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New study tests which attachment removal method is less painful for aligner patients

NCT ID NCT07259642

Symptom relief Sponsor: Hacettepe 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested two methods for removing clear aligner attachments: one using special pliers followed by a drill, and the other using only a drill. Thirty-two adults who finished Invisalign treatment had each method tested on different sides of their mouth. Researchers measured pain levels and removal time to find which approach is more comfortable and efficient.

What this could mean

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

Active substance
Adhesive removal plier and tungsten carbide bur
What this could lead to
If one method is clearly less painful, dentists may adopt it to make the end of orthodontic treatment more comfortable for patients.
What could go wrong
This is a small, single-center study with only 32 participants, so results may not apply to everyone. Pain is subjective and can vary widely.

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

32 people

The number who actually took part.

Started

Apr 2024

Finished

Dec 2024

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

18 to 44 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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 aged 18 to 44 years with permanent dentition * No history of taking medication in the last 24 hours (e.g., painkillers, corticosteroids, and antiflu drugs) * Patients with no missing teeth except for third molars * Patients who underwent clear aligner treatment (Invisalign®) without an extraction protocol by one of the co-authors of the present study * Patients who completed aligner treatment and reached the attachment removal stage * Patients with at least 4 attachments in each quadrant of the mouth and a total of at least 16 attachments * Patients in good general and oral health with no periodontal disease Exclusion Criteria: * Patients with endodontic treatment, large restorations, and buccal restorations * Patients with a history of previous orthodontic treatment * The presence of systemic diseases that may cause dentin and enamel hypersensitivity * Patients who underwent surgical treatment and displayed signs of gingival recession * Patients who received teeth whitening in the last 8 weeks.

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As listed by the trial registrant

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

Orthodontic Orthodontic aligners Orthodontic pain (D013850) Orthodontic patient experience

Contacts and locations

Locations

  • Hacettepe University Faculty of Dentistry Department of Orthodontics

    Ankara, 06230, Turkey (Türkiye)

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