“…Some studies demonstrate that PRF is a healing biomaterial with a great potential for bone and soft tissue regeneration, without inflammatory reactions, and can be used alone or in combination with bone grafts to promote hemostasis, bone growth, and maturation [341]. Moreover, it increases cell attachment and stimulates osteoblasts proliferation and differentiation [342]. A second generation of PRF was produced by Dohan et al introducing a method that concentrated most platelets and leukocytes from a blood harvest into a single autologous fibrin biomaterial [343].…”