The present study was a randomized, single-blind, controlled clinical trial. Randomization was performed by the lottery method, and patients were equally divided into two groups; the control group: (SRP only) and the test Group (PDT + SRP). Randomization process was done after the examiner was calibrated and before SRP. Clinical and microbial analysis was done at baseline and after 6 months.
Clinical parameters which were evaluated at baseline and 6-month follow-up were plaque index (PI),[23 (link)] bleeding on probing (BOP), PPD, and CAL. PPD was primary outcome variable and recorded using a University of North Carolina no. 15 periodontal probe (Hu-Friedy®) and a custom-made acrylic stent was used to standardize the measurement of site-specific PPD. CAL was calculated as the distance between the cementoenamel junction and base of the periodontal pocket. BOP was examined based on the presence or absence of bleeding after 30 s.[24 ] After examination, all the patients received through instrumentation of the root surface using both hand instruments (Gracey Curettes; Hu-Friedy) and ultrasonic device.
Clinical parameters which were evaluated at baseline and 6-month follow-up were plaque index (PI),[23 (link)] bleeding on probing (BOP), PPD, and CAL. PPD was primary outcome variable and recorded using a University of North Carolina no. 15 periodontal probe (Hu-Friedy®) and a custom-made acrylic stent was used to standardize the measurement of site-specific PPD. CAL was calculated as the distance between the cementoenamel junction and base of the periodontal pocket. BOP was examined based on the presence or absence of bleeding after 30 s.[24 ] After examination, all the patients received through instrumentation of the root surface using both hand instruments (Gracey Curettes; Hu-Friedy) and ultrasonic device.