Periodontitis is an infection of the ligament and bone supporting the tooth and is caused by the presence of periodontopathogenic species in a susceptible host, affecting 5% to 20% of the adult population in a clinically significant manner. Periodontal therapy is based on supra- and sub-gingival disinfection concomitant with the establishment of an environment that is less favorable for periodontopathogenic growth. Though the adequacy of mechanical debridement (scaling and root planing) in the treatment of periodontitis has been well acknowledged. Chemo-mechanical concept has been developed...