3D imaging reveals which jaw brace works best for kids
NCT ID NCT07687927
First seen Jul 07, 2026 · Last updated Jul 08, 2026 · Updated 1 time
Summary
This study compares two types of dental appliances—a fixed Twin Block and a removable Twin Block—used to treat a condition where the lower jaw sits too far back in growing children and teenagers. Both appliances guide the lower jaw forward during growth. Using 3D scans before and after treatment, researchers will measure changes in jaw bones, teeth, facial profile, and the jaw joint to see which appliance works better.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Twin Block appliance (fixed or removable)
- What this could lead to
- If one appliance proves more effective, it could lead to better treatment guidelines for correcting jaw alignment in growing children.
- What could go wrong
- This is a small, early-stage study with only 20 participants, so results may not apply to all patients. Both appliances require compliance and may cause temporary discomfort.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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20 people
The number who actually took part.
- Started
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Nov 2023
- Finished
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Dec 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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11 to 15 years
- Sex
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Male participants only
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Growing male patients (as judged from clinical examination and confirmed later by (CVM) 2. Skeletal class II with retrognathic mandible. 3. Healthy compliant and motivated patient. 4. No Previous orthodontic treatment. 5. No Severe facial asymmetry determined by clinical or radiographic examination. 6. No Systemic diseases that may affect the treatment results. 7. No tmj disorders. Exclusion Criteria: 1. Previous orthodontic treatment. 2. Poor oral hygiene. 3. Severe facial asymmetry determined by clinical or radiographic examination. 4. Systemic disease that may affect the treatment results. 5. TMJ disorders.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Faculty of Dental Medicine, Al-Azhar University
Cairo, Cairo Governorate, 11765, Egypt
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