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Can a simple brace fix your bite for good?

NCT ID NCT07752498

Knowledge-focused Sponsor: Region Jönköping County 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 07, 2026 · Last updated Aug 07, 2026

Summary

This study looks at whether the bite correction from a Twin Block appliance—a removable brace used to fix overbites—stays put over time. Researchers will compare dental records from before, right after, and years after treatment in 72 people who previously wore the appliance. They want to see if the bite relapses and how many people needed extra treatment with fixed braces.

What this could mean

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

Active substance
Twin block appliance (removable orthodontic device)
What this could lead to
If the results show lasting stability, it could support Twin Block as a reliable one-time treatment for certain bite problems, reducing the need for additional braces.
What could go wrong
This is an observational study, so it can't prove cause and effect. Results may vary due to individual growth patterns and compliance, and the findings might not apply to all patients.

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.

Participants

About 72 people

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

Started

Jul 2026

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

The patient cohort was originally recruited and treated from December 2018 to October 2020 The inclusion criteria for the previous study were healthy patients according to the American Society of Anaesthesiology Classification (ASA I and II), aged 8-14 years at treatment start and with an overjet of 6 mm or more together with an incomplete lip closure. Exclusion criteria were severe chronic conditions such as asthma and allergy, neuropsychiatric disorders, craniofacial syndromes, and previous orthodontic treatment. Recruitment of the patients continued until the number of participants met the estimated sample size. This patient group were then contacted again for recruitement to the present study during June 2026 to August 2026.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

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: Patient participated in the previous study "Patient compliance with Twin Block appliance during treatment of Class II malocclusion: a randomized controlled trial on two check-up prescriptions" .Eur J Orthod. 2023. https://doi.org/10.1093/ejo/cjac046 Exclusion Criteria: None

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Conditions

The condition(s) this trial relates to.

malocclusion due to protuberant upper front teeth Malocclusion, Angle Class II Overbite

As listed by the trial registrant

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

Malocclusion, angle class II Orthodontic appliances, removable Overbite (excessive) deep Overbite (excessive) horizontal Treatment outcome

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

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    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

  • The Institute of Postgraduate Dental Education

    Jönköping, Jönköping County, 551 11, Sweden

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