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 lacebacks with fixed appliances changes amount of crowding (change) at 6 months compared with fixed appliances only (control) (very low certainty).
1 finding from 1 review
Molar expansion · 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) probably leads to higher molar expansion (inter-molar distance) compared with observation (no treatment) (moderate certainty).
1 finding from 1 review
Harms (discomfort) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
1 finding from 1 review
Size of the lower jaw (arch length, change) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
Extraction of third molars (wisdom teeth) led to higher size of the lower jaw (arch length, change) compared with no active treatment (control); GRADE not reported.
1 finding from 1 review
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
Signs and symptoms of temporomandibular joint dysfunction · 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
no estimate extracted
0 studies
No studies found
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 lingual arch led to higher lower incisors to mandible at 1 year compared with no active treatment (control); GRADE not reported.
1 finding from 1 review
Size of the lower jaw (arch length, change) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
Extraction of lower deciduous canines led to lower size of the lower jaw (arch length, change) at 1 year compared with no active treatment (control); GRADE not reported.
1 finding from 1 review
Lesion area (decalcification area, pixels) · Adults undergoing orthodontic treatment
A single study reported a larger decalcification lesion area with aligners versus fixed appliances in adults at 3 months (MD 80.50 pixels, 95% CI 60.52 to 100.48; ungraded).
1 finding from 1 review
MD 80.50 [60.52, 100.48]
1 study
GRADE not reported
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
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
Schwarz appliance led to higher lower incisors to mandible (position, mm) at 9 months compared with no active treatment (control); GRADE not reported.
1 finding from 1 review
Time to alignment · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
Copper nickel-titanium archwire showed no clear difference in time to alignment (days) compared with nickel-titanium archwire; GRADE not reported.
1 finding from 1 review
Amount of crowding (upper anterior crowding) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
1 finding from 1 review
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
no estimate extracted
0 studies
No studies found
Canine expansion · 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) probably leads to higher canine expansion (inter-canine distance) compared with observation (no treatment) (moderate certainty).
1 finding from 1 review
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-bone-borne expansion showed no clear difference in molar expansion (inter-molar distance) compared with fixed tooth-borne expansion (Hyrax) (low certainty).
1 finding from 1 review
Lower molars to mandible (relationship of lower back teeth to the mandible) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
Lower lingual arch led to lower lower molars to mandible at 1 year compared with no active treatment (control); GRADE not reported.
1 finding from 1 review
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) probably leads to higher crossbite correction compared with removable tooth-borne expansion (expansion plate) (moderate certainty).
1 finding from 1 review
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
no estimate extracted
0 studies
No studies found
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 multistranded stainless steel 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