This randomized clinical trial aims to compare the clinical and radiographic outcomes of the Vector®️ ultrasonic system and mini-five curettes in non-surgical periodontal therapy. Patients diagnosed with periodontitis will be randomly assigned to either ultrasonic instrumentation or manual instrumentation. Clinical periodontal parameters and radiographic bone level changes will be evaluated at baseline, 1, 3, 6, and 12 months. The primary objective is to assess differences in clinical attachment level and probing depth reduction between the two treatment modalities.