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%

Removable tooth-borne expansion (expansion plate) vs observation

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

Removable tooth-borne expansion (expansion plate) leads to higher crossbite correction compared with observation (no treatment) (high certainty).

1 finding from 1 review

Fixed tooth-borne expansion (Hyrax) vs Fixed tooth-tissue-borne expansion (Haas)

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

Fixed tooth-borne expansion (Hyrax) showed no clear difference in crossbite correction compared with fixed tooth-tissue-borne expansion (Haas) (moderate certainty).

1 finding from 1 review

Two-band palatal expander with slow expansion vs Two-band palatal expander with rapid expansion

Molar expansion · Children and adults with a posterior crossbite, without a Class III skeletal relationship, cleft lip or palate (or both), or other…
1 finding from 1 review
  • Orthodontic treatment for posterior crossbites 2021 · Cochrane All outcomes
    7 months after start of treatment
    Martina 2012: slow 6.3 mm (SD 2.1) vs rapid 5.7 mm (SD 1.6); reported as no statistically significant difference in text (PUB2 MD 0.60, 95% CI -0.85 to 2.05); Table 1 lists P<0.001 (discrepant)
    1 study · 26 participants
    GRADE not reported

Lower lip bumper vs No active treatment (control)

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 lower lip bumper changes amount of crowding (change in mandibular incisor crowding) at 6 months compared with no active treatment (control) (very low certainty).

1 finding from 1 review

Fixed tooth-borne expansion (quad-helix) vs observation

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

Fixed tooth-borne expansion (quad-helix) leads to higher crossbite correction compared with observation (no treatment) (high certainty).

1 finding from 1 review

Fixed tooth-borne expansion (quad-helix) vs observation

Canine 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 expansion (quad-helix) may leads to higher canine expansion (inter-canine distance) compared with observation (no treatment) (low certainty).

1 finding from 1 review

Vibrational appliance with fixed appliances vs Fixed appliances

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 vibrational appliance with fixed appliances changes amount of crowding (change in mandibular crowding) at 10 to 30 weeks compared with fixed appliances only / no vibrational appliance (control) (very low certainty).

1 finding from 1 review

ARP with allograft (bone graft) vs ARP with xenograft

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 allograft changes changes in vertical height of alveolar ridge (mm) compared with ARP with xenograft (very low certainty).

1 finding from 1 review

Bone-borne expansion vs Fixed tooth-borne expansion (Hyrax)

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

Bone-borne expansion showed no clear difference in crossbite correction compared with fixed tooth-borne expansion (Hyrax) (low certainty).

1 finding from 1 review

Direct composite resin restoration vs Amalgam restoration

Secondary caries · People with permanent or adult posterior teeth requiring restoration (parallel-group trials involved children aged 6 to 12 years)

Direct composite resin restoration showed no clear difference in secondary caries compared with amalgam restoration; GRADE not reported.

3 findings from 1 review

Intervention not reported

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

Caries prevalence was lowest in Addis Ababa at 34.20% (95% CI 8.42 to 59.97); certainty not graded.

1 finding from 1 review

Lower lip bumper vs No active treatment (control)

Lower incisors to mandible (position, mm) at 9 months · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth

Lower lip bumper led to higher lower incisors to mandible at 6 months compared with no active treatment (control); GRADE not reported.

1 finding from 1 review

Nickel-titanium archwire vs Stainless steel archwire

Amount of crowding (change in mandibular crowding) at 8 weeks · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth

It is very uncertain whether nickel-titanium archwire changes amount of crowding (change in mandibular crowding) at 8 weeks compared with stainless steel archwire (very low certainty).

1 finding from 1 review

Cervical pull headgear vs Minor interceptive procedures (control)

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

Cervical pull headgear led to higher size of the jaws (maxillary and mandibular arch length) compared with minor interceptive procedures (control); GRADE not reported.

1 finding from 1 review