Platelet-rich fibrin (PRF) is made from centrifugation of blood. It provides lots of growth factors which aid in angiogenesis and proliferation and differentiation of stem cells and progenitor cells, playing a crucial role in the wound healing process. Thus, PRF can be used in periodontal defects by accelerating the healing of soft and hard tissue to gain the regeneration of the periodontium. As for extraction sockets, the application of PRF can reduce the post-operation discomfort and promote the soft tissue healing, helping to reduce the bone resorption resulting from the tooth removal. This review of studies investigating the cell biology of PRF and its application in periodontal regeneration and ridge preservation is able to provide clinicians in clinical practice with additional options and considerations.