Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,320 questions · 4,561 findings · 388 reviews

No studies found 1,138 · 25%GRADE not reported 886 · 19.4%Very low 1,014 · 22.2%Low 849 · 18.6%Moderate 543 · 11.9%High 131 · 2.9%

ARP with alloplast vs ARP with xenograft

Changes in probing depth (PD) at teeth adjacent to the extraction site · Adults aged 18 years or older, in good general health (including well-controlled systemic disease), requiring extraction of one or more…

ARP with alloplast showed no clear difference in changes in probing depth (PD) at teeth adjacent to the extraction site compared with ARP with xenograft; GRADE not reported.

1 finding from 1 review

Direct composite resin restoration vs Amalgam restoration

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

Direct composite resin restoration may leads to higher restoration failure rate compared with amalgam restoration (low certainty).

3 findings from 1 review

ARP with allograft (bone graft) vs ARP with xenograft

Complications (e.g. discomfort, pain and swelling) · Adults aged 18 years or older, in good general health (including well-controlled systemic disease), requiring extraction of one or more…
1 finding from 1 review

Vibrational appliance with fixed appliances vs Fixed appliances

Harms (discomfort, pain intensity, analgesia use) · 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 week
    No clear difference in discomfort/pain intensity or analgesia consumption between vibrational appliance and control (Miles 2012, Miles 2016, Woodhouse 2015; 100 mm VAS). Narrative; no pooled estimate.
    2 studies
    GRADE not reported

Any orthodontic (non-surgical) treatment to correct posterior crossbite or expand the top teeth vs No treatment or another orthodontic treatment

Signs and symptoms of respiratory disease · Children and adults with a posterior crossbite, without a Class III skeletal relationship, cleft lip or palate (or both), or other…

The review found no eligible studies for this question.

1 finding from 1 review

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

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