Impact of a personalized video in oral hygiene motivation: The study hypothesis is that the use of a personalized oral hygiene video, made available to the patient via a cloud-based system, in conjunction with a text-based two-way recall system will increase patient compliance, hence leading to improvement or oral hygiene.

The strategy studied is composite:

• First, a personalized video of the patient's oral hygiene routine (toothbrushing and interdental hygiene) is recorded and made available to him-her via a cloud-based system. The patient is instructed to view it with his-her smartphone and/or tablet when brushing his-her teeth.
• Second, the patient is registered in a text-based recall system. This recall system will remind him-her the oral hygiene regimen suited to his-her personal situation and contains a link to his cloud-hosted video. 12 text messages for each patient will be sent over the course of the study (8 weeks). This is a two-way system as patients will be inquired about their compliance to oral hygiene. If the patient declare compliance, he-she will be congratulated (positive reinforcement). If the patient declares non-compliance, he-she will be informed he-she will be offered additional counselling at the next appointment.

Inclusion Criteria:

• 18 years old and older, having a good understanding of French language (read, write, speak, listen)
• With at least 20 teeth, including 4 first molars and 4 first or second premolars (4 interdental sites between premolars and molars)
• Patient attending an appointment in a centre participating to the trial
• Patient able to support treatment
• Patient affiliated to a health insurance scheme
• Patient giving his informed consent and accepting the modalities of the study
• Patient agreeing to attend up to 4 appointments dedicated to the study, during 8 weeks after the initial appointment (motivational interview)
• Patient in possession of an internet-enabled smartphone or tablet
• Patient has a personal e-mail address
• Patient agreeing to be registered within the system of text-based recalls for the duration of the study

Exclusion Criteria:

• Patient having previously benefited from a periodontal therapy (less than 1 year ago) or currently enrolled in a periodontal therapy program
• Patient having previously benefited from an oral hygiene motivation session less than 1 year ago
• Patient has had a calculus removal procedure less than 1 month ago
• Patient bears orthodontic appliances (any kind, for 1 or both arches)
• Patient bears removable dental prosthesis (any kind, for 1 or both arches)
• Patient allergic to benzoic acid preservatives (or thought to be)
• Patient has a high risk of infective endocarditis
• Patient benefiting from antiaggregant or anticoagulation therapy
• Patient is haemophilic
• Patient is unable to answer questions
• Patient is unable (from a cognitive or physical standpoint) to perform toothbrushing twice a day
• Patient is unable (from a cognitive or physical standpoint) to use interdental brushes and/or dental floss (at least once a day)
• Patient uses on a regular basis (more than once a week) interdental brushes and/or dental floss in addition to toothbrushing
• Patient under tutelage or guardianship
• Patient deaf or blind
• Non cooperative patient
• Patient will be changing geographical location (ie. moving away) during the duration of the study, hence compromising follow-up visits