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Can a simple mouth appliance fix a receding jaw in kids?

NCT ID NCT03286569

Disease control Sponsor: University of Alberta Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether an upper jaw expansion device can encourage the lower jaw to grow forward in children aged 9-11 with an overbite. Sixty participants will receive either an active or non-active Wilson quadhelex appliance for 9 months. Jaw growth is measured with special X-rays before and after treatment.

What this could mean

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

Active substance
Wilson quadhelex appliance (dental device)
What this could lead to
If it works, this could provide a non-surgical way to help children with a receding lower jaw achieve better jaw alignment.
What could go wrong
This is a small, early-stage study with only 60 participants. The device may not produce meaningful lower jaw growth, and results may not apply to all children.

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 60 people

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

Started

Apr 2019

Expected to finish

Feb 2027

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 11 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: 1. Class II skeletal due to lower jaw backward projection 2. Class II malocclusion 3. Early mixed dentition (all first permanent molars erupted, as well as all erupting upper and lower permanent incisors) Exclusion Criteria: 1. Other orthodontic treatment provided 2. Growth problems (craniofacial syndromes, etc.)

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Conditions

The condition(s) this trial relates to.

malocclusion due to protuberant upper front teeth Overbite

As listed by the trial registrant

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

Overbite (excessive) horizontal

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

  • University of Alberta

    RECRUITING

    Edmonton, Alberta, T6G 2R3, Canada

More trials for these conditions

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