Investigation of the Interplay Between Local Oral Inflammation, Microbiota and Systemic Immune Responses.

An experimental gingivitis model will be used to explore changes in inflammation and the oral microbiome during gingivitis induction and resolution phases. Following consenting, screening, and enrollment, a dental intraoral (IO) scan or "digital impression" will be taken of the maxillary arch of each subject for the construction of an individual 3D printed tooth shield stent for use during the trial period. The customized stent (made of FDA approved resin material) will be used only on the experimental quadrant, and only during tooth brushing to prevent oral hygiene. Biological samples (blood, mucosal swabs, plaque biofilm, saliva, and gingival crevicular fluid) will be collected at each visit (pre-30 days, Baseline (Day 0), Day 3, Day 7, Day 14, Day 21, and Day 28. Plaque and gingivitis examinations will be taken at each visit.

Inclusion criteria

• Males and females, between 18-65 years of age;
• Availability for the duration of the study;
• ASA 1 Good general health (absence of any self-reported systemic disease or condition that, in the opinion of the Principal Investigator, might constitute a risk to the subject while participating in the study. Examples include heart problems, valve/hip replacements, etc);
• Willingness to provide information related to their medical history;
• Minimum of 20 uncrowned permanent natural teeth (excluding third molars and crowns);
• Informed Consent Form signed.

Exclusion criteria

• Subjects with more that 2 sites with pocket depth of > 4 mm and those presenting purulent exudate, tooth mobility, and/or extensive loss of periodontal attachment or alveolar bone;
• Oral pathology or a history of allergy to testing products;
• Subject using anticonvulsants, antihistamines, antidepressants, sedatives, tranquilizers, anti-inflammatory medication or daily analgesics within one month prior to the start of the study or scheduled to start such intake during the course of the study; to be defined by the dental examiner;
• Subject participating in any other clinical study;
• Subject pregnant or breastfeeding;
• Subject allergic to oral care products and personal care consumer products
• Extended use of antibiotics or therapeutic mouthwash (eg: Chlorhexidine) any time during the three months prior to entry into the study;
• Ongoing use of medications known to affect the gingival tissues (i.e. calcium channel blockers, phenytoin, cyclosporine)
• Current smokers (or users of tobacco and vaping products) and subjects with a history of alcohol or drug abuse;
• An existing medical condition which prohibits eating or drinking for periods up to 4 hours.
• Individuals with orthodontic bands or removable partial dentures.
• Dental prophylaxis in the previous 3 months prior to the baseline examination