The study population will consist of undergraduate dental students enrolled at Recep Tayyip Erdoğan University Faculty of Dentistry. A total of 100 students, including 50 first-year and 50 fifth-year dental students, will be included. Eligible participants will be healthy students who meet the study criteria and provide written informed consent. Participants will undergo subjective and objective halitosis assessments, including questionnaires, organoleptic evaluation, volatile sulfur compound measurements, tongue coating assessment, and DMFT index recording.
Who can participate
Age range
18 Years – 25 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Undergraduate students enrolled in the Faculty of Dentistry at Recep Tayyip Erdoğan University.
* First-year and fifth-year dental students who agree to participate in the study and provide written informed consent.
* Healthy students with no systemic diseases affecting oral health or halitosis assessment.
* Students with normal nasal breathing ability.
* Participants who comply with the pre-assessment instructions required for accurate halitosis measurements.
* Participants who are able to complete the questionnaires and clinical evaluation procedures.
Exclusion Criteria:
* Students with systemic diseases that may affect halitosis, including diabetes mellitus, respiratory disorders, liver cirrhosis, chronic renal failure, or gastrointestinal disorders.
* Participants with active upper respiratory tract infection, sinusitis, tonsilloliths, or other conditions affecting oral odor.
* Participants with a history of antibiotic use within the previous 3 weeks.
* Pregnant or breastfeeding students.
* Students unwilling to provide written informed consent.
* Students receiving active orthodontic treatment or requiring orthognathic treatment.
* Participants unable to comply with the pre-assessment restrictions (dietary restrictions, oral hygiene restrictions, smoking and product-use restrictions) before halitosis evaluation.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Halitosis Level Assessed by Organoleptic Evaluation
Timeframe: Baseline
2
Volatile Sulfur Compound (VSC) Levels Measured by Portable Digital Halitometer
Timeframe: Baseline
3
Self-Perceived Halitosis Level Assessed by Visual Analog Scale (VAS)
Timeframe: Baseline
Trial details
NCT IDNCT07740876
SponsorRecep Tayyip Erdogan University Training and Research Hospital