Clinical evaluation of a novel device for the treatment of periodontitis by applying a radical disinfection technique

INTERVENTION: Disinfection treatment using the novel device after conventional ultrasoud scaling and root plaining Periodontal pocket irrigation using water after conventional ultrasoud scaling and root plaining CONDITION: Periodontal disease PRIMARY OUTCOME: probing pocket depth, bleeding on probing, x‐ray examination INCLUSION CRITERIA: Patients who suffer from generalized chronic periodontitis with 2 or more teeth which have >=5mm periodontal pocket and show positive of bleeding on plobing. Patients who have 20 or more remaining teeth Patients who is systematically healthy