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Charcoal toothbrush showdown: cleaner bristles or just hype?

NCT ID NCT07275684

Knowledge-focused Sponsor: Mohammed V University in Rabat 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study compared charcoal-impregnated toothbrushes to regular ones to see if they reduce bacterial buildup. Thirty-two dental students brushed twice daily for 21 days, then their toothbrushes were tested for germs. The goal is to find out if charcoal bristles keep toothbrushes cleaner.

What this could mean

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

Active substance
Charcoal-impregnated toothbrush bristles
What this could lead to
If charcoal bristles reduce bacteria, it could lead to toothbrushes that stay cleaner between uses, possibly improving oral hygiene.
What could go wrong
This is a small, early study with only 32 healthy students. Results may not apply to the general population, and any benefit may be minor.

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 2025

Finished

Jun 2025

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 24 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: * Students of the Faculty of Dental Medicine of Rabat (4th or 5th year) aged 18-24 years. * In good general health with no systemic diseases. * Regular users of manual toothbrushes, brushing at least twice daily. * Informed about the study and have signed informed consent. * Willing to use the assigned toothbrush and follow study instructions for brushing technique, toothpaste use, and storage of the toothbrush. Exclusion Criteria * Irregular frequency of tooth brushing. * Unwillingness to use a charcoal-impregnated toothbrush or known allergy to activated charcoal. * Use of antiseptic mouthwash and/or antiseptic toothpaste. * Smoking. * Presence of systemic disease. * Current or recent antibiotic therapy (within the 4 weeks prior to the study). * High plaque index (\>2, Silness \& Löe). * Periodontitis. * Severe gingivitis (gingival index \>2, Löe \& Silness). * Wearing orthodontic appliances. * Current oro-pharyngeal infections.

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As listed by the trial registrant

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

Bacterial contamination Oral hygiene Toothbrush contamination

Contacts and locations

Locations

  • Faculty of Dental Medicine of Rabat, Mohammed V University

    Rabat, Al Irfane, 6212, Morocco

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