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首页> 美国卫生研究院文献>BioMed Research International >Biomechanical Evaluation of a Tooth Restored with High Performance Polymer PEKK Post-Core System: A 3D Finite Element Analysis
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Biomechanical Evaluation of a Tooth Restored with High Performance Polymer PEKK Post-Core System: A 3D Finite Element Analysis

机译：高性能聚合物PEKK后核系统修复牙齿的生物力学评估：3D有限元分析

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摘要

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.
机译：本研究的目的是通过与其他常规后核材料进行比较有限元分析（FEA），评估高性能聚合物PEKK作为放射状牙科后核材料的生物力学行为和长期安全性。构建了上颌中切牙的3D FEA模型。在牙冠的surface表面以与牙齿的纵轴成45°角的角度施加50 N的循环加载力。为了与传统使用的后芯材料进行比较，对三种材料（金，玻璃纤维和PEKK）进行了模拟，以确定它们的后芯特性。 PEKK的弹性模量低于牙本质牙本质，与传统的后核材料相比，具有较高的抗故障能力和更有利的应力分布。但是，与金属或玻璃纤维后核心系统相比，PEKK后核心系统在长期循环载荷下显示出更高的脱粘和胎冠破坏可能性。

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