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Laser zaps bad breath: new study tests tongue light therapy

NCT ID NCT07433816

Symptom relief Sponsor: Medical University of Silesia Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 two methods for treating bad breath (halitosis) in 48 adults. One group cleaned their tongue with a scraper and used an antiseptic mouthwash. The other group used a tongue scraper plus a special laser on the tongue. All participants also had their teeth cleaned. The researchers measured breath chemicals and tongue bacteria over 3 months to see which approach worked better.

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

48 people

The number who actually took part.

Started

Jun 2025

Finished

Dec 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 50 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: * Participants diagnosed with halitosis based on an objective exhaled sulfhydryl (H2S) concentration of ≥ 112 ppb (1.5 ng/10 mL) determined by gas chromatography (Oral Chroma) and who signed an informed consent form previously approved by the Bioethics Committee were included in the study. Exclusion Criteria: The study excluded patients with a history of the following diseases: * otolaryngological, i.e., chronic tonsillitis (presence of tonsil plugs), chronic sinusitis, head and neck cancer * gastrointestinal, i.e., Helicobacter Pylori infection, esophageal diverticulitis, pyloric sphincter insufficiency, severe gastroesophageal reflux disease * pulmonary, i.e., bronchitis, bronchiectasis, lung cancer - metabolic, i.e., diabetes, uremia, chronic renal failure, and liver disease as well as individuals taking pharmacotherapies such as antihistamines, steroids, anticholinergics, antispasmodics, alcohol consumers, smokers, and those suffering from severe obesity. * on antibiotic or antifungals treatment up to 1 month before the survey, * pregnant Additinaly indyviduals with local abnormalities were excluded: using a removable device, implant and/or prosthesis, with carious lesions, during orthodontic and/or orthopedic treatment, with hypersensitivity to the photosensitizer to be used.

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Conditions

The condition(s) this trial relates to.

Halitosis

As listed by the trial registrant

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

Fetor oris Halitoses Halitosis Halitosis, halitoses, fetor oris, oral malodor Oral malodor

Contacts and locations

Locations

  • Department of Periodontology and Oral Mucosa Diseases

    Zabrze, Silesian Voivodeship, 41-800, Poland

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