Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

9 questions · 9 findings · 3 reviews · Oral medicine and oral cancer

No studies found 0 · 0%GRADE not reported 5 · 55.6%Very low 3 · 33.3%Low 0 · 0%Moderate 1 · 11.1%High 0 · 0%

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

Malignant transformation (oral cancer development) · People with a diagnosis of oral leukoplakia

It is very uncertain whether vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic… changes oral cancer development compared with placebo or no treatment (very low certainty).

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

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

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

Vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic… probably leads to lower improvement of histological features (not improved) compared with placebo or no treatment (moderate certainty).

1 finding from 1 review

Vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic acid, acitretin) 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
    4 to 12 months
    SoF 1, Safety of the intervention at 4 to 12 months: '3 studies (1 each evaluating topical acitretin, topical 13-cis-retinoic acid, 200,000 IU per week of vitamin A) found no adverse effects. Systemic 13-cis-retinoic…
    4 studies
    GRADE not reported

Dietary supplements (alpha lipoic acid +/- vitamins) 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 dietary supplements (alpha lipoic acid +/- vitamins) changes relief of burning/discomfort (symptom relief; pain intensity) compared with placebo (very low certainty).

1 finding from 1 review

Dietary supplements (alpha lipoic acid +/- vitamins/lycopene/green tea; hypericum; Catuama; lycopene) 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
1 finding from 1 review
  • Interventions for treating burning mouth syndrome 2016 · Cochrane All outcomes
    short-term (up to 3 months)
    SoF5 Dietary supplements vs placebo. Symptom relief short-term: insufficient or contradictory evidence regarding benefit of any evaluated dietary supplement; 628 participants (12 RCTs); very low. Subgroups: ALA without…
    12 studies · 628 participants
    Very low