Abstract: Chronic periodontitis is an infectious disease caused by periodontal pathogens resulting in progressive loss of periodontal tissues and the alveolar bone. Mechanical method of removing dental plaque is one of the most effective methods for the treatment of periodontal disease. However, conventional therapy does not completely remove periodontal pathogens, especially the sites where conventional mechanical instrumentation cannot reach. In recent years, many researchers have studied the effect of laser in periodontal treatment. The following is the review about the application of laser irradiation in periodontal non-surgical treatment.

Key words: Periodontitis, Laser , Periodontal therapy