Polyetheretherketone (PEEK) is a polymer from group polyaryletherketone. It is a relatively new family of high–temperature thermoplastic polymers, consisting of an aromatic backbone molecular chain, interconnected by ketone and ether functional groups. In medicine, PEEK has been demonstrated to be an excellent substitute for titanium in orthopedic applications and has been used in prosthetic dentistry as implant, provisional abutment, implant supported bar or clamp material in the field of removable dental prostheses. The purpose of this present review were to investigate the scientific data related to polyether ether ketone (PEEK) and its applications in prosthodontics