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%

NSAIDs (ketorolac oral rinse; systemic celecoxib) vs placebo or no treatment

Improvement of histological features (not improved) · People with a diagnosis of oral leukoplakia

The review found no eligible studies for this question.

1 finding from 1 review

Low‐level laser therapy vs Placebo (or no irradiation)

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · Adolescents and adults undergoing orthodontic treatment

Low‐level laser therapy (LLLT) showed no clear difference in patient‐reported pain intensity or pain relief (VAS, NRS or… compared with placebo (or no irradiation); GRADE not reported.

5 findings from 1 review
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Antidepressants (trazodone 200 mg/day) vs placebo

Adverse event: tremor · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether antidepressants (trazodone 200 mg/day) changes adverse effects: tremor compared with placebo (very low certainty).

1 finding from 1 review

Experimental chewing adjuncts (bite wafers or chewing gum) vs No chewing gum, placebo, or control (no adjunct)

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · Adolescents/teenagers undergoing orthodontic treatment

Experimental chewing adjuncts (bite wafers or chewing gum) showed no clear difference in patient‐reported pain intensity or pain relief (VAS, NRS or… compared with no chewing gum, placebo, or control (no adjunct); GRADE not reported.

5 findings from 1 review
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Benzodiazepines (systemic clonazepam 0.5 mg/day) vs placebo

Relief of burning/discomfort (symptom relief; pain intensity) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether benzodiazepines (systemic clonazepam 0.5 mg/day) changes relief of burning/discomfort (symptom relief; pain intensity) compared with placebo (very low certainty).

1 finding from 1 review

Topical bleomycin vs placebo or no treatment

Safety of the intervention (adverse effects) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • Interventions for treating oral leukoplakia to prevent oral cancer 2016 · Cochrane All outcomes
    up to 3 months
    SoF 5, Safety of the intervention up to 3 months: 'All patients in the bleomycin group developed erythema with erosion by the end of the applications, whereas erythema developed in the placebo group. Discomfort was…
    1 study
    GRADE not reported

Preoperative antibiotics vs placebo

Occurrence of postoperative infection - 4 weeks · People requiring retreatment of periapical lesions (failed root canal therapy)

It is very uncertain whether preoperative antibiotic prophylaxis changes occurrence of postoperative infection - 4 weeks compared with placebo (very low certainty).

1 finding from 1 review

Topical treatments (benzydamine hydrochloride oral rinse) vs placebo

Adverse effects · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms
1 finding from 1 review
  • Interventions for treating burning mouth syndrome 2016 · Cochrane All outcomes
    short-term (up to 3 months) · benzydamine hydrochloride
    SoF9. Adverse effects: single study narratively reported that no adverse effects occurred from benzydamine hydrochloride oral rinse; 20 participants (1 RCT); very low.
    1 study · 20 participants
    Very low

Preoperative analgesics (analgesics given before dental treatment) vs Placebo or no analgesics

Anxiety · Children and adolescents aged up to 17 years having dental treatment (orthodontic treatment, fillings, pulp treatment, or tooth…

The review found no eligible studies for this question.

1 finding from 1 review

Dietary supplements (Catuama herbal compound) vs placebo

Adverse effects: exacerbation of symptoms · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether dietary supplements (Catuama herbal compound) changes adverse effects: exacerbation of symptoms compared with placebo (very low certainty).

1 finding from 1 review

Oral appliance or functional orthopaedic appliance vs placebo or no treatment

Daytime symptom: thirstiness in the morning (questionnaire) · Children with obstructive sleep apnoea (aged 15 years or younger)

Oral appliance or functional orthopaedic appliance showed no clear difference in daytime symptom: thirstiness in the morning (questionnaire) compared with placebo or no treatment; GRADE not reported.

1 finding from 1 review

Vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic acid, acitretin) vs placebo or no treatment

Clinical resolution (oral lesion not completely resolved) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • Interventions for treating oral leukoplakia to prevent oral cancer 2016 · Cochrane All outcomes
    4 to 12 months
    SoF 1, Clinical resolution (not completely resolved) at 4 to 12 months: 'Studies could not be combined in meta-analysis. One study evaluated topical treatment and did not find evidence of benefit; 3 studies of systemic…
    4 studies
    GRADE not reported

Oral appliance or functional orthopaedic appliance vs placebo or no treatment

Reduction of apnoea episodes (apnoea-hypopnoea index) · Children with obstructive sleep apnoea (aged 15 years or younger)

It is very uncertain whether oral appliance or functional orthopaedic appliance changes reduction of apnoea episodes (apnoea-hypopnoea index) compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Perioperative infraorbital nerve block vs Placebo (sham/placebo device)

Analgesia durationTime duration from the end of surgery to the time of first analgesic consumption. Scale from: 0 to 100. · Children up to 13 years of age, undergoing cleft lip repair surgery
1 finding from 1 review

Dietary supplements (Catuama herbal compound) vs placebo

Somnolence · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether dietary supplements (Catuama herbal compound) changes adverse effects: drowsiness compared with placebo (very low certainty).

1 finding from 1 review

Vibratory stimulation (vibratory adjuncts) vs No vibration or placebo vibration

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · Adolescents and adults undergoing orthodontic treatment

Vibratory stimulation (vibratory adjuncts) showed no clear difference in patient‐reported pain intensity or pain relief (VAS, NRS or… compared with no vibration or placebo vibration; GRADE not reported.

5 findings from 1 review
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