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Evidence found and GRADE certainty

127 questions · 127 findings · 52 reviews

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No studies found 65 · 51.2%GRADE not reported 26 · 20.5%Very low 20 · 15.7%Low 14 · 11%Moderate 2 · 1.6%High 0 · 0%

Vitamin C vs placebo

Adverse effects (urticaria) Defined as participants reporting urticaria (hives) Dose: 2 g per day · school‐aged children (6 to 15 years) and marine corps recruits (mean age 18.5 years)

It is very uncertain whether vitamin C changes adverse effects (urticaria) Defined as participants reporting… compared with placebo (very low certainty).

1 finding from 1 review

Occlusal adjustment as an adjunct to surgical periodontal therapy vs Surgical periodontal therapy alone (no occlusal adjustment)

Adverse effects (e.g. thermal sensitivity, over-eruption, TMJ symptoms, poor aesthetics, reduced oral hygiene) · Adults with chronic periodontitis

The review found no eligible studies for this question.

1 finding from 1 review

Occlusal adjustment as an adjunct to non-surgical periodontal therapy vs Non-surgical periodontal therapy alone (no occlusal adjustment)

Adverse effects (e.g. thermal sensitivity, over-eruption, TMJ symptoms, poor aesthetics, reduced oral hygiene) · Adults with chronic periodontitis

The review found no eligible studies for this question.

1 finding from 1 review

Provision of maize flour or maize flour products fortified with iron plus other vitamins and minerals vs unfortified maize flours or maize flour products

Any adverse effects (including constipation, nausea, vomiting, heartburn or diarrhoea, as measured by trialists) · general population older than 2 years of age (including pregnant women), in Kenya and Mexico

The review found no eligible studies for this question.

1 finding from 1 review

Loratadine 10 mg vs placebo (4‐week intervention)

Primary outcome 2. Proportion of participants reporting adverse effects and serious adverse events throughout the study period · adults with eczema

Loratadine 10 mg/d showed no clear difference in primary outcome 2. Proportion of participants reporting adverse… compared with placebo (4‐week intervention) (low certainty).

1 finding from 1 review

Fluoride varnish vs placebo or no treatment

Adverse effects / specific side effects (oral allergic reactions, mucosal irritation, adverse symptoms such as nausea, gagging, vomiting) · Children and adolescents aged 16 years or less
1 finding from 1 review

Resorbable (bioresorbable) plates or screws for fixation vs Titanium plates or screws for fixation

Adverse effects (insufficient fixation; re-operation/revision; plate exposure; superficial or deep wound infection; sinus tract; wound dehiscence; giant cell/foreign body or inflammatory reaction; post-traumatic dystrophy) · Adults over 18 years of age with fractures of the facial skeleton including the mandible, maxilla, zygoma (malar); studies on fractures of…

The review found no eligible studies for this question.

1 finding from 1 review
  • Resorbable versus titanium plates for facial fractures 2009 · Cochrane All outcomes
    Up to 3 years postoperatively
    Planned adverse-effects outcome not assessed: none of the retrieved studies met the inclusion criteria, so no data were available for analysis. Verbatim (Effects of interventions): "Although 53 studies were retrieved…
    0 studies
    No studies found