Figure 4: Case 2: (a) preoperative clinical view; (b) a rectangular full-thickness flap reflection and visible defect after enucleation; (c) placement of PRF clot into the periapical defect; (d) PRF filled flat up to the brim of the defect; (e) sutures given with 4-0 silk suture material; (f) postoperative clinical view after 3 months showing soft tissue healing