Usage Test on a New Cosmetic Product: Mouthwash

Inclusion Criteria: * Person (man, woman) aged 18 or over, * Person with a gingival index ≥ 2 (according to Loë \& Silness) on at least 10% of teeth (i.e. 3 teeth) at the inclusion visit * Person capable of following the instructions for using the product, * Person agreeing to come for a dental consultation 7 days (+/- 1 day) after the inclusion visit, * Volunteer informed and having signed their informed consent form, * Volunteer person affiliated to a social security scheme (Art L1121-11 of the CSP). Exclusion Criteria: * Person who has regularly used mouthwash in the last month, * Person suffering from periodontitis * Person having a scaling treatment planned in the session, or having had a scaling treatment in the 6 months preceding the inclusion visit, * Person having had antibiotic or antifungal treatment in the 3 months preceding the visit, * Person taking anti-coagulant or anti-aggregant or immunosuppressive or anti-cancer treatment (chemotherapy or radiotherapy of the head and neck) * Person at risk of infective endocarditis, * Person with a known sensitivity or allergy to one of the components of mouthwashes, including components derived from essential oils (Eucalyptol, thymol, menthol, limonene). * Volunteer participating in intervention research. * Vulnerable people referred to in articles L. 1121-5 to 8 and L. 1122-1-2 of the Public Health Code (institutionalized volunteers, deprived of their liberty or placed under legal protection (guardianship or curatorship).