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One tiny screw could fix your open bite

NCT ID NCT04419805

Disease control Sponsor: University of Dundee 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether a single temporary anchorage device (TAD) placed in the roof of the mouth can correct an anterior open bite by pushing the upper molars inward. Thirty-two orthodontic patients with a 1-6mm open bite will be randomly assigned to get either one palatal TAD or two buccal TADs. The goal is to see if the single TAD works as well and is more comfortable.

What this could mean

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

Active substance
temporary anchorage device (TAD)
What this could lead to
If successful, this could offer a simpler, less invasive way to correct anterior open bite using just one TAD instead of two.
What could go wrong
This is a small, early-stage trial with only 32 participants, so results may not apply to everyone. The device may not work as well as the standard two-TAD approach.

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 32 people

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

Started

Apr 2021

Expected to finish

Dec 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 40 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: * Patients with AOB of 1-6mm * Aged between (12 and 40 years). * Able to consent. * Patient due to undergo orthodontic treatment with fixed orthodontic braces. Exclusion Criteria: * Patient has previously had upper first permanent molar extraction. * Patient with congenital cleft of lip and/or palate or any other craniofacial anomalies. * Patient with bone disease or taking medications that affect the bone quality or nature. * Patient with an active digit sucking habit. * Pregnant or breastfeeding women

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As listed by the trial registrant

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

Anterior openbite

Contacts and locations

Locations

  • Dundee Dental Hospital

    Dundee, DD1 4HR, United Kingdom