Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,227 questions · 2,562 findings · 156 reviews · Oral Health

No studies found 297 · 11.6%GRADE not reported 1,616 · 63.1%Very low 405 · 15.8%Low 144 · 5.6%Moderate 81 · 3.2%High 19 · 0.7%

Gastroesophageal or laryngopharyngeal reflux (GERD/LPR) vs Healthy controls

Oral/pharyngeal microbiota modifications · Adults with gastroesophageal reflux disease (GERD) or laryngopharyngeal reflux (LPR)

No eligible studies investigated reflux-related modifications of the oral or pharyngeal microbiota; this is an evidence gap identified by the review.

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

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

Other adverse events (allergy, irritation/burning of nasal, oral or oropharyngeal mucosa, long-term staining of mucous membranes or teeth, accidental ingestion) · 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) during ultrasonic scaling and air polishing at less than 1 foot (~30 cm) from oral cavity (RCTs) · 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

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

Changes in microbiome in oral cavity, nasal cavity, oro- or nasopharynx · Patients with suspected or confirmed COVID-19 infection

The review found no eligible studies for this question.

1 finding from 1 review

Surgically induced or chronic acid gastroesophageal reflux (experimental) vs Non-reflux control animals

Dental erosion, alveolar bone destruction and oral/pharyngeal lesions · Rat models with surgically induced or chronic acid gastroesophageal reflux

In experimental rat models, induced gastroesophageal reflux caused dental erosion, alveolar bone destruction and oral lesions compared with controls, supporting biological plausibility; evidence is ungraded animal research.

1 finding from 1 review

GERD/NERD vs Healthy individuals without reflux (controls)

Oral mucosa inflammation (gingivitis, periodontitis, mucosal lesions) · Adults with gastroesophageal reflux disease (GERD) or laryngopharyngeal reflux (LPR)

The association between reflux and oral mucosa inflammation (gingivitis/periodontitis) is inconsistent across five studies and remains ungraded.

1 finding from 1 review

Routine scale and polish every 6 months vs Routine scale and polish every 12 months

Oral health-related quality of life · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental practice)

Routine scale and polish every 6 months showed no clear difference in oral health-related quality of life (OHIP-14) compared with routine scale and polish every 12 months (high certainty).

1 finding from 1 review

Routine scale and polish at a fixed interval vs No scheduled scale and polish treatment

Participant satisfaction (perceived oral cleanliness) · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental practice)

Planned, regular routine scale and polish (6-monthly; 12-monthly… may leads to higher participant satisfaction (perceived oral cleanliness) compared with no scheduled scale and polish treatment (low certainty).

1 finding from 1 review

Routine scale and polish provided by a dentist vs Routine scale and polish provided by a dental care professional (dental therapist or hygienist)

Oral health-related quality of life · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental practice)

The review found no eligible studies for this question.

1 finding from 1 review

Biofunctional Prosthetic System (BPS): closed-mouth two stage-two step final impression with addition silicone elastomer vs Conventional complete denture technique (CCD): open-mouth two stage-two step conventional technique using elastomer

Oral health-related quality of life · Completely edentulous people
1 finding from 1 review

Autologous platelet concentrates (APC) + guided tissue regeneration (GTR) vs GTR (guided tissue regeneration) alone

Oral health-related quality of life · Patients affected by infrabony defects requiring surgical treatment, regardless of their age or gender

The review found no eligible studies for this question.

1 finding from 1 review

Autologous platelet concentrates (APC) + enamel matrix derivative (EMD) vs EMD (enamel matrix derivative) alone

Oral health-related quality of life · Patients affected by infrabony defects requiring surgical treatment, regardless of their age or gender

The review found no eligible studies for this question.

1 finding from 1 review