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Dental showdown: which brace works best for Kids' crossbite?

NCT ID NCT07500194

Disease control Sponsor: Al-Azhar University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study compares two fixed dental appliances—Quad Helix and Rapid Maxillary Expanders—for treating posterior crossbite in 20 Egyptian children aged 9-12. The goal is to see which device widens the upper jaw more effectively and causes less discomfort. Results could help dentists choose the best option for young patients.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Quad Helix appliance and Rapid Maxillary Expander (both dental devices)
What this could lead to
If successful, this study could show which device works better and is more comfortable for correcting crossbites in children, improving dental health and quality of life.
What could go wrong
This is a small, early-stage trial with only 20 participants, so results may not apply to all children. The study hasn't started yet, and outcomes depend on patient cooperation.

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

About 20 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Mar 2026

An estimate. Start dates often move.

Expected to finish

Mar 2028

An estimate. End dates often move.

Lead sponsor

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

9 to 12 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show 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. Children aged 9-12 years in the mixed dentition stage 2. Presence of posterior cross-bite due to transverse maxillary deficiency 3. No previous history of orthodontic treatment 4. Good oral hygiene and cooperative behavior 5. No significant antero-posterior or vertical skeletal discrepancies Exclusion Criteria: 1. Patient with craniofacial anomalies 2. Presence of systemic diseases or syndromes affecting bone metabolism 3. Extensive dental caries or untreated periodontal disease 4. History of trauma or surgery affecting the maxilla or mandible

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Maxillary expansion Posterior crossbite Transverse maxillary deficiency

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Faculty of Dental medicine (boys) ,Cairo,Al-Azhar University

    Cairo, Cairo Governorate, 00000, Egypt

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