Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,348 questions · 1,514 findings · 111 reviews · All outcomes

No studies found 287 · 19%GRADE not reported 823 · 54.4%Very low 243 · 16.1%Low 104 · 6.9%Moderate 49 · 3.2%High 8 · 0.5%

Probiotics vs placebo or control

Gingival bleeding (various bleeding indices) · Children and/or adolescents (<18 years) without background systemic disease

Only one trial (Borrell 2021) reported the bleeding index, showing slightly more bleeding with probiotics (MD 0.10, 95%CI 0.02 to 0.18); not pooled or GRADE-rated.

1 finding from 1 review

Antioxidants (lycopene, curcumin, Oxitard) vs Placebo or no active treatment

Difficulty in swallowing (participant-reported proxy) · People of any age with a confirmed diagnosis, by clinical examination and biopsy, of oral submucous fibrosis (OSF)

Antioxidants (lycopene, curcumin, Oxitard) led to lower difficulty in swallowing (participant-reported proxy) compared with placebo or no active treatment; GRADE not reported.

1 finding from 1 review

Occlusal splint vs No treatment or placebo (non-occlusal or transparent-foil placebo splint)

Self-reported joint pain when chewing · People with temporomandibular disorders (TMD)

It is very uncertain whether occlusal splint changes self-reported joint pain when chewing compared with no treatment or placebo (non-occlusal or transparent-foil placebo… (very low certainty).

1 finding from 1 review

Prophylaxis (teeth cleaning) and CHX or iodine-NaF solution application in the dentition of women (mothers) vs placebo

Child microbiological presence (mutans streptococci acquisition) · For interventions, pregnant women and mothers of infants in the first year of life; for outcomes, children up to 6 years of age
1 finding from 1 review

Probiotics vs placebo or control

Plaque index (PI) / oral hygiene · Children and/or adolescents (<18 years) without background systemic disease

Probiotics may make little to no difference to the bacterial plaque index versus control (MD 0.21, 95%CI -0.55 to 0.96; very low certainty).

1 finding from 1 review

Silver diamine fluoride (SDF) vs placebo or no treatment

Aesthetics · Children and adults (with or without carious lesions)
1 finding from 1 review

Prophylaxis (teeth cleaning) and CHX or iodine-NaF solution application in the dentition of women (mothers) vs placebo

Mother caries (DMFT increment) · For interventions, pregnant women and mothers of infants in the first year of life; for outcomes, children up to 6 years of age

Prophylaxis (teeth cleaning) and CHX or iodine-NaF solution… showed no clear difference in mother caries (DMFT increment) compared with placebo; GRADE not reported.

1 finding from 1 review

Probiotics vs placebo or control

Streptococcus viridans count (CFU/mL) · Children and/or adolescents (<18 years) without background systemic disease

Only one trial (Mishra 2014) reported S. viridans count, showing a higher count with probiotics (MD 0.40 CFU/mL, 95%CI 0.33 to 0.47); not pooled or GRADE-rated.

1 finding from 1 review

Single preoperative dose of systemic antibiotics (clindamycin 600 mg), total chemo-mechanical debridement and root filling vs Matched placebo, total chemo-mechanical debridement and root filling

Adverse effects · Adults with symptomatic apical periodontitis (no signs of spreading infection or systemic involvement)
1 finding from 1 review

Postoperative systemic antibiotics (phenoxymethylpenicillin/penicillin VK, 7-day course), partial or total chemo-mechanical debridement and analgesics vs Matched placebo, partial or total chemo-mechanical debridement and analgesics

Number of paracetamol (acetaminophen) with codeine tablets required · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)

Postoperative systemic antibiotics… showed no clear difference in number of paracetamol (acetaminophen) with codeine tablets required compared with matched placebo, partial or total chemo-mechanical debridement and…; GRADE not reported.

1 finding from 1 review

Adjunctive antimicrobial photodynamic therapy (aPDT) applied after submucosal instrumentation (SI) vs Submucosal instrumentation (SI) alone, or SI plus placebo/sham aPDT

Attachment change · Adults (> 18 years) with peri-implant mucositis, receiving active treatment

The review found no eligible studies for this question.

1 finding from 1 review

Pentoxifylline vs Placebo or no active treatment

Burning sensation (VAS 0-100) · People of any age with a confirmed diagnosis, by clinical examination and biopsy, of oral submucous fibrosis (OSF)

It is very uncertain whether pentoxifylline changes burning sensation (VAS 0-100) compared with placebo or no active treatment (very low certainty).

1 finding from 1 review

Adjunctive antimicrobial photodynamic therapy (aPDT) applied after subgingival instrumentation (SI) vs Subgingival instrumentation (SI) alone (hand or power-driven, or both), or SI plus placebo/sham aPDT

Any adverse effect related to aPDT · Adults (> 18 years) with recurrent periodontitis, receiving supportive (maintenance) periodontal care
1 finding from 1 review

Single preoperative dose of systemic antibiotics (clindamycin 600 mg), total chemo-mechanical debridement and root filling vs Matched placebo, total chemo-mechanical debridement and root filling

Pain at 7 days · Adults with symptomatic apical periodontitis (no signs of spreading infection or systemic involvement)
1 finding from 1 review

Prophylaxis (teeth cleaning) and CHX or iodine-NaF solution application in the dentition of women (mothers) vs placebo

Mother caries (dmfs increment) · For interventions, pregnant women and mothers of infants in the first year of life; for outcomes, children up to 6 years of age

Prophylaxis (teeth cleaning) and CHX or iodine-NaF solution… showed no clear difference in mother caries (dmfs increment) compared with placebo; GRADE not reported.

1 finding from 1 review

Postoperative systemic antibiotics (phenoxymethylpenicillin/penicillin VK, 7-day course), partial or total chemo-mechanical debridement and analgesics vs Matched placebo, partial or total chemo-mechanical debridement and analgesics

Endodontic flare-up · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)

Postoperative systemic antibiotics… showed no clear difference in endodontic flare-up compared with matched placebo, partial or total chemo-mechanical debridement and…; GRADE not reported.

1 finding from 1 review

Low-power CO2 laser irradiation (LLLT, 0.5 to 2 W) vs Placebo (placebo laser or placebo agent) or no treatment

White spot lesion incidence · High caries-risk patients: fixed-orthodontic-appliance patients and children with partially erupted permanent molars

Low-power CO2 laser (LLLT) is associated with a lower incidence of new white spot lesions than placebo (OR 0.21, CI 0.15 to 0.30; ungraded, 3 RCTs, considerable heterogeneity I2=71%).

1 finding from 1 review

Adjunctive antimicrobial photodynamic therapy (aPDT) applied after submucosal instrumentation (SI) vs Submucosal instrumentation (SI) alone, or SI plus placebo/sham aPDT

Change in bleeding on probing (BOP) · Adults (> 18 years) with peri-implant mucositis, receiving active treatment

Adjunctive antimicrobial photodynamic therapy (aPDT) applied after… led to higher change in bleeding on probing (BOP) compared with submucosal instrumentation (SI) alone, or SI plus placebo/sham aPDT; GRADE not reported.

1 finding from 1 review