Quad Helix vs RME for Posterior Cross-bite in Egyptian Children
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Quad Helix(QH) Appliance, Rapid Maxillary Expanders.
- Who it may be relevant to
- Registry conditions: Posterior Crossbite, Maxillary Expansion, Transverse Maxillary Deficiency. Basic parameters: 9 years — 12 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Egypt
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
Quad Helix Versus Rapid Maxillary Expanders in the Treatment of Posterior Cross-bite During Mixed Dentition in a Sample of Egyptian Children: A Randomized Clinical Study.
Overview
This randomized clinical trial aims to evaluate and compare the effectiveness of the Quad Helix (QH) appliance versus Rapid Maxillary Expanders (RME) in treating posterior cross-bite in Egyptian children during the mixed dentition stage. The study will also assess patient comfort and pain levels associated with each appliance.
Detailed description
The study involves 20 orthodontic patients aged 9-12 years with posterior cross-bite. Group A will receive the Quad Helix appliance, while Group B will receive Rapid Maxillary Expanders. Evaluation will be based on orthodontic study models, clinical photographs, and various radiographs including CBCT. Treatment will continue until complete correction is achieved, followed by a 3-month passive retention period.
Interventions
- Device Quad Helix(QH) Appliance
It is a fixed orthodontic appliance fabricated using stainless-steel wire and soldered to bands on upper first permanent molars. - Device Rapid Maxillary Expanders
It is a fixed expansion device bonded on the upper first permanent molars and pre-molars. Activation is done at a rate of 0.25 mm twice daily (two turns per day)
Primary outcome measures
- Maxillary Arch Width Changes [Time frame: Baseline and 6 months]
Secondary outcome measures (1)
- Treatment duration [Time frame: At the time of complete cross-bite correction (average of 6 months)]
Eligibility criteria
Inclusion criteria
- Children aged 9-12 years in the mixed dentition stage
- Presence of posterior cross-bite due to transverse maxillary deficiency
- No previous history of orthodontic treatment
- Good oral hygiene and cooperative behavior
- No significant antero-posterior or vertical skeletal discrepancies
Exclusion criteria
- Patient with craniofacial anomalies
- Presence of systemic diseases or syndromes affecting bone metabolism
- Extensive dental caries or untreated periodontal disease
- History of trauma or surgery affecting the maxilla or mandible
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Open label
- Primary purpose
- Treatment
Study locations
Egypt · 1 center
- Faculty of Dental medicine (boys) ,Cairo,Al-Azhar University — Cairo
Identifiers
NCT: NCT07500194 · MG-ORTHO-2026