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Can years of dental school keep your breath fresh?

NCT ID NCT07740876

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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 03, 2026 · Last updated Aug 04, 2026 · Updated 1 time

Summary

This study looks at whether the length of dental education is linked to bad breath (halitosis), oral hygiene habits, and stress levels among dental students. Researchers will compare first-year and fifth-year dental students, measuring breath odor using both professional sniffing and a digital device, along with questionnaires about self-perceived breath and stress. The goal is to understand how dental training might influence students' own oral health practices and breath freshness.

What this could mean

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

What this could lead to
This research could highlight whether dental education improves students' own oral hygiene and reduces bad breath, offering insights for dental training programs.
What could go wrong
This is a small observational study with 100 students from one university, so findings may not apply to all dental students or the general population.

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.

Participants

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Nov 2026

An estimate. End dates often move.

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.

Who is studied

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 in this cross-sectional observational study. Eligible participants will be healthy students who meet the inclusion criteria and provide written informed consent. The study aims to evaluate the relationship between duration of dental education and halitosis by comparing objective and subjective halitosis measurements, including organoleptic assessment, volatile sulfur compound (VSC) measurements using a portable digital halitometer, halitosis perception questionnaires, tongue coating index, DMFT index, and perceived stress levels.

Ages

18 to 25 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: * 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.

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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.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Recep Tayyip Erdoğan University

    Rize, Turkey (Türkiye)

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