Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

166 questions · 194 findings · 13 reviews · Orthodontics

No studies found 81 · 41.8%GRADE not reported 62 · 32%Very low 35 · 18%Low 13 · 6.7%Moderate 3 · 1.5%High 0 · 0%

Double primary (canine and first molar) tooth extraction vs Single primary (canine) tooth extraction

Any other adverse effects of the interventions, such as gingival disease and demineralisation · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

The review found no eligible studies for this question.

1 finding from 1 review

Double primary (canine and first molar) tooth extraction vs Single primary (canine) tooth extraction

Number of participants referred for surgical exposure of the PDC · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

It is very uncertain whether double primary (canine and first molar) tooth extraction changes number of participants referred for surgical exposure of the PDC compared with single primary (canine) tooth extraction (very low certainty).

1 finding from 1 review

Double primary (canine and first molar) tooth extraction vs Single primary (canine) tooth extraction

Costs and cost‐effectiveness · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

The review found no eligible studies for this question.

1 finding from 1 review

Double primary (canine and first molar) tooth extraction vs Single primary (canine) tooth extraction

Reported improvement in the position of the ectopic canine measured from radiographs · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

The review found no eligible studies for this question.

1 finding from 1 review

Double primary (canine and first molar) tooth extraction vs Single primary (canine) tooth extraction

Patient‐reported outcome measures (PROMs) · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

The review found no eligible studies for this question.

1 finding from 1 review

Double primary (canine and first molar) tooth extraction vs Single primary (canine) tooth extraction

Time taken for the canine to erupt into the mouth · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

The review found no eligible studies for this question.

1 finding from 1 review

Double primary (canine and first molar) tooth extraction vs Single primary (canine) tooth extraction

Overall treatment time wearing orthodontic appliances · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

The review found no eligible studies for this question.

1 finding from 1 review

Thymosin alpha 1 (10-minute soak prior to replantation) vs Normal saline

Tooth survival · People with avulsed and replanted permanent (front) teeth

It is very uncertain whether thymosin alpha 1 (10-minute soak prior to replantation) changes tooth survival at 12 months compared with control (saline) (very low certainty).

2 findings from 1 review

Ledermix root canal medicament (day 0 to 10) vs Ultracal root canal medicament (day 7 to 10)

Aesthetics (discolouration) at 12 months (patient level) · People with avulsed and replanted permanent (front) teeth

It is very uncertain whether ledermix root canal medicament (day 0 to 10) changes aesthetics (discolouration) at 12 months (patient level) compared with ultracal root canal medicament (day 7 to 10) (very low certainty).

1 finding from 1 review

Ledermix root canal medicament (day 0 to 10) vs Ultracal root canal medicament (day 7 to 10)

Tooth survival · People with avulsed and replanted permanent (front) teeth
1 finding from 1 review

Extra-oral pulp extirpation at day 0 vs Intra-oral pulp extirpation at day 7

Radiographic resorption (proxy measure for periodontal healing) at 12 months · People with avulsed and replanted permanent (front) teeth

It is very uncertain whether extra-oral pulp extirpation at day 0 changes radiographic resorption (proxy measure for periodontal healing) at… compared with intra-oral pulp extirpation at day 7 (very low certainty).

1 finding from 1 review