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Braces-Free breakthrough? scientists test which aligner material holds up best

NCT ID NCT07449598

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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

Summary

This study looks at how clear aligners change after being worn for two weeks. Researchers will compare single-layer and multi-layer aligners in 20 people with mild crowding. They will measure surface roughness, hardness, and thickness before and after use to see which material performs better.

What this could mean

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

Active substance
clear aligner (device)
What this could lead to
If successful, this study could help orthodontists choose better aligner materials for more predictable tooth movement.
What could go wrong
This is a small, early-stage study with only 20 participants, so results may not apply to all patients or aligner brands.

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

20 people

The number who actually took part.

Started

Jan 2026

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

16 to 24 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: * Class I malocclusion with mild-moderate crowding (≤5 mm per arch). * Full permanent dentition (excluding third molars). * No restorations, caries, or attachments planned on the labial surface of upper/lower central incisors. Exclusion Criteria: * Systemic disease affecting saliva. * Parafunctional habits (bruxism, nail-biting). * Smoking. * Pregnancy. * Previous orthodontic treatment within 1 year.

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As listed by the trial registrant

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

Surface roughness and thickness clear aligner sheat

Contacts and locations

Locations

  • Mansoura university

    Al Mansurah, Egypt