title: Biomechanical Evaluation of a Tooth Restored with High Performance Polymer PEKK Post-Core System: A 3D Finite Element Analysis.
abstract: The aim of this study was to evaluate the biomechanical behavior and long-term safety of high performance polymer PEKK as an intraradicular dental post-core material through comparative finite element analysis (FEA) with other conventional post-core materials. A 3D FEA model of a maxillary central incisor was constructed. A cyclic loading force of 50 N was applied at an angle of 45° to the longitudinal axis of the tooth at the palatal surface of the crown. For comparison with traditionally used post-core materials, three materials (gold, fiberglass, and PEKK) were simulated to determine their post-core properties. PEKK, with a lower elastic modulus than root dentin, showed comparably high failure resistance and a more favorable stress distribution than conventional post-core material. However, the PEKK post-core system showed a higher probability of debonding and crown failure under long-term cyclic loading than the metal or fiberglass post-core systems.
authors.affiliation: Department of Prosthodontics, Korea University Guro Hospital, Seoul, Republic of Korea.
authors.forename: Ki-Sun
authors.identifier: 0000-0002-6933-3589
authors.initials: KS
authors.lastname: Lee
authors.affiliation: Department of Conservative Dentistry, Korea University Guro Hospital, Seoul, Republic of Korea.
authors.forename: Joo-Hee
authors.initials: JH
authors.lastname: Shin
authors.affiliation: Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
authors.forename: Jong-Eun
authors.initials: JE
authors.lastname: Kim
authors.affiliation: Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
authors.forename: Jee-Hwan
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Graduate School of Clinical Dentistry, Korea University, Seoul, Republic of Korea.
authors.forename: Won-Chang
authors.initials: WC
authors.lastname: Lee
authors.affiliation: Department of Prosthodontics, Korea University Guro Hospital, Seoul, Republic of Korea.
authors.forename: Sang-Wan
authors.initials: SW
authors.lastname: Shin
authors.affiliation: Department of Prosthodontics, Korea University Guro Hospital, Seoul, Republic of Korea.
authors.forename: Jeong-Yol
authors.identifier: 0000-0003-3079-0376
authors.initials: JY
authors.lastname: Lee
mesh_terms: D001577:Benzophenones; D003188:Composite Resins / Q000737:chemistry / Q000627:therapeutic use; D003442:Crowns; D003764:Dental Materials / Q000737:chemistry / Q000627:therapeutic use; D003799:Dental Stress Analysis; D020342:Finite Element Analysis; D005898:Glass / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D006801:Humans; D007180:Incisor / Q000187:drug effects / Q000473:pathology; D007659:Ketones / Q000737:chemistry* / Q000627:therapeutic use; D011092:Polyethylene Glycols / Q000737:chemistry* / Q000627:therapeutic use; D011108:Polymers / Q000737:chemistry* / Q000627:therapeutic use; D014092:Tooth Root / Q000187:drug effects* / Q000473:pathology
chemical_list: D001577:Benzophenones; D003188:Composite Resins; D003764:Dental Materials; D007659:Ketones; D011108:Polymers; C009753:fiberglass; C063834:polyetheretherketone; D011092:Polyethylene Glycols; D006046:Gold