An interventional study of Tongue scraper and oral rinse treatment and Tongue scraper and aPDT (photodynamic therapy) in Halitosis, Halitoses and Fetor Oris, sponsored by Medical University of Silesia. Completed at 1 site in Poland. Open to participants aged 18 Years to 50 Years. Per ClinicalTrials.gov, last updated 2026-03-05.
Sponsored by Medical University of Silesia · Not applicable, Interventional, and Treatment
The aim of this study is to compare the effectiveness of two methods of treating bad breath. Patients are enrolled in the study based on an objective test using the Oral Chroma Device, which measures the concentration of volatile sulfur compounds in exhaled air, which are responsible for bad breath. Before the test begins, a sample will also be taken from the tongue to determine the total number of microorganisms. Patients are then randomly assigned to two groups.
Control group: Cleaning the tongue with a tongue scraper and rinsing the mouth with an antiseptic mouthwash.
Intervention group: Cleaning the tongue with a tongue scraper and antibacterial laser therapy on the tongue.
Then, all study participants will undergo a procedure to clean tartar from all their teeth.
Questions to be answered by the study: Will there be a decrease in the concentration of volatile sulfur compounds in exhaled air after treatment? Will the treatment results obtained after laser therapy be better compared to the classic method of treating bad breath? Cleaning procedures within the tongue will be performed at the beginning, then repeated after one week, two weeks, and 3 months from the baseline.
After each stage, the concentration of substances in exhaled air that are responsible for bad breath will be measured. Samples will be taken from the tongue to determine the total number of microorganisms before the first tongue cleaning, and then after 2 weeks from the intervention.
93 studies on the registry are indexed under Halitosis; 17 are open to participants now.
This study's enrollment of 48 is close to the median of 45 across 79 interventional studies indexed under Halitosis.
Browse Halitosis studies →Medical University of Silesia is the lead sponsor of 115 studies on the registry; 26 are open to participants now.
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Exclusion Criteria:
The study excluded patients with a history of the following diseases:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Procedure: Tongue scraper and aPDT (photodynamic therapy) · Procedure: full mouth scaling
Procedure: Tongue scraper and oral rinse treatment · Procedure: full mouth scaling
The procedure involves treating the tongue with a tongue scraper and rinsing the mouth with a chlorhexidine solution.
The procedure involves treatment with a tongue scraper and photodynamic therapy with toluidine blue using a diode laser.
removal of tartar deposits within both dental arches
Total number of microorganisms
Swab samples were collected from the dorsum of the tongue (posterior third). The material collected from the tongue was inoculated separately onto the Rodac ConTact Test to determine the total number of microorganisms.
Time frame: At the baseline, 2 weeks after the baseline
Values of concentration of VSCs (volatile sulfur compounds) in exhaled air
Values of concentration of VSCs above 112 ppb (1.5 ng/10 mL) were indicators of halitosis.
Time frame: at the baseline, one week after the baseline, two weeks after the baseline,3 months after the baseline
Plan to share: No
No publications or documents are linked to this record.
Ran from Jun 2025 to primary completion in Oct 2025, 4 months.
Of 35 non-industry interventional studies with no phase under Halitosis, half reached primary completion within 10 months of starting (the median), counting those still running; a quarter within 3 and three quarters within 18. This study's 4 months is below that.
Counting every sponsor, half of 43 studies reached it within 10 months; a quarter within 3 and three quarters within 18.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Feb 2026. You cannot join it, but the record below documents what was studied.
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Medical University of Silesia →