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New jaw expander tested to fix crowded teeth without pulling any out

NCT ID NCT07480148

Symptom relief 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study compares two devices—a self-activated leaf expander and a William's expander—to widen a collapsed lower jaw in 16 teenagers aged 12-16. The goal is to relieve mild to moderate crowding without removing teeth. Participants must have good oral health and no prior orthodontic treatment.

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 16 people

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

Started

Jun 2024

Expected to finish

Nov 2026

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

12 to 16 years

Sex

Female participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * An age from 12-16 years. * Low to average facial vertical pattern. * A mild to moderate crowding in mandibular arch with reduced transverse dimension which require non extraction orthodontic approach. * Similar amount of crowding on each side of the mandibular arch. * No previous orthodontic treatment. * Good oral and general health. Exclusion Criteria: * Severe crowding. * Steep mandibular plane. * Asymmetric crowding on both sides of the arch. * Shifting of mandibular dental midline. * Impacted lower 2nd premolar.

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As listed by the trial registrant

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

Mandibular expansion

Contacts and locations

Locations

  • Alazhar

    Naşr, Egypt