Posterior resin bite turbos with a HYRAX expander to speed up maxillary expansion in early teens
Official title: Effect of Posterior Disarticulatory Resin Bite Turbos on the Rate of Maxillary Expansion Using HYRAX Expander in Early Adolescent Patients: Randomized Controlled Clinical Trial
Run by Mansoura University · NCT07739498 · Data updated 2026-11-12
This trial tests whether adding posterior resin bite turbos with a HYRAX expander can speed up and improve maxillary expansion in early adolescents with bilateral posterior crossbite.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 10 Years to 14 Years |
| Sex | All |
| Enrollment | 22 (estimated) |
| Sponsor | Mansoura University Academic / other |
| Locations | 1 site (Al Mansurah) |
| Status | Recruiting |
| Started | February 15, 2026 |
| Main results expected | April 2027 |
| Study ends | June 2027 |
| Registry record updated | August 17, 2026 |
| Trial ID | NCT07739498 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are 10–14 year-olds with bilateral functional lateral crossbite and good general/oral health, without prior orthodontic treatment.
✕Probably not a fit
Patients with cleft lip/palate, severe facial asymmetry, anterior open bite, systemic conditions affecting tooth movement, or those who have had prior orthodontic treatment may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This randomized controlled trial compares maxillary expansion using a HYRAX expander with or without posterior disarticulatory resin bite turbos in early adolescents. Participants aged 10–14 with bilateral posterior crossbite are randomly assigned to receive either the bite turbo modification or the conventional expander. Serial digital intraoral scans will measure changes in maxillary dimensions weekly, while CBCT imaging before expansion and after retention will assess skeletal and dental outcomes. The study aims to determine if occlusal contact modification can influence the rate and pattern of expansion during treatment. The research is conducted as part of a Master’s thesis in Orthodontics at Mansoura University.
Why it matters
Potential benefit: If successful, patients could achieve faster or more favorable maxillary expansion with the same appliance.
How similar studies have gone: Previous work has explored bite turbos and expansion approaches, but this specific combination with HYRAX expander in this age group is relatively novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. Patients aged 10-14 years. 2. Bilateral posterior cross bite. 3. Functional lateral cross bite. 4. Good general and oral health. 5. Normal to decreased vertical height )average FMA 29.7 °± 4.2 °).23 Exclusion Criteria: 1. Patients with cleft lip and palate. 2. Severe facial asymmetry. 3. Anterior open bite. 4. Systemic conditions affecting tooth movement (e.g., diabetes, bone disorders). 5. Previous orthodontic treatment.
Where it's running
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Orthodontic Department - Faculty of Dentistry Mansoura University
Al Mansurah, Egypt Recruiting
Study contacts
- Principal investigator: Donia Alashker — Faculty of Dentistry Mansoura University
- Study coordinator: Donia Alashker
- Email: donyaalashker7@mans.edu.eg
- Phone: 00201557372170
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.