in 10 patients, twenty sites in subjects with, localized aggressive periodontitis, with CAL ≥ 5 will be included in the present study. Sites will be allocated randomly to be surgically treated with, Nigella Sativa oil extract Mixed with xenograft or xenograft alone. At baseline, 3, 6 after surgery, the following clinical parameters (PD, CAL, BOP) and CBCT at baseline and 6 months x-ray will be recorded.
The aim of this study will be to evaluate, clinically, and radiographically the effect of Nigella Sativa oil extract Mixed with xenograft versus xenograft alone in the treatment of intra-bony defects in patients with aggressive periodontitis.