Amira Ragheb, Mona Salah El Din Darhous, Mahmoud Ibrahim El-Refaie, Hanaa M. Elshenawy, Faten Baioumy And Amany Mohy Eldin,

ABSTRACT
Background Laser With Various Wavelength Was Used As An Alternative Treatment To Conventional Periodontal Therapy. The Diode Laser Has Bactericidal And Detoxifying Effect In Periodontal Therapy By Suppressing The Invasive Bacterium Associated With Aggressive Periodontal Disease That Cannot Be Treated With Conventional Scaling And Root Planning (SRP). Objective: This Study Carried Out To Evaluate The Effect Of 970 Nm Diode Soft Tissue Laser On Periodontopathic Bacteria In Patients With Chronic Periodontitis. Subjects And Methods: The Study Carried Out On Twenty Patients Collecting From The (GCF) Into Tubes. Tubes Divided Into Two Groups The First Group Exposed To 970nm With Power 2w With Time Intervals 30 Seconds And 60 Seconds, While The Second Group Was Exposed To 970nm With Power 2.5w With Time Intervals 30 Seconds And 60 Seconds. The Clinical Parameters Were Recorded To Detect The Periodontal Health For Each Patient.

Results: No Difference In Absorbance Unit When Power Is Changed But The Difference Was In The Time Application. The Group Of 2.5w In 60 Seconds Showed Best Antimicrobial Situation. Conclusion: The 970nm Diode Laser With Proper Power And Time Could Be Used As An Adjunctive Treatment With Mechanical Debridement Of Subgingival Pathogenic Microorganisms.