Stability: Little's Irregularity Index (lower arch) · People who had received fixed appliance orthodontic treatment
It is very uncertain whether full-time clear plastic (removable) retainer changes stability: Little's Irregularity Index (lower arch) compared with any type of fixed (bonded) retainer (very low certainty).
1 finding from 1 review
Adverse effects on oral health: Gingival Index (lower arch) · People who had received fixed appliance orthodontic treatment
The review found no eligible studies for this question.
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
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
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 cervical pull headgear changes amount of crowding (lower incisor crowding) at 2 years compared with minor interceptive procedures (control) (very low certainty).
1 finding from 1 review
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 schwarz appliance changes amount of crowding (lower arch crowding, change) at 9 months compared with no active treatment (control) (very low certainty).
1 finding from 1 review
Lower incisor inclination (lingual tipping and retrusion) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
Self-ligating brackets showed no clear difference in lower incisors to mandible (inclination, degrees) compared with conventional brackets; GRADE not reported.
1 finding from 1 review
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
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
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
Lower incisors to mandible (relationship of lower front teeth to the mandible) · Children or adolescents (aged 16 years old or under) receiving orthodontic treatment to prevent or correct crowded teeth
Cervical pull headgear showed no clear difference in lower incisors to mandible at 2 years compared with minor interceptive procedures (control); GRADE not reported.
1 finding from 1 review
Cost‐effectiveness · Children aged 6 years and older (healthy except for dental caries)
In children aged 6 years and older, the cost-effectiveness estimate was extremely imprecise and not significant (OR 0.00, 95% CI 0.00 to 48704.6; ungraded).
1 finding from 1 review
Lower incisor inclination (lingual tipping and retrusion) · Children (approximately 11 years or older) with compromised mandibular first permanent molars
Bilateral lower first permanent molar extraction was associated with lingual tipping and retrusion of the lower incisors in one case-control study; ungraded.
1 finding from 1 review
Oral health-related quality of life · Completely edentulous people
Alginate (two stage-two step final/wash impression) may leads to higher participant-reported oral health-related quality of life… compared with silicone elastomer (two stage-two step) (low certainty).
1 finding from 1 review
Performance measures: lower extremity strength · Older or community-dwelling adults
Meta-analysis of randomised trials of vitamin D supplementation for Performance measures: lower extremity strength, Older adults: SMD 0.05 (95% CI -0.11 to 0.20), not statistically significant. Umbrella review outcome-level evidence grade: Substantial effect unlikely.
1 finding from 1 review
SMD 0.05 [-0.11, 0.20]
3 studies
GRADE not reported
Altered chin or lower lip skin sensation (binary) · Edentulous patients requiring improved denture retention
Preprosthetic surgery for a conventional denture (PPS) led to lower morbidity: altered sensation of the lower lip and chin compared with implant retained overdenture (dental implants) (IRO); GRADE not reported.
1 finding from 1 review
Morbidity: altered lower lip and chin sensation, measured at 1 year and 5 years (Risk Ratio, M-H Fixed; totals not selected). There was no statistically significant difference at either time point and no patients had…
1 study
GRADE not reported
Dissatisfied with lower denture · Edentulous patients requiring improved denture retention
Preprosthetic surgery for a conventional denture (PPS) showed no clear difference in dissatisfied with lower denture compared with implant retained overdenture (dental implants) (IRO); GRADE not reported.
1 finding from 1 review
Perceived need for surgery in adulthood · Children and adolescents (aged 16 years or younger) with prominent lower front teeth (Class III malocclusion)
The review found no eligible studies for this question.
1 finding from 1 review
Overjet · Children and adolescents (aged 16 years or younger) with prominent lower front teeth (Class III malocclusion)
Bone-anchored intermaxillary traction (BAIMT) led to higher overjet compared with removable mandibular retractor (RMR); GRADE not reported.
1 finding from 1 review