Inclusion Criteria:  Patients  consulting the Dental Care Service of the university hospital of Reims presenting gingivitis or periodontal diseases according to the international classification of periodontal diseases (Chicago, 2017) presenting at least 10 pairs of opposing teeth able to perform oral hygiene procedures speaking French who signed the informed consent form affiliated to the French Social Security system  Non-inclusion criteria :  Patients presenting :  a medical history likely to compromise protocol (psychiatric disorders, medical or pharmacological antecedents altering or modifying immune response in last 3 months) pregnancy or breastfeeding eating disorders orthodontic treatments patients under legal protection, trusteeship or guardianship unable to understand auto-questionary  Exclusion criteria :  Patients presenting :  presenting exacerbations signs of periodontal diseases benefiting a professional plaque removal procedure outside of the experimental procedure