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KMID : 0613420180270020075
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Journal of the Korean Academy of Esthetic Dentistry
2018 Volume.27 No. 2 p.75 ~ p.81
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A Preliminary study of Biomechanical Behavior of High-Performance Polymer Post-Core System
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Lee Ki-Sun
Kim Jong-Eun
Kim Jee-Hwan
Lee Jeong-Yol
Kim Sang-Wan
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Abstract
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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.
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KEYWORD
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high performance polymer , post-core material , Finite Element Analysis
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