The prosthetic treatment of seriously damaged teeth after treated with endodontic often require an endodontic post as an additional retention element for core build-up prior to crown restoration. In addition to metal-based posts and zirconia-based ceramic posts, fiber reinforced composite (FRC) post system has become to be widely used in the restoration of endodontically treated teeth. A FRC post offers a number of advantages over a metal post due to its modulus of elasticity being closer to that of dentin and superior esthetic quality. Teeth restored with FRC posts show better resistance to fracture propagation than teeth restored with prefabricated or cast metal posts. Endodontically treated teeth reinforced with a prefabricated fiber post have shown lower incidences of root fracture.