IFI16 is a Periodontitis Modulating Protein (IFI)

  • End date
    Jun 10, 2023
  • participants needed
  • sponsor
    University of North Carolina, Chapel Hill
Updated on 10 May 2022
Accepts healthy volunteers


To characterize the expression of IFI16 and AIM2 in gingival tissues in an inflammatory response using an acrylic mouthguard (also referred to as a stent) induced bacteria overgrowth method.

Participants: A maximum of 72 Adult subjects will be recruited from the patients, students and staff at the University of North Carolina, as well as the general population in or near Chapel Hill NC.

Procedures (methods):

Medical history, demographics, (height/weight), urine based pregnancy test, vital signs (to include blood pressures, and pulse) standard dental clinical measures (to include plaque index, gingival index, bleeding on probing, and clinical attachment level), alginate impressions taken for fabrication of an acrylic stent (mouthguard), 2 gingival biopsies, 2 subgingival (below the gumline) plaque samples, and Scaling Root planing (SRP)/or adult prophylaxis


A total of 72 subjects will be enrolled. Specifically, a sufficient number of adults 18 years and older will be screened until 36 healthy (PPC-A) subjects and 36 subjects with severe periodontal disease (PPC-G) will be enrolled. Eligibility for study participation will be determined during the screening session. Barring dropout, subject participation will include 1 to 8 visits lasting over a maximum period of 42 days. The last 3 visits (visit 5-8) will depend on the individual need of the subject for providing SRP. Clinical data and medical history data will be collected at the screening visit to ascertain eligibility. All subjects will have dental plaque and a gingival biopsy collected at baseline. Enrolled subjects will be included in an experimental gingivitis model Stent-Induced Biofilm Overgrowth (SIBO) for 21 days. Individuals will return for safety checks every week during the 21-day period. At 21-days, plaque samples and a gingival biopsy will be collected. For diseased individuals SRP will initiate during the 21-day visit at the SIBO quadrant. Visit 6 (28 days) will include the post-biopsy follow up, prophylaxis (for healthy individuals) and SRP (diseased individuals). Subjects receiving SRP may have 2 additional visits (visit 7 at day 35 and visit 8 at day 42) for completing the SRP of all quadrants and will be dependent on individual need. Medical histories, demographics, height and weight, clinical and biological data described above will be recorded and stored on a secure server located at the University of North Carolina. Each participant enrolled into the study will have a unique identification number that has been stripped of any information that could be used by non-study members to identify the subject.

Condition Severe Periodontitis, Acute Inflammatory Response
Treatment Customized acrylic mouthguard
Clinical Study IdentifierNCT03513497
SponsorUniversity of North Carolina, Chapel Hill
Last Modified on10 May 2022


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Inclusion Criteria

Subjects must have read, understood and signed an informed consent form
Subjects must be able and willing to follow study procedures and instructions
Subjects must be adult males or females with a minimum of 18 years (inclusive)
Subjects must present with at least 20 teeth in the functional dentition, excluding third molars
Subjects must have at least 3 teeth in each posterior sextant
Subjects must be in good general health
Subjects must be in the healthy (PPC-A) or severe periodontitis (PPC-G) categories according to the PPC (1)

Exclusion Criteria

If the sextants identified for the analysis has implants
All individuals who meet criteria for anti-infective prophylaxis prior to dental procedures
Chronic disease with oral manifestations including diabetes mellitus
Current smoker or one that has stopped smoking less than 2 years prior to enrollment
Gross oral pathology other than the periodontal disease
Treatment with antibiotics for any medical or dental condition within 1 month prior to the screening examination
Chronic treatment (i.e., two weeks or more) with any medication known to affect periodontal status (e.g., phenytoin, calcium antagonists, cyclosporin, coumadin, non-steroidal anti-inflammatory drugs, aspirin) within one month of the screening examination
Ongoing medications initiated less than three months prior to enrollment (i.e., medications for chronic medical conditions must be initiated at least three months prior to enrollment)
Significant organ disease including impaired renal function, heart murmur, history of rheumatic fever or valvular disease, or any bleeding disorder
Individuals with prosthetic material used for intra-cardiac repair (e.g. for congenital heart disease), or intra-cardiac devices, cardiac transplant, infective endocarditis and individuals who have had previous infectious complications of prosthetic joint infections
Infectious diseases such as hepatitis, HIV or tuberculosis
Anemia or other blood dyscrasias
Anticoagulant therapy or drugs, such as heparin or warfarin
Severe unrestored caries, or any condition that is likely to require antibiotic treatment over the trial
Pregnant, or expect to become pregnant within the next several months
Females of child-bearing capacity must be willing to have pregnancy test to confirm they are not pregnant
Females of child-bearing capacity not using any form of contraceptive methods
Anything that would place the individual at increased risk or preclude the individual's full compliance with or completion of the study
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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