Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

582 questions · 642 findings · 67 reviews · All outcomes

No studies found 173 · 26.9%GRADE not reported 298 · 46.4%Very low 121 · 18.8%Low 35 · 5.5%Moderate 15 · 2.3%High 0 · 0%

Grape seed extract (GSE) and its proanthocyanidin fractions vs Untreated or vehicle control (some studies vs positive antimicrobial controls, e.g. chlorhexidine/fluoride)

Bacterial adhesion (inhibition) · Streptococcus mutans (in vitro cultures and biofilms)

Grape seed extract inhibits S. mutans adhesion to hydroxyapatite in vitro (2 studies; ungraded).

1 finding from 1 review

Cranberry extract or cranberry flavonoid fractions vs No extract or vehicle control; other antimicrobial agents

Bacterial adhesion or initial colonization · Streptococcus mutans (in vitro cultures and biofilms)

No meta-analysis was conducted; three included studies reported reduced adhesion or initial colonization with cranberry extract or fractions.

1 finding from 1 review

Cranberry extract / juice and proanthocyanidin (flavonoid) fractions vs Untreated or vehicle control (some studies vs positive antimicrobial controls, e.g. chlorhexidine/fluoride)

Bacterial adhesion (inhibition) · Streptococcus mutans (in vitro cultures and biofilms)

Cranberry extract inhibits S. mutans adhesion / initial colonization in vitro (3 studies; ungraded).

1 finding from 1 review

Grape seed extract or grape seed flavonoid fractions vs No extract or vehicle control; other antimicrobial agents

Bacterial adhesion · Streptococcus mutans (in vitro cultures and biofilms)

No meta-analysis was conducted; two included studies reported reduced Streptococcus mutans adhesion with grape seed extract or fractions.

1 finding from 1 review

Malocclusion vs No malocclusion

Impaired OHRQoL measured with CPQ 11-14 (quantitative synthesis / meta-analysis) · Adolescents (10-19 years)

Malocclusion (DAI) probably increases the prevalence of impaired OHRQoL (CPQ 11-14) by about 15% in adolescents (RR/PR 1.15, 95% CI 1.12-1.18; moderate certainty).

1 finding from 1 review

Gum chewing (sugar-free) vs No chewing gum

Salivary flow rate · Elderly (>60 years) and medically compromised adults with xerostomia / dry mouth

Across 19 studies the effect of gum chewing on stimulated and/or unstimulated salivary flow rate was mixed (9 positive, 10 no effect); this broad outcome was not meta-analyzed.

1 finding from 1 review

Hawley removable retainer vs Clear plastic removable retainer

Survival of retainers (failure/how many failed) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether hawley removable retainer changes survival of retainers (failure, upper and lower arches) compared with clear plastic removable retainer (very low certainty).

1 finding from 1 review

Hawley removable retainer vs Clear plastic removable retainer

Patient satisfaction: comfort (VAS, upper and lower arches) · People who had received fixed appliance orthodontic treatment

The review found no eligible studies for this question.

1 finding from 1 review

Malocclusion vs No malocclusion

Poor oral health-related quality of life (OHRQoL) · Adolescents (10-19 years)

Malocclusions probably have a negative effect on OHRQoL in adolescents, after adjustment for confounders (moderate certainty).

1 finding from 1 review

Laminar air flow with HEPA filter vs Without laminar flow or filter

Reduction in level of contamination in aerosols (CFU per cubic feet/min/patient) using Reyniers slit sampler 30 inches (76 cm) from floor · People undergoing aerosol-generating procedures (AGPs) in a dental setting

It is very uncertain whether laminar air flow with HEPA filter changes reduction in level of contamination in aerosols (CFU per cubic… compared with without laminar flow or filter (very low certainty).

1 finding from 1 review

Rubber dam + HVE vs Cotton roll + HVE

Reduction in level of contamination in aerosols (CFU) during restorative procedures at participant's chest · People undergoing aerosol-generating procedures (AGPs) in a dental setting

It is very uncertain whether rubber dam + HVE changes reduction in level of contamination in aerosols (CFU) during… compared with cotton roll + HVE (very low certainty).

1 finding from 1 review

Laser (Er:YAG, Er,Cr:YSGG, or Nd:YAG) vs Conventional mechanical caries removal (standard drill; handpiece with a bur)

Need for anaesthesia · Children, adolescents and adults with caries in deciduous and permanent teeth (age 3.5 to 84 years)

Laser (Er:YAG, Er,Cr:YSGG, or Nd:YAG) led to lower need for anaesthesia compared with conventional mechanical caries removal (standard drill; handpiece…; GRADE not reported.

2 findings from 1 review

Low‐level laser therapy vs Placebo (sham) laser therapy

Patient-reported altered sensation (spontaneous or evoked: anaesthesia/paraesthesia/dysaesthesia/hyperalgesia/allodynia) · Patients of any age in any setting requiring intervention for iatrogenic injury to the inferior alveolar or lingual nerve

It is very uncertain whether low-level laser therapy (photon-plus GaAlAs diode laser; 70 mW… changes patient-reported altered sensation (spontaneous or evoked:… compared with placebo (sham) laser therapy (very low certainty).

2 findings from 1 review

Resorbable barrier (membrane) to seal the lateral window vs No membrane to seal the lateral window

Prosthesis failure · Patients undergoing lateral-window maxillary sinus lift

Resorbable barrier (membrane) to seal the lateral window showed no clear difference in prosthesis failure compared with no membrane to seal the lateral window; GRADE not reported.

1 finding from 1 review

One-stage crestal-approach sinus lift with autogenous bone and 8 mm implants vs Lateral-window sinus lift with 50% autogenous bone/50% Bio-Oss and implants at least 10 mm long

Prosthesis failure · Patients with 3 to 6 mm of residual bone height at the sinus floor

One-stage crestal-approach sinus lift with autogenous bone and 8 mm… showed no clear difference in prosthesis failure compared with lateral-window sinus lift with 50% autogenous bone/50% Bio-Oss and…; GRADE not reported.

1 finding from 1 review

Sinus lift with bone graft (granular Bio-Oss) vs Sinus lift without bone graft (Inion resorbable rigid barrier maintaining space / no bone)

Prosthesis failure · Patients with an atrophic maxillary sinus requiring augmentation (1 to 5 mm residual bone height)

Sinus lift with bone graft (granular Bio-Oss) showed no clear difference in prosthesis failure compared with sinus lift without bone graft (Inion resorbable rigid barrier…; GRADE not reported.

1 finding from 1 review

One-stage lateral sinus lift with monocortical autogenous bone blocks (iliac crest) vs Two-stage lateral sinus lift with autogenous particulate bone (iliac crest)

Prosthesis failure · Patients with 2 to 7 mm of residual alveolar bone height in the edentulous maxillary sinus floor

One-stage lateral sinus lift with monocortical autogenous bone… showed no clear difference in prosthesis failure compared with two-stage lateral sinus lift with autogenous particulate bone (iliac…; GRADE not reported.

1 finding from 1 review