BACKGROUND : P eriodontal therapy aim s to eliminat e the etiological factorswhich play s a primary role in the initiation and progression of disease. Photodynamic therapy is an advanced technique which involves three components; photosensitizer agent (Indocyanine green dye), source of light (LASER) and oxygen. AIM: To compare the efficacy of surgical periodontal therapy with PDT versus surg ical periodontal therapy alone. MATERIALS AND METHODS: 5 participants with Stage II or III, with Grade B or C periodontitis with PPD ≥5 mm on mandibular anterior teeth, were randomly assigned to surgical periodontal therapy (Group 1) and photodynamic the rapy assisted surg ery (Group PI , GI , PPD, and CAL were measured using UNC 15 probe at baseline and 3months. RESULTS: The intra group comparison of all the clinical parameters between 2 study groups were found to be non significant. Only the intra g roup comparison of mean GI scores were found to be statistically significant in PTAS group. The inter g p comparison of all the clinical parameters at baseline and after 3 months were found to be significant for PTAS group. CONCLUSION: The adjunctive use of PDT to surgical periodontal treatment is a clinical option for significant improvement in clinical parameters in periodontitis cases.