Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,954 questions · 2,335 findings · 149 reviews · Oral Health

No studies found 436 · 18.7%GRADE not reported 1,370 · 58.7%Very low 254 · 10.9%Low 173 · 7.4%Moderate 80 · 3.4%High 22 · 0.9%

Lower lip bumper vs No active treatment (control)

Size of the lower jaw (arch length) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth

Lower lip bumper led to higher size of the lower jaw (mandibular arch length) at 6 months compared with no active treatment (control); GRADE not reported.

1 finding from 1 review

Intervention not reported

Dental caries prevalence · General population in Ethiopia (all ages, age range 6-100 years)

Caries prevalence in the Amhara region was 40.44% (95% CI 24.67 to 56.21); certainty not graded.

1 finding from 1 review

ARP with xenograft (bone graft) vs Extraction alone

Aesthetic outcomes of future prosthodontic rehabilitation · Adults aged 18 years or older, in good general health (including well-controlled systemic disease), requiring extraction of one or more…

The review found no eligible studies for this question.

1 finding from 1 review

ARP with xenograft (bone graft) vs Extraction alone

Changes in vertical height of alveolar ridge (mm) · Adults aged 18 years or older, in good general health (including well-controlled systemic disease), requiring extraction of one or more…

It is very uncertain whether ARP with xenograft (bone graft) changes changes in vertical height of alveolar ridge (mm) compared with extraction alone (very low certainty).

1 finding from 1 review

ARP with demineralised bone matrix, single particle size vs ARP with demineralised bone matrix, multiple particle size

Changes in vertical height of alveolar ridge (mm) · Adults aged 18 years or older, in good general health (including well-controlled systemic disease), requiring extraction of one or more…

It is very uncertain whether ARP with demineralised bone matrix, single particle size changes changes in vertical height of alveolar ridge (mm) compared with ARP with demineralised bone matrix, multiple particle size (very low certainty).

1 finding from 1 review

Fixed tooth-borne expansion (Hyrax) vs Bonded expander plate (acrylic)

Molar expansion · Children and adults with a posterior crossbite, without a Class III skeletal relationship, cleft lip or palate (or both), or other…

Fixed tooth-borne Hyrax expander showed no clear difference in molar expansion compared with bonded expander plate (acrylic); GRADE not reported.

1 finding from 1 review

Fixed bonded acrylic splint expander vs no treatment

Molar expansion · Children and adults with a posterior crossbite, without a Class III skeletal relationship, cleft lip or palate (or both), or other…

Fixed bonded acrylic splint expander showed no clear difference in molar expansion (maxillary intermolar width) compared with no treatment; GRADE not reported.

1 finding from 1 review

Glass ionomer cement (for bracket bonding) vs Resin adhesive

Initiation of white spot lesions (WSL), visual-tactile assessment · Patients of any age (11-40 years) receiving comprehensive/fixed orthodontic treatment with fixed appliances

There is no clear difference in WSL initiation between glass ionomer cement and resin adhesive for bracket bonding (RR 0.72, not significant); certainty of evidence is very low.

1 finding from 1 review

Nickel-titanium archwire vs Multistranded stainless steel archwire

Harms (pain) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
1 finding from 1 review
  • Orthodontic treatment for crowded teeth in children 2021 · Cochrane All outcomes
    first days
    No difference in overall pain, but more pain with nickel-titanium at 12 hours and day 1 (morning, afternoon, bedtime) vs multistranded stainless steel (Sandhu 2013). Narrative; no pooled estimate.
    1 study
    GRADE not reported

Intervention not reported

Dental caries prevalence · General population in Ethiopia (all ages, age range 6-100 years)

Caries prevalence in other regions (Oromia, Harar, SNNPR) was 42.90% (95% CI 24.68 to 61.12); certainty not graded.

1 finding from 1 review

Copper nickel-titanium archwire vs Nickel-titanium archwire

Amount of crowding · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth

It is very uncertain whether copper nickel-titanium archwire changes amount of crowding (Little's Irregularity Index) at 12 weeks compared with nickel-titanium archwire (very low certainty).

1 finding from 1 review

Quad-helix plus multi-bracket appliance vs Expansion arch plus multi-bracket appliance

Canine expansion · Children and adults with a posterior crossbite, without a Class III skeletal relationship, cleft lip or palate (or both), or other…

Quad-helix plus multi-bracket appliance showed no clear difference in canine expansion compared with expansion arch plus multi-bracket appliance; GRADE not reported.

1 finding from 1 review

Cesarean section delivery vs Vaginal delivery

Caries prevalence (early childhood caries) · Toddlers and preschool children, 2 to 6 years of age (primary dentition)

Caesarean section delivery may be associated with a modestly higher prevalence of early childhood caries than vaginal delivery (pooled OR 1.48), but the evidence is inconsistent and of very low certainty.

1 finding from 1 review