b) Objectively achieved oral cleanliness – dental plaque
PLAQUE, PLAQUE, DENTAL PLAQUE
An experienced dentist (D3) instructed and calibrated the examining dentists (TS, D2) prior to the study until at least 90% of the scores assessed by both examiners corresponded in five subsequent subjects (not involved in the present study) and the remaining deviated by no more than one. Dental plaque was assessed twice (before and immediately after brushing). Prior to each plaque assessment, dentists dried the teeth with an air stream and applied a plaque disclosing agent (Mira-2-Ton; Hager & Werken, Duisburg, Germany). Then, they assessed the MPI (Marginal Plaque Index, [