Gum treatment may clear up more than bad breath – study links oral health to smell

NCT ID NCT07424300

Completed Knowledge-focused Sponsor: Batman University Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at 101 adults with gum disease and bad breath to see if treating the gums could also improve their sense of smell. Participants received standard deep-cleaning dental treatment. Researchers measured bad breath gases and smell function before and one week after treatment. The goal was to understand if reducing gum inflammation and bad breath is linked to better smelling ability.

What this could mean

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

Active substance: nonsurgical periodontal therapy (scaling and root planing)
What this could lead to: If successful, this could show that treating gum disease improves both bad breath and sense of smell, pointing to a connection between oral health and olfactory function.
What could go wrong: This is a small, completed observational study, not a treatment trial. Results may not apply to everyone, and any changes in smell could be due to other factors.

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Conditions

The condition(s) this trial relates to.

Halitosis periodontitis

As listed by the trial registrant

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

HALITOSIS OLFACTORY DYSFUNCTION PERIODONTITIS

Contacts and locations

Locations

Batman University

Merkez, Batman, 72040, Turkey (Türkiye)

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