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Dental device showdown: which expander moves molars best?

NCT ID NCT07534072

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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested two different dental expanders in 30 teenagers aged 15-18 who needed their upper molars moved backward to correct a Class II bite. One device was a self-activated Leaf Expander and the other a conventional Hyrax Expander, both anchored to the jawbone. The goal was to see which one worked better and caused fewer side effects.

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

30 people

The number who actually took part.

Started

Jan 2024

Finished

Aug 2025

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

15 to 18 years

Sex

Anyone

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: * • Class II molar relation. * Patients aged between 15 and 18 years. * Overjet less than 6 mm * ANB angle between 5° and 7°. * Non-extraction treatment plan with molar distalization. * Horizontal or normal growth pattern with symmetrical, balanced facial appearance. * Minimal crowding in the mandibular arch. Exclusion Criteria: * Congenitally missing teeth * Congenital anomalies * Systemic diseases * Previous orthodontic treatment

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As listed by the trial registrant

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

Orthodontic patients

Contacts and locations

Locations

  • Al- Azhar University

    Cairo, Nasr City, 4450113, Egypt

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