Masking effect / color improvement · Patients with white spot lesions or developmental enamel defects
Two studies compared resin infiltration with microabrasion, but no pooled or comparative effect estimate was reported (ungraded).
1 finding from 1 review
no estimate extracted
2 studies
GRADE not reported
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
Amount of tooth movement / reduction in crowding at 12 weeks · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
It is very uncertain whether coaxial nickel-titanium archwire changes amount of tooth movement / reduction in crowding at 12 weeks compared with nickel-titanium archwire (very low certainty).
1 finding from 1 review
Initiation of white spot lesions (WSL), visual-tactile assessment · Patients of any age (11-40 years) receiving comprehensive/fixed orthodontic treatment with fixed appliances
Among non-fluoride sealants, WSL initiation was significantly reduced versus no sealant (RR 0.69); subgroup not separately GRADE-rated.
1 finding from 1 review
Canine expansion · Children and adults with a posterior crossbite, without a Class III skeletal relationship, cleft lip or palate (or both), or other…
Fixed bonded Hyrax appliance followed by U-bow activator therapy showed no clear difference in canine expansion compared with no treatment; GRADE not reported.
1 finding from 1 review
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 removable tooth-borne expansion (expansion plate) (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…
Quad-helix plus multi-bracket appliance showed no clear difference in molar expansion compared with expansion arch plus multi-bracket appliance; GRADE not reported.
1 finding from 1 review
Length of treatment · 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 lower length of treatment compared with removable tooth-borne expansion (expansion plate) (moderate certainty).
1 finding from 1 review
Probing pocket depth (PPD/PD) · Adults undergoing orthodontic treatment
Aligners may reduce pocket depth compared with fixed appliances in adults at 6-12 weeks (MD -0.42 mm, 95% CI -0.71 to -0.12; very low certainty).
1 finding from 1 review
Stability of crossbite correction (relapse of 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
White spot lesions (WSLs), patient level · Adolescents/teenagers undergoing orthodontic treatment
A single study found no significant difference in white spot lesion formation (patient level) between aligners and fixed appliances in adolescents at 9 months (RR 0.33, 95% CI 0.10 to 1.04; ungraded).
1 finding from 1 review
RR 0.33 [0.10, 1.04]
1 study
GRADE not reported
Dentist satisfaction (masking effect) · Patients with dental fluorosis
Resin infiltration alone produced greater dentist-rated masking than in-office bleaching alone in one study (MD 3.97, 95% CI 3.33 to 4.61; ungraded).
1 finding from 1 review
MD 3.97 [3.33, 4.61]
1 study
GRADE not reported
Time to alignment · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
Vibrational appliance with fixed appliances showed no clear difference in time to alignment (days) compared with fixed appliances only / no vibrational appliance (control); GRADE not reported.
1 finding from 1 review
MD -3.70 [-26.29, 18.89]
2 studies
GRADE not reported
White spot lesions assessed by laser fluorescence (DIAGNOdent) · Patients of any age (11-40 years) receiving comprehensive/fixed orthodontic treatment with fixed appliances
White spot lesions were also measured by laser fluorescence in 3 sealant-vs-no-sealant studies, but no meta-analysis was possible due to incompatible reporting.
1 finding from 1 review
Initiation of white spot lesions (WSL), visual-tactile assessment · People receiving orthodontic treatment with fixed appliances (upper and/or lower full arch)
Fluoride-releasing compomer bonding agent did not show a statistically significant reduction in new white spot lesions versus non-fluoride compomer bonding agent (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…
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
S. mutans presence · Adolescents/teenagers undergoing orthodontic treatment
A single study found no significant difference in S. mutans presence between aligners and fixed appliances in adolescents at 1 month (RR 0.86, 95% CI 0.64 to 1.14; ungraded).
1 finding from 1 review
RR 0.86 [0.64, 1.14]
1 study
GRADE not reported
Amount of crowding (lower incisor crowding) at 10 weeks · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
It is very uncertain whether self-ligating brackets changes amount of crowding (lower incisor crowding) at 10 weeks compared with conventional brackets (very low certainty).
1 finding from 1 review
Intervention not reported
Initiation of white spot lesions (WSL), visual-tactile assessment
The intervention showed no clear difference in initiation of white spot lesions (WSL), visual-tactile assessment; GRADE not reported.
1 finding from 1 review
RR 1.02 [0.82, 1.27]
Studies not reported
GRADE not reported