Clinical trial Recruiting at 1 site Observational Ages 18 to 65

Periodontal status, smoking, and salivary inflammasome markers

Official title: The Impact of Periodontal Status and Smoking on Salivary Inflammasome Levels: A Cross-Sectional Study

Run by Uskudar University · NCT07312552 · Data updated 2026-11-12

This trial will test whether levels of salivary inflammasome proteins (NLRP-3, NLRP-6, NLRP-12, NLRC-5, IL-1β and IL-10) differ between people with and without periodontitis and whether smoking changes those levels.

More Smoking trials

Quick facts

Study typeObservational
Ages18 Years to 65 Years
SexAll
Enrollment116 (estimated)
SponsorUskudar University
Academic / other
Locations1 site (Istanbul)
StatusRecruiting
StartedDecember 23, 2025
Main results expectedJune 2026
Study endsJuly 2026
Registry record updatedJanuary 21, 2026
Trial IDNCT07312552 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are systemically healthy adults with at least 20 teeth who are clinically periodontally healthy or have periodontitis and who are either current smokers or non-smokers without recent antibiotics or periodontal treatment.

Probably not a fit

People with diabetes, rheumatoid arthritis, recent antibiotic or periodontal therapy, current medications that affect gingival health, pregnancy or lactation, heavy alcohol use, or fewer than 20 teeth are unlikely to qualify or benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study compares salivary inflammasome and cytokine levels across four groups: smokers with periodontitis, non-smokers with periodontitis, smokers without periodontitis, and non-smokers without periodontitis. Participants receive medical and dental history review, full intraoral and periodontal examinations according to the 2017 AAP/EFP classification, and unstimulated saliva collection prior to clinical measurements. Saliva samples are stored at −80°C and later analyzed by ELISA to quantify NLRP-3, NLRP-6, NLRP-12, NLRC-5, IL-1β and IL-10. The study aims to determine whether these salivary markers can serve as noninvasive diagnostic indicators of periodontitis and whether smoking modulates their associations with periodontal status.

Why it matters

Potential benefit: If successful, the findings could support simple saliva-based tests to help identify periodontitis and clarify how smoking affects oral inflammatory markers.

How similar studies have gone: Previous work has shown that salivary cytokines such as IL-1β can distinguish periodontal disease with modest accuracy, but measuring NLRP family inflammasome proteins in saliva is less established and remains exploratory.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* systemically healthy,
* clinical diagnosis of periodontitis,
* clinical diagnosis of periodontal health

Exclusion Criteria:

* history of regular use of systemic antibiotics, anti-inflammatory, or antioxidant drugs (previous 6 months);
* nonsurgical periodontal treatment (previous 6 months);
* surgical periodontal treatment (previous 12 months);
* presence of \<20 teeth;
* current medications affecting gingival health (calcium channel blockers, phenytoin, cyclosporine, and hormone replacement therapy);
* diabetes diagnosis; rheumatoid arthritis diagnosis; and pregnancy, lactating, or excessive alcohol consumption.

Where it's running

  • Uskudar University, Faculty of Dentistry
    Istanbul, Turkey (Türkiye)
    Recruiting

Study contacts

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.