Efficacy of PRF Application on Clinical Parameters and GCF Platelet-derived Growth Factor-BB and Periostin Levels

"1. Intravenous blood (obtained by venipuncture of the antecubital vein) will be collected in two 10-mL sterile tubes without any anticoagulants and will be immediately centrifuged at 3,000 revolutions (400 × g) per minute for 10 minutes.~2. A structured fibrin clot in the middle of the tube, just between the red corpuscles (RBCs) at the bottom and the acellular plasma at the top, will be separated from the RBCs using sterile tweezers and scissors and transferred on a sterile PRF box.~3. The PRF will be then brought to a thickness of 1 mm by gently compressing in PRF box. Standardized PRF pieces will be obtained by measuring by a periodontal probe and cutting into 3 × 5 mm dimensions.~4. The PRF pieces will be inserted into the periodontal pockets by filling the pockets from the base up to the gingival margin. A modified gingivectomy knife, of which the tip is made blunt, will be used.~The PRF volume will be calculated by recording how many pieces will be inserted."