Abstract: Periodontitis is a chronic infectious disease in which plaque is the main pathogenic factor. Plaque control and elimination of infection is the primary goal of the treatment for periodontitis. On the basis of plaque control, we could achieve the goal of recovering periodontal tissue function, recovering the physiological morphology of periodontal tissues, and maintaining long-term efficacy to prevent recurrence, so that periodontal tissues remain healthy. This article reported a case of stage III and grade B periodontitis, in which the patient receiving guided biofilm therapy. Guided tissue regeneration combined with bone grafting is performed on residual deep periodontal pockets after controlling of inflammation. Ultimately the patient is satisfied with the results after regular periodontal maintenance.

Key words: periodontitis, guided biofilm therapy, supportive periodontal therapy