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New gel could halt tooth decay in preschoolers without drilling

NCT ID NCT06241261

Disease control Sponsor: The University of Hong Kong 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether a gel containing silver diamine fluoride can stop cavities in preschool children as effectively as the standard liquid version. About 630 healthy children with at least one cavity will receive the gel or solution every six months for 30 months. The goal is to see if the gel hardens the cavities and prevents them from getting worse.

What this could mean

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

Active substance
silver diamine fluoride gel
What this could lead to
If it works, this could offer a simpler, more acceptable way to stop cavities in young children without drilling.
What could go wrong
This is a mid-stage trial with 630 children; the gel may not work as well as the standard solution, and results may not apply to all children.

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

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 630 people

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

Started

Jan 2024

Expected to finish

Dec 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

3 to 5 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: * generally healthy, have at least one tooth with cavitated dentine carious lesion Exclusion Criteria: * uncooperative and difficult to manage, with severe forms of hypoplasia of fluorosis or other oral diseases, wearing orthodontic devices or under dental treatment, have major systemic diseases, or are on long-term medication

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Conditions

The condition(s) this trial relates to.

cardiac arrest dental caries

As listed by the trial registrant

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

Early childhood caries

Contacts and locations

Locations

  • The University of Hong Kong

    Hong Kong, China

More trials for these conditions

Other studies related to the condition(s) this trial covers.