Side effects or other adverse events · Adolescents and adults with malocclusion undergoing fixed orthodontic appliance treatment
The review found no eligible studies for this question.
1 finding from 1 review
Gingival inflammation-related index · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)
Herbal mouthwash reduced some gingival inflammation-related indices, but certainty is very low.
1 finding from 1 review
Duration of orthodontic treatment: alignment stage (mandibular arch) · Adolescents and adults with malocclusion undergoing fixed orthodontic appliance treatment
It is very uncertain whether light-emitting diode (LED) photobiomodulation changes duration of orthodontic treatment: alignment stage (mandibular arch) compared with conventional orthodontic appliance treatment (very low certainty).
1 finding from 1 review
Cariogenic bacteria (Mutans streptococci) · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)
Herbal mouthwash showed mixed effects on Mutans streptococci, with very low-certainty evidence.
1 finding from 1 review
Adverse effects on oral health: caries (lower arch) · People who had received fixed appliance orthodontic treatment
It is very uncertain whether full-time clear plastic (removable) retainer changes adverse effects on oral health: caries (lower arch) compared with any type of fixed (bonded) retainer (very low certainty).
1 finding from 1 review
Lightness change · Patients with post-orthodontic white spot lesions and permanent dentition
Knosel (2019) reported a statistically significant lightness-change effect.
3 findings from 1 review
Cohen's d 0.71 [0.32, 1.09]
1 study
GRADE not reported
Cohen's d -1.76 [-2.22, -1.30]
1 study
GRADE not reported
Cohen's d 0.40 [0.11, 0.65]
1 study
GRADE not reported
Color change · Patients with post-orthodontic white spot lesions and permanent dentition
Eckstein (2015) reported a statistically significant color-change effect.
4 findings from 1 review
Cohen's d 0.40 [0.11, 0.65]
1 study
GRADE not reported
Cohen's d 0.82 [0.43, 1.20]
1 study
GRADE not reported
Cohen's d 6.80 [5.70, 7.82]
1 study
GRADE not reported
Show 1 more finding
Lightness/brightness change of white spot lesion (luminosity L*, T0 to T1) · Patients with post-orthodontic white spot lesions and permanent dentition
ICON resin infiltration showed no statistically significant change in lightness/brightness of post-orthodontic white spot lesions at 6 months (pooled Cohen's d/SMD -0.001, 95% CI -0.23 to 0.23; 3 studies, 330 teeth; I2=97%); not GRADE-rated.
1 finding from 1 review
Color change of white spot lesion (color difference, T0 to T1) · Patients with post-orthodontic white spot lesions and permanent dentition
ICON resin infiltration significantly improved the color of post-orthodontic white spot lesions at 6 months (pooled Cohen's d/SMD 1.36, 95% CI 1.14 to 1.59; 4 studies, 458 teeth), although heterogeneity was very high (I2=98%) with a heavy outlier (Kannan); not GRADE-rated.
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
For a glass-ionomer-based bonding agent (single study), fluoride release significantly reduced WSL initiation (RR 0.64); subgroup not separately GRADE-rated.
1 finding from 1 review
Stability of crossbite correction (relapse of canine 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
Reported incidence or prevalence of root resorption of the impacted canine and/or incisors and/or first premolars · 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
Canine 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
Size of the lower jaw (arch length) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
Lacebacks with fixed appliances showed no clear difference in size of the lower jaw (arch length) compared with fixed appliances only (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
Schwarz appliance showed no clear difference in size of the lower jaw (mandibular arch length, change) at 9 months compared with no active treatment (control); GRADE not reported.
1 finding from 1 review
Incidence of eruption of the PDC into the mouth · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)
Double primary (canine and first molar) tooth extraction led to higher incidence of eruption of the PDC into the mouth compared with single primary (canine) tooth extraction; GRADE not reported.
4 findings from 1 review
RR 1.28 [1.06, 1.54]
2 studies · 96 participants
GRADE not reported
RR 0.68 [0.35, 1.31]
3 studies · 119 participants
Very low
RR 0.61 [0.29, 1.25]
1 study · 23 participants
GRADE not reported
Show 1 more finding
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 nitinol archwire changes amount of crowding (change) up to 37 weeks compared with titinol archwire (very low certainty).
1 finding from 1 review
Plaque · Adults undergoing orthodontic treatment
Aligners may reduce plaque index compared with fixed appliances in adults at 6-12 weeks (MD -0.58, 95% CI -0.82 to -0.34; very low certainty).
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
Active self-ligating brackets showed no clear difference in time to alignment (days) compared with passive self-ligating brackets; GRADE not reported.
1 finding from 1 review
Amount of crowding · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
1 finding from 1 review