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BioMed Research International
Volume 2017 (2017), Article ID 1373127, 9 pages
Research Article

Biomechanical Evaluation of a Tooth Restored with High Performance Polymer PEKK Post-Core System: A 3D Finite Element Analysis

1Department of Prosthodontics, Korea University Guro Hospital, Seoul, Republic of Korea
2Department of Conservative Dentistry, Korea University Guro Hospital, Seoul, Republic of Korea
3Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
4Graduate School of Clinical Dentistry, Korea University, Seoul, Republic of Korea

Correspondence should be addressed to Jeong-Yol Lee

Received 11 January 2017; Accepted 5 March 2017; Published 12 March 2017

Academic Editor: Andrea Scribante

Copyright © 2017 Ki-Sun Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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.