Clinical and radiographic examination
PD, bleeding
BLEEDING, PLAQUE
At baseline and follow-ups, an experienced, masked, calibrated examiner (R. G.) performed a comprehensive periodontal examination of all patients using a manual Williams probe (POW6, Hu-Friedy, Chicago, Illinois, USA). At 6 sites of each tooth, the following periodontal parameters were measured: absence/presence of plaque on tooth surfaces using a dichotomous plaque index, absence/presence of bleeding upon gentle probing around the gingival crevice, probing pocket depth (PD), gingival recession (REC), and absence/presence of BOP provoked by gentle applying of a probe to the bottom of a sulcus/pocket. The percentage of plaque-positive sites was expressed as FMPS [