Fixed tooth-borne expansion (quad-helix) vs Removable tooth-borne expansion (expansion plate): Molar expansion
- Population
- Children and adults with a posterior crossbite without a Class III skeletal relationship, cleft lip or palate, or other syndrome associated with craniofacial anomalies (all included studies were children aged 5 to 16 years)
- Intervention
- Fixed tooth-borne expansion (quad-helix)
- Comparison
- Removable tooth-borne expansion (expansion plate)
- Outcome
- Molar expansion
Fixed quad-helix appliance (slow maxillary expansion) probably leads to higher molar expansion (inter-molar distance) compared with removable expansion plate (slow maxillary expansion) (moderate certainty).
What each review found
Current versions only| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Fixed quad-helix appliance (slow maxillary expansion) vs Removable expansion plate (slow maxillary expansion) Molar expansion (inter-molar distance) · Children and adults with a posterior crossbite without a Class III skeletal relationship, cleft lip or palate, or… · Children in early mixed dentition (8-10 years) Fixed quad-helix appliance (slow maxillary expansion) probably leads to higher molar expansion (inter-molar distance) compared with removable expansion plate (slow maxillary expansion) (moderate certainty). Orthodontic treatment for posterior crossbites (2014) · Cochrane All outcomesearlier version CD000979.PUB2, superseded | MD 1.15 [0.40, 1.90] | 2 studies · 96 participants | Moderate |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Orthodontic treatment for posterior crossbites 2021 · Cochrane All outcomes | 2021-04 | Not listed | Not assessed |
Related questions
The same intervention and outcome, asked in another population or against another comparator.
- Fixed tooth-borne expansion (quad-helix) vs observation · Children and adults with a posterior crossbite, without a Class III skeletal… · 1 review
- Fixed tooth-borne expansion (quad-helix) vs Removable tooth-borne expansion (expansion plate) · Children and adults with a posterior crossbite, without a Class III skeletal… · 1 review
- Fixed tooth-borne expansion (quad-helix) vs Composite onlays · Children and adults with a posterior crossbite without a Class III skeletal… · 0 reviews
How reviews are matched to this question
Reviews word the same question differently. Four decision models (TypeSafe's Jev, Liquid AI's d1-ultra, SubQ Snap and Baseten's Elephant) judged each wording of the population, intervention, comparator and outcome against the others; two wordings count as the same when at least three of them agree and none clearly disagrees, and findings count as this question only when all four elements match. Timing, setting and subgroup never split a question: they are shown on each finding.