Cochrane · intervention · CD006963

Treatments for adults with prominent lower front teeth

Cochrane Database of Systematic Reviews · 2012 · Cochrane Library

Oral Health Orthodontics2 versionsAMSTAR 2: not assessed

Full textEvery question was extracted from the full review (methods and results), not only its Summary of Findings table.

Questions

current version

GRADE rated

No studies

Included studies

as reported

No studies 1 · 14.3%Ungraded 6 · 85.7%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

Review question

Element	Planned (methods)	Found (results)
Population	Individuals 16 years of age or older at the time of treatment with an Angle Class III malocclusion (with or without lower/upper jaw surgery); participants with syndromes, clefts and traumatically-induced deformities excluded	Two RCTs with 83 participants. Ritzau 1989: 53 patients (41 females, 12 males), average age 23.4 years, combined orthodontic and surgical treatment for prognathism. Yoshioka 2008: 30 Japanese adults with a prognathic mandible (mean age 18 to 20 years).
Intervention	All types of orthodontic treatment without surgery, with dentoalveolar compensation; All types of orthodontic treatment with extraction, with dentoalveolar compensation and without surgery; All types of techniques of fixed orthodontic appliances with or without extraction and with or without surgery; Maxillary advancement alone; Maxillary advancement and mandibular setback; Mandibular setback with bilateral sagittal split osteotomy (BSSO); Mandibular setback with vertical subsigmoid osteotomy (VSSO); Subcondylar osteotomy; Segmental osteotomy; Vertical oblique osteotomy; Mandibular step osteotomy (MSO); Oblique sliding osteotomy; All types of fixation (rigid fixation with plates and/or screws, semi-rigid fixation with wires, intermaxillary fixation); Surgically-assisted rapid palatal expansion (SARPE); Maxillary transversal surgical expansion by transpalatal distractor and Le Fort I osteotomy; Maxillary surgical impaction; Others	Vertical ramus osteotomy with osteosynthesis (n=26); Intraoral vertical ramus osteotomy (n=15)
Comparison	No intervention; Another technique	Vertical ramus osteotomy without osteosynthesis (n=27); Sagittal split ramus osteotomy (n=15)
Outcomes	Correction of prominent lower front teeth measured by the relationship between upper and lower central incisors, canines and molars, plaster models and/or cephalometric data and clinical assessment (primary); Stability of correction measured 1 year after treatment; Changes in condyle position measured by tomography; Alteration of pharyngeal airway space dimensions; Alteration of signs and symptoms of respiratory disease (snoring, mouth breathing, nasal airway resistance); Reduction or treatment of obstructive sleep apnea syndrome (OSAS) or upper airway resistance syndrome (UARS); Morbidities, side effects or patients' self report; Patients' satisfaction measured by self report; Quality of life measured by validated scale	Changes in condyle position (n=53); Stability of correction (n=30)
Study designs	Randomized controlled trials (RCTs) or quasi-randomized controlled trials	Two parallel-group randomized controlled trials (Ritzau 1989; Yoshioka 2008), both at high overall risk of bias
Timing	Not specified	1 year post-surgery (stability assessed 1 week to 1 year)

Search date: 2012-03. Databases: Cochrane Oral Health Group Trials Register; Cochrane Central Register of Controlled Trials (CENTRAL); MEDLINE via OVID; EMBASE via OVID; LILACs; Biblioteca Brasileira de Odontologia (BBO); SciELO