Hyaluronic Acid and Octenidine Gel as an Adjunct to Non-surgical Periodontal Treatment

Inclusion Criteria: * Male or female aged 18 and above * Engaged patients presenting with a Full Mouth Plaque Score (FMPS) of ≤ 20% within the 6 weeks prior to enrolment, or exhibiting a ≥ 50% reduction in plaque score from the initial screening visit. * Periodontitis stage III/IV (grades A to C) with at least one site per quadrant with PPD ≥5mm, bleeding on probing and attachment loss ≥5mm * Willing to sign informed consent and comply with study procedures Exclusion Criteria: * Know hypersensitivity and/or allergy to any of the product's component (as per user leaflet) * Self-reported pregnancy or lactation * Smoking (current or in past 5 years), including e-cigarettes/vaping * Medical history including diabetes mellitus or other serious medical/ psychiatric conditions or transmittable diseases that according to the investigator may increase the risk associated with study participation * History of conditions requiring prophylactic antibiotic coverage prior to invasive dental procedures or/and systemic antibiotic therapy during the 3 months preceding the baseline evaluation * In chronic treatment with anti-inflammatory (including corticosteroids), anticoagulants/antiplatelets (including aspirin), immunosuppressants or other medication that can severely impact wound healing * History of alcohol or drug abuse * Subgingival professional mechanical plaque removal (excluding not-extensive subgingival debridement as judged by the examining clinician) and/or surgical periodontal…