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Which brace works best? small study pits twinblock against monoblock

NCT ID NCT07277543

Disease control Sponsor: Faculty of Dental Medicine for Girls 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 completed study looked at 18 girls aged 9 to 12 with a type of jaw misalignment called skeletal Class II. Researchers compared two dental devices—twinblock and monoblock—to see which one better corrected the jaw and teeth position. Participants wore the device for 15 hours a day after an initial bite adjustment. The goal was to find out which appliance leads to better skeletal and dental changes.

What this could mean

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

Active substance
twinblock and monoblock orthodontic appliances
What this could lead to
If successful, this could show which device works better for correcting jaw alignment in growing children, potentially improving treatment choices.
What could go wrong
This is a small, completed trial with only 18 participants, so results may not apply to all patients. It compares devices, not a new treatment, so impact is limited.

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

18 people

The number who actually took part.

Started

Oct 2023

Finished

Sep 2025

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.

Ages

9 to 12 years

Sex

Female participants only

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: * Female patients to avoid any sexual dimorphism which may affect the comparison. * Skeletal Class II (ANB° \> 5°) with normal maxilla (SNA° = 82° ±4°) and retrognathic mandible (SNB° \< 87°). * Age range from 9 to 12 years. Exclusion Criteria: * Previous history of orthodontic treatment. * Congenitally missing or extracted permanent teeth. * Posterior cross bites or severe maxillary transverse deficiency. * Severe facial asymmetry determined by clinical or radiographic examination. * Poor oral hygiene. * Systemic diseases that may affect the treatment results.

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As listed by the trial registrant

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

Dentoskeletal changes in skeletal classii

Contacts and locations

Locations

  • Shimaa Nasr

    Cairo, Egypt