Clinical trial Recruiting at 1 site Observational Ages 21 to 75

How Smoking Affects Immune Responses Around Dental Implants

Official title: Impact of Smoking on Th1/Th2-M1/M2 Cytokine Balance and B-Cell Immune Responses in Peri-Implant Health and Disease

Run by Gazi University · NCT07750171 · Data updated 2026-11-12

This study tests how smoking changes the body's immune response around dental implants in people with healthy implants, peri-implant mucositis, or peri-implantitis.

Quick facts

Study typeObservational
Ages21 Years to 75 Years
SexAll
Enrollment216 (estimated)
SponsorGazi University
Academic / other
Drugs / interventionsradiation
Locations1 site (Ankara, Ankara)
StatusRecruiting
StartedJune 1, 2026
Main results expectedOctober 1, 2026
Study endsDecember 1, 2026
Registry record updatedSeptember 17, 2026
Trial IDNCT07750171 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults with at least one functional dental implant and a diagnosis of healthy peri-implant tissue, peri-implant mucositis, or initial peri-implantitis (PD 6–7 mm).

Probably not a fit

Some participants may not directly benefit if biomarkers do not translate into clinical tools or if no differences are found between smokers and non-smokers.

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 smokers and non-smokers who have at least one functioning dental implant and either healthy tissue, peri-implant mucositis, or peri-implantitis. Researchers will collect fluid samples around implants to measure inflammatory and immune-related proteins to understand smoking’s impact on the local response. The goal is to identify biological markers that may help gauge disease risk and severity in the peri-implant space. No interventions are described; the study focuses on observing existing conditions and immune factors. Participants must meet specific criteria and avoid recent periodontal therapies or systemic illnesses that could affect results.

Why it matters

Potential benefit: If successful, the findings could improve understanding of smoking-related risks and help identify biomarkers to assess peri-implant disease severity.

How similar studies have gone: Previous research has linked smoking to worsened peri-implant outcomes, supporting the exploration of immune markers in this area.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* willingness to participate in the study;
* having at least one dental implant that has been in function for at least one year;
* having an implant diagnosed with peri-implant health, peri-implant mucositis, or initial peri-implantitis according to the study definitions; for the initial peri-implantitis group, having an implant with PD of 6-7 mm.

Exclusion Criteria:

* having received periodontal therapy, oral decontamination treatment, antibiotics, or steroids within the last six months before study initiation;
* being pregnant or breastfeeding;
* having rheumatoid arthritis, lupus erythematosus, or poorly controlled systemic diseases such as diabetes or hypertension;
* having a history of radiation therapy or cancer therapy.

Where it's running

  • Gazi University
    Ankara, Ankara, Turkey (Türkiye)
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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  • Vitamin D and LL-37 Levels in Peri-Implant Fluids

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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.