The primary aim of the study is to evaluate the efficacy of either fibre retention osseous resective surgery (FibReORS) or conservative surgery with or without PPT in the treatment of deep residual pockets ≥ 6 mm in stage III-IV periodontitis patients after cause related therapy (step II) in terms of endpoints of therapy and other secondary outcomes at different time intervals (1, 3 and 5 years). Moreover, the study aims to evaluate the stability of the results obtained for the different surgical approaches over a 5 years follow-up period.
Diagnosis of stage III/IV periodontitis.
Completed steps I-II periodontal therapy at least 6 weeks before.
Full Mouth Plaque Score less than 15% at re-evaluation.
Full Mouth Bleeding Score less than 15% at re-evaluation.
Compromised general health which contraindicates the study procedures (ASA III-VI patients).
Systemic diseases/medications which could influence the outcome of the therapy (e.g. uncontrolled diabetes mellitus, non-plaque-induced gingival diseases, antiepileptic drugs (phenytoin and sodium valproate), certain calcium channel-blocking drugs (e.g., nifedipine, verapamil, diltiazem, amlodipine, felodipine), immunoregulating drugs (e.g., ciclosporine), and high-dose oral contraceptives).
Pregnant or nursing women.
Presence of tooth mobility ≥ class 2.