BioMed Research International · 2017 · 84 citations · 35 references
DentistryDental Materials ScienceDental MaterialsMechanical Properties Of Dental MaterialsProsthodontic MaterialsBiomaterials For Oral RegenerationCrown MaterialsDental CompositesDental PolymersDenture Base MaterialsMaterials For Maxillofacial ProsthesesBiomechanical LoadingBiomechanical MechanismsBiomechanics Of Core RestorationsCrown Failure RiskElastic ModulusHigh-performance Polymer CompositesStress DistributionStress Distribution In Restorations
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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