Effect of Mouthrinsing on Inflammation of the Gums.

Inclusion Criteria: * Healthy male and female adults aged ≥18 years. * Participants who have gingivitis/mild chronic periodontitis (approximal probing depth ≤ 3.5 mm at ≥ 80 % of the sites and at ≤ 20 % of the sites \> 3.5 mm and \< 5 mm). * Participants must have read, understood and signed the informed consent form. * Participants who have a GI ≥ 1.3 at baseline. * Participants who have at least 20 own teeth excluding the wisdom teeth (incl. 16 natural crowns). * Participants who have an acceptable compliance according to the investigators' assessment. Exclusion Criteria: * Participants who have systemic diseases that require regular systemic medication intake that may affect the gingival condition (e. g. phenytoin, nifedipine, cyclosporine, antibiotics, steroids, antiphlogistics). * Participants who require antibiotic treatments for dental appointments (endocarditis prophylaxis). * Participants who were treated with antibiotics 8 weeks before recruitment and during the course of the study. * Participants who were treated with any antibacterial mouthrinse 6 weeks before recruitment. * Participants who use other than the recommended mouthrinse or toothpaste during the study period. * Participants who have moderate and severe chronic or aggressive periodontitis. * Participants who have irregularities of the gingival tissues, e. g. hyperplastic gingiva, mucosal diseases. * Participants who have rampant caries. * Participants under guardianship or without freedom by administrative or legal award. * Known hypersensitivity or allergy to the study product and standard toothpaste ingredients used in the present study. * Known pregnancy or breast feeding during the course of the study. * Participation in another clinical trial or receipt of an investigational compound/treatment at the same time and 4 weeks prior to inclusion.