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Gum showdown: calibrated brushes may beat regular ones for healthy smiles

NCT ID NCT06848790

Disease control Sponsor: Hospices Civils de Lyon 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested whether using a calibrated interdental brush (sized to fit each gap) reduces gum bleeding better than a non-calibrated brush in 51 healthy young adults aged 18-30. Participants used one type of brush daily for three months. The main goal was to compare gum inflammation between the two groups. Results could help improve daily oral hygiene advice.

What this could mean

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

Active substance
interdental brush (calibrated or non-calibrated)
What this could lead to
If calibrated brushes prove more effective, this could lead to clearer recommendations for preventing gum disease and related health issues.
What could go wrong
This is a small, completed trial with only 51 participants, so results may not apply to everyone. The study does not test long-term health outcomes.

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

51 people

The number who actually took part.

Started

Sep 2025

Finished

Apr 2026

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: * Person between 18 and 30 years old * Person who has given free, informed, express written consent * Person affiliated to a French social security system * Person living or working in Lyon or the Lyon conurbation served by public transport (TCL) Exclusion Criteria: * Person with a smoking addiction * Person participating in another study related to oral hygiene * Patients at high risk of infective endocarditis * Person with chronic pathologies * Person having taken antibiotic treatment during the month preceding the start of the study * Pregnant, parturient or breastfeeding woman * Persons deprived of liberty by a judicial or administrative decision * People receiving psychiatric care * Persons admitted to a health or social establishment for purposes other than research * Adults subject to a legal protection measure (guardianship, curatorship) * Persons not affiliated to a social security scheme or beneficiaries of a similar scheme * Person with fewer than 20 natural teeth * Person performing interdental hygiene and/or daily mouthwashes. * Person wearing orthodontic appliance * Person with periodontal disease (stage ≥ II periodontal lesions according to the Chicago 2017 classification (i.e. PD ≥ 4 mm, and/or CAL ≥ 4 mm) and/or generalized (\>30% of sites )), active caries or during dental care

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Conditions

The condition(s) this trial relates to.

periodontal disorder

As listed by the trial registrant

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

Microbiota-related disease Oral hygiene Periodontal diseases

Contacts and locations

Locations

  • Service de Soins Dentaires Et D'Odontologie

    Lyon, France

More trials for these conditions

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