Efficacy of the Disclosing Plaque Agent as a Guide to Remove the Oral Biofilm in Orthodontic Patients.

Inclusion Criteria: * Signed Informed Consent Form; * Male and female subjects, aged 18-75 years, inclusive; * Presence of orthodontic appliances; * Good general health (free of systemic diseases such as diabetes, HIV infection or genetic disorder, ongoing malignant disease of any type that could influence the outcome of the treatment and might interfere with the evaluation of the study objectives); * Generalized gingivitis; * Plaque index (PI) above 25%; * Availability for session of the study for an assigned subject; * Presence of all inferior and superior anterior teeth from canine to canine; * Smoking less than 10 cigarettes a day. Exclusion Criteria: * Chronic obstructive pulmonary disease and asthma; * Patients with periodontally disease defined as presence of PPD \>= 4mm and /or PAL of \>=3m; * Splinted teeth; * Presence of prosthesis; * Tumors or significant pathology of the soft or hard tissues of the oral cavity; * Current radiotherapy or chemotherapy; * Pregnant or lactating women; * History of allergy to Erythritol; * History of adverse reactions to lactose or fermented milk products; * Restorations on the teeth to be treated which may interfere with treatment administration and/or scoring procedures, at the discretion of the examiner; * Not willing to follow the agreed protocol.