Application of advanced platelet-rich fibrin for through-and-through bony defect during endodontic surgery: Three case reports and review of the literature

Table 1 Brief description of the three mentioned cases

Tooth No.	Endodontic diagnosis	Coronal coverage	Periapical index using CBCT 47 (before surgery)	Periapical index using CBCT 47 (four months recall)
#15	Previously treated, symptomatic apical periodontitis	Fiber post and composite core build-up	5 + D: Cortical bone destruction	0: Intact periapical bone structure
#25	Previously treated, symptomatic apical periodontitis	PFM crown	4 + E: Cortical bone expansion	0: Intact periapical bone structure
#12	Previously treated, asymptomatic apical periodontitis	Metallic post and ceramic crown	5 + D: Cortical bone destruction	0: Intact periapical bone structure

The table shows a brief description of the three mentioned cases that include: The endodontic diagnosis, the coronal coverage, and the periapical index before the surgery and in 4 mo recall after the surgery. CBCT: Computed tomography; PFM: Porcelain fused to metal.