Abstract: Objective: To investigate the clinical effectiveness of platelet rich-fibrin (PRF) on immediate implantation in the fresh extraction sites of posterior teeth. Methods: After posterior tooth was extracted, one implant was placed into the fresh extraction site. The PRF clot as grafting materials was packed into the space between the implant and the fresh extraction site to regenerate the bone and periodontal tissue. Results: The radiograph demonstrated that the space around the implant was filled with a dense bone-like tissue. The width of keratinized tissue was greater than 2mm. Conclusion: PRF could serve as a viable material for tissue regeneration around immediately placed implant in the posterior region.

Key words: Platelet rich-fibrin, Immediate implantation, Bone defect, Soft tissue defect