Assertion: autologous platelet | /r/AtLocation | complex fibrin matrix
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text: Platelet-rich fibrin (PRF) or leukocyte- and platelet-rich fibrin (L-PRF) is a second-generation PRP where autologous platelets and leukocytes are present in a complex fibrin matrix to accelerate the healing of soft and hard tissue and is used as a tissue-engineering scaffold for endodontics.