Inclusion Criteria:  Aged 18 and above Generalized Stage II and Stage III periodontitis Subjects willing to receive NSPT necessary for the management of periodontitis and to comply with research appointments/schedule Use of a compatible Android cell phone with Oral-B 8.5.1 Application  Exclusion Criteria:  Edentulism Presence of any systemic disease that can alter the manifestation/outcome of periodontal treatment Pregnancy or intention to become pregnant at any point during the study duration Having received antibiotics within the previous 3 months Need for antibiotic prophylaxis in the context of dental treatment Having received professional periodontal treatment (other than supragingival cleaning) within the previous 12 months Presence of xerostomia interfering with saliva sampling Participation in another intervention trial Inability or unwillingness of individual to give written informed consent.