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Eggshells vs. fluoride: can a kitchen scrap beat standard cavity care?

NCT ID NCT07711132

Disease control 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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 17, 2026 · Last updated Jul 17, 2026

Summary

This trial tests whether a varnish made from nano-sized eggshell can help reverse the earliest stage of tooth decay (enamel caries) in adolescents aged 15-20. It compares the eggshell varnish against two established treatments: a CPP-ACP paste (GC Tooth Mousse) and a standard 5% sodium fluoride varnish. Over 12 months, the study measures changes in tooth remineralization using a laser device and clinical criteria to see which approach works best.

What this could mean

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

Active substance
nano-eggshell varnish, CPP-ACP paste, and sodium fluoride varnish
What this could lead to
If effective, nano-eggshell varnish could offer a natural, low-cost alternative to fluoride for reversing early tooth decay in teens.
What could go wrong
This is a small, early-stage trial with 90 participants, so results may not apply broadly. Nano-eggshell is experimental and may not outperform standard treatments.

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 90 people

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

Started

Dec 2025

Expected to finish

Dec 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

15 to 20 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: Patients' ages should be 15-20 years. Patients should have at least three to four teeth with ICDAS II scores of 1-2. Patients should have moderate-to-high caries risk. Exclusion Criteria: Known hypersensitivity to one of the components of the material under study. Systemic disorders or medication interfering with normal salivary flow.

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Conditions

The condition(s) this trial relates to.

enamel caries

As listed by the trial registrant

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

Initial dental caries

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

  • Faculty of Dentistry, Mansoura University

    RECRUITING

    Al Mansurah, Egypt