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3D-Printed trays promise brighter smiles with less sensitivity

NCT ID NCT07464197

Symptom relief Sponsor: Universitat Internacional de Catalunya Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 study tests whether 3D-printed custom nightguards whiten teeth better and more comfortably than traditional ones. Forty adults with stained teeth will use a standard whitening gel at home. Researchers will measure color change, tooth sensitivity, and gum irritation to find the best tray design.

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

About 40 people

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

Started

May 2022

Expected to finish

Jul 2026

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

18 years and older

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: * Adults aged 18 years or older * Good general and oral health * No current medical treatment (self-reported) * No need for surgical, endodontic, periodontal, or restorative dental treatment * At least six upper and six lower anterior teeth free of caries and restorations * Maxillary central incisors with baseline shade A2 or darker * Willingness to follow the study protocol and use the study-provided oral hygiene products/instructions Exclusion Criteria: * Previous tooth bleaching treatment * Orthodontic appliances or prostheses that interfere with treatment * Severe intrinsic discoloration (e.g., tetracycline staining, fluorosis, or endodontically treated teeth with discoloration) * Pregnancy or lactation * Bruxism * Gingival recession, dentin exposure, visible enamel cracks, or other conditions associated with increased sensitivity * Use of anti-inflammatory or analgesic medication during the study period (according to protocol)

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Conditions

The condition(s) this trial relates to.

dentin sensitivity Tooth Discoloration

As listed by the trial registrant

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

Tooth discoloration Tooth staining

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

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    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

  • Clínica Universitària d'Odontologia UIC Barcelona

    RECRUITING

    Sant Cugat del Vallès, BARCELONA, 08195, Spain

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