Oral hygiene reinforcement in the simplified periodontal treatment of 1 hour.

Aim: To compare the clinical and microbiological outcome of the 1-h ultrasonic debridement of chronic periodontitis patients (CPP) with and without frequent sessions of oral hygiene reinforcement.

Methods: Clinical measurements and subgingival plaque were collected from 44 CPP at baseline, 3- and 6-months. The control group received a single session of 1-h full-mouth ultrasonic debridement, while oral hygiene instructions (OHI) were reiterated over four visits.