID-19 vs No treatment or saline or water

Changes in microbiome in oral cavity, nasal cavity, oro- or nasopharynx · Healthcare workers (HCWs) treating patients with suspected or confirmed COVID-19 infection

The review found no eligible studies for this question.

1 finding from 1 review

High-volume evacuation (HVE) vs No HVE

Reduction in level of contamination in aerosols (CFU) at more than 1 foot from oral cavity (CCT) · People undergoing aerosol-generating procedures (AGPs) in a dental setting

High-volume evacuation (HVE) led to lower reduction in level of contamination in aerosols (CFU) at more than 1… compared with no HVE; GRADE not reported.

1 finding from 1 review

High-volume evacuation (HVE) vs No HVE

Reduction in level of contamination in aerosols (CFU) at less than 1 foot from oral cavity (CCTs) · People undergoing aerosol-generating procedures (AGPs) in a dental setting

High-volume evacuation (HVE) showed no clear difference in reduction in level of contamination in aerosols (CFU) at less than 1… compared with no HVE; GRADE not reported.

1 finding from 1 review

High-volume evacuation (HVE) vs No HVE

Reduction in level of contamination in aerosols (CFU) during ultrasonic scaling and air polishing at more than 1 foot from oral cavity (RCT) · People undergoing aerosol-generating procedures (AGPs) in a dental setting

It is very uncertain whether high-volume evacuation (HVE) changes reduction in level of contamination in aerosols (CFU) during… compared with no HVE (very low certainty).

1 finding from 1 review