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Braces for better breathing? study tests if jaw realignment opens airways in children

NCT ID NCT04190953

Knowledge-focused 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at whether orthodontic treatments like Twin Block and Hyrax appliances can improve breathing in children aged 8-14 with small jaws and narrow upper airways. Researchers will use 3D scans to measure changes in airway shape and airflow. The goal is to understand if correcting jaw alignment can reduce breathing effort, not to treat a disease directly.

What this could mean

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

Active substance
Orthodontic appliances (Twin Block and Hyrax)
What this could lead to
If successful, this could show that common orthodontic treatments may also improve breathing in children with certain jaw and airway problems.
What could go wrong
This is an early observational study, not a treatment trial. It measures airflow changes, not health outcomes, so real-world breathing benefits are uncertain.

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 90 people

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

Started

Feb 2020

Expected to finish

Mar 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

8 to 14 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: * children between the ages 8-14 years old (8-12 years old girls and 9-14 years old boys), presenting skeletal class II division 1 malocclusion with maxillary constriction Exclusion Criteria: * syndromic patients, previous ortho history, non-compliance, severe oral health issues (cavities, poor oral hygiene)

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Conditions

The condition(s) this trial relates to.

Apnea Binder syndrome metaphyseal dysplasia-maxillary hypoplasia-brachydacty syndrome Micrognathism Nasal Obstruction Retrognathia sleep apnea syndrome

As listed by the trial registrant

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

Airway obstruction, nasal Apnea Mandible small Maxillary hypoplasia

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

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