Distribution of platelets, transforming growth factor-β1, platelet-derived growth factor-BB, vascular endothelial growth factor and matrix metalloprotease-9 in advanced platelet-rich fibrin and concentrated growth factor matrices.

Although these preparations do not allow accurate quantification, platelet counts and growth factor levels seemed higher and leukocytes were less activated in A-PRF. This may explain A-PRF's higher ability to release growth factors.