Clinical evaluation of local administration of injectable PRF (injectable platelet-rich fibrin) in periodontal pockets as adjunctive therapy to scaling and root planing. 15 periodontal patients will receive a through traditional mechanical treatment (scaling and root planing). Each patient will receive subgingival i-PRF injected in half mouth and the opposite side will be injected with saline, immediately after the deep scaling session.

The aim of the study is to evaluate the efficacy of i-PRF subgingival injection right after scaling and root planing as adjunctive therapy to traditional mechanical therapy. 15 periodontal patients will receive traditional mechanical supra and subgingival scaling and root planing. I-PRF will be applied subgingivally in the deep pockets in a half mouth design. The injected half mouth (study group) for each patient will be allocated randomly. The opposite side will be injected with saline (control group). Clinical parameters will be evaluated: plaque index (PI), bleeding on probing (BOP), probing depth (PD), clinical attachment level (CAL). Clinical measurements will be performed at baseline and at 8 weeks.

Inclusion Criteria:

• Patients are in general good health.
• Patients are from both gender and are adult.
• A sign informed consent from participation and permission to use obtained data for research purposes.
• They have not taken medication known to interfere with periodontal tissue health or healing in the preceding 6 months.
• Presence of bilateral periodontal pockets (≥5 mm) on the minimum of 2 teeth in each side.

Exclusion Criteria:

• Patients less than 18 years' old
• Immunosuppressive systemic diseases (like cancer, AIDS, diabetes…)
• clotting and Hematological disorders
• Medications influence on the gingival and periodontal tissues (like calcium channel blockers, or Long-term steroid use
• The teeth with poor bad filling and poorly fitted restorations