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Evaluation of surface wear of composites used for clear aligner attachments

NCT ID NCT07812220

NEW Sponsor: Marmara University Source: ClinicalTrials.gov ↗

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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 Results may not be published yet.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
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Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 10, 2026 · Last updated Sep 10, 2026

Summary

The aim of this study is to investigate the amount of surface wear that may occur during treatment with different composite materials used for clear aligner attachments. Two different flowable composites (AlignerFlow LC, VOCO GmbH, Cuxhaven, Germany; AlignerConnect, GC, Tokyo, Japan) will be used to bond the attachments in split mouth designs. To determine the composite for the upper right segment, a coin toss will be performed. The remaining quadrants will be bonded with alternate composite resin. After bonding, intraoral scans will be performed from baseline to 6 months for every 2 months. Stl files obtained from the scans will be imported to NemoStudio, to evaluate the volume loss of the attachments.

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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

35 people

The number who actually took part.

Started

Dec 2024

Finished

Jul 2026

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

14 years and older

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: * Receiving Invisalign treatment at the Clinic of the Department of Orthodontics, Faculty of Dentistry, Marmara University * Mild to moderate crowding * Exhibiting good oral hygiene * No active dental caries * Voluntarily agreeing to participate in the study and signing the written informed consent form * Having no history of any syndrome, systemic disease, or allergy Exclusion Criteria: * Being pregnant or lactating * Presenting with advanced periodontal disease of a severity that could affect orthodontic treatment * Having prosthetic restorations within the oral cavity * Presenting with white spot lesions prior to orthodontic treatment

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As listed by the trial registrant

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

Clear aligner therapy Composite resins

Contacts and locations

Locations

  • Marmara University Faculty of Dentistry Department of Orthodontics

    Istanbul, 34854, Turkey (Türkiye)

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