Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

10 questions · 10 findings · 1 reviews · Orthodontics

No studies found 0 · 0%GRADE not reported 6 · 60%Very low 0 · 0%Low 4 · 40%Moderate 0 · 0%High 0 · 0%

Fixed functional appliance (FORSUS FRD) vs Fixed functional appliance with mini-implants (FMI)

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Fixed functional appliance (FORSUS FRD) showed no clear difference in final overjet compared with fixed functional appliance with mini-implants (FMI); GRADE not reported.

1 finding from 1 review

Activator functional appliance vs Prefabricated functional myobrace appliance (PFA)

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Activator functional appliance showed no clear difference in final overjet compared with prefabricated functional myobrace appliance (PFA); GRADE not reported.

1 finding from 1 review

Removable functional appliance vs Fixed functional appliance

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Removable functional appliance may leads to higher final overjet compared with fixed functional appliance (low certainty).

1 finding from 1 review

Twin Block functional appliance vs Modified Twin Block appliances

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Twin Block functional appliance (conventional) showed no clear difference in final overjet compared with modified Twin Block appliances; GRADE not reported.

1 finding from 1 review

Fixed functional appliance (FORSUS FRD) vs Intermaxillary elastics

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Fixed functional appliance (FORSUS FRD) showed no clear difference in final overjet compared with intermaxillary elastics; GRADE not reported.

1 finding from 1 review

Activator functional appliance vs Fixed functional appliance (FORSUS FRD EZ)

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Activator functional appliance led to higher final overjet compared with fixed functional appliance (FORSUS FRD EZ); GRADE not reported.

1 finding from 1 review

Late treatment (one-phase) with removable functional appliance vs no treatment

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Late treatment (one-phase) with removable functional appliance may leads to lower final overjet compared with no treatment (low certainty).

1 finding from 1 review

Twin Block functional appliance vs Other functional appliances (Bionator, Herbst, R-appliance, Dynamax, Bite-Jumping)

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Twin Block functional appliance showed no clear difference in final overjet compared with other functional appliances (Bionator, Herbst, R-appliance, Dynamax,… (low certainty).

1 finding from 1 review

FMA stepwise advancement (SWG) vs FMA single step advancement (SSG)

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

FMA stepwise advancement (SWG) showed no clear difference in final overjet compared with FMA single step advancement (SSG); GRADE not reported.

1 finding from 1 review

Late treatment (one-phase) with fixed functional appliance vs no treatment

Final overjet · Adolescents (age 12 to 16 years) receiving orthodontic treatment to correct prominent upper front teeth (Class II malocclusion)

Late treatment (one-phase) with fixed functional appliance may leads to lower final overjet compared with no treatment (low certainty).

1 finding from 1 review