Findings

What do systematic reviews say?

4 questions · 4 findings · 3 reviews · All outcomes

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No studies found 0 · 0%GRADE not reported 4 · 100%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Unilateral extraction of the mandibular first permanent molar vs Bilateral extraction of the mandibular first permanent molars

Midline deviation of the mandibular arch · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

One study found midline deviation more likely after unilateral than bilateral extraction (OR 11.6; single study; not GRADE-rated).

1 finding from 1 review

Spontaneous space closure after extraction of permanent first molars in children and adolescents: a systematic review… 2024 All outcomes
Until eruption of the permanent second molar (median follow-up 4.0 years) · University clinics and hospitals in 8 countries (children/adolescents <18 years) · Mandible
OR 11.6 [1.9, 70.3]
1 study
GRADE not reported

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

Effect of severity of PDC displacement towards the midline on the proportion of successful eruptions · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

1 finding from 1 review

Interventions for promoting the eruption of palatally displaced permanent canine teeth, without the need for surgical… 2021 · Cochrane All outcomes
12 to 48 months · By baseline sector (severity of displacement)
Tables 11-15 (Hadler-Olsen 2020; Bonetti 2010; Bonetti 2011): partial relationship between severity of medial displacement and successful eruption; e.g. at 18 months 17/75 (23%) sector 2 erupted vs 1/17 (6%) sector 3,…
3 studies
GRADE not reported

Extraction of the primary (baby) canine (single primary tooth extraction) vs No extraction (non-intervention control)

1 finding from 1 review

Interventions for promoting the eruption of palatally displaced permanent canine teeth, without the need for surgical… 2021 · Cochrane All outcomes
12 months · By baseline sector (severity of displacement)
Table 4 (Naoumova 2015): probability of successful eruption depended on displacement severity; sector 2 (mild) 14/19 (74%) erupted vs sector 4 0/10 erupted; data refer to 59 teeth (mITT).
1 study · 59 participants
GRADE not reported

Extraction of the primary maxillary canine vs no intervention

Improvement in the vertical position or angulation of the ectopic canine, measured from radiographs · Children with palatally displaced maxillary canines (at least 80% aged 10 to 13 years); trials with craniofacial syndromes or anomalies…

1 finding from 1 review

Extraction of primary (baby) teeth for unerupted palatally displaced permanent canine teeth in children 2012 · Cochrane All outcomes
At least 6 months follow-up after the intervention
Changes in the position of the displaced canine measured from radiographs, reported by both trials as medians (non-normal distribution): changes in the inclination of the canine to the midline, the distance of the…
2 studies
GRADE not reported