对不同材料的一体式骨柱和骨芯进行生物力学分析:高性能聚合物是一种选择吗?

Ayben Şentürk, Funda Akaltan, Özge Aydog, Burak Yilmaz
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引用次数: 0

摘要

目的:本有限元分析的目的是评估当使用不同弹性模量的材料制作2种不同设计的一体式桩核时,沿前磨牙根部牙本质、桩体和桩凝固剂的应力分布情况:使用软件获得下颌前磨牙一体式桩核修复体的两个三维虚拟模型(圆柱形和圆锥形桩设计)。共测试了八种桩核材料(聚醚醚酮(PEEK)、聚醚酮酮(PEKK)、玻璃纤维增强聚醚醚酮(GFR-PEEK)、碳纤维增强聚醚醚酮(CFR-PEEK)、金钯合金(Au-Pd)、钛(Ti)、氧化锆(Zi)和铬镍(Cr-Ni))。测定了柱体、柱体粘接剂和根部牙本质的最大主应力(MPS)。在与牙冠纵轴成 45° 斜角的舌唇面方向上对颊尖施加 150 N 的负荷:在两种牙柱设计中,使用铬镍材料的牙柱结构的 MPS 值最高。同样,弹性模量最高的铬-镍材料在牙本质中的 MPS 值也最高。然而,在牙根牙本质中,弹性模量最低的 PEEK 材料的 MPS 值最高:牙柱材料和设计影响了牙柱、牙柱粘接剂和根部牙本质的应力集中。聚合物材料根部牙本质的应力略高。在所有测试的桩核材料中,圆柱形设计的桩核在根部牙本质处的应力低于锥形设计的桩核。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Biomechanical Analysis of One-Piece Postand- Core: High-Performance Polymers vs Conventional Materials.

Purpose: To evaluate the stress distribution along a premolar's root dentin, its post, and its post-luting agent when materials with different elastic moduli are used to fabricate one-piece post-and-cores in two different designs.

Materials and methods: Two 3D virtual models (for cylindrical and conical post designs) of a mandibular premolar restored with one-piece post-and-core restorations were obtained using a software. A total of eight post-and-core materials were tested: polyetheretherketone (PEEK), polyetherketoneketone (PEKK), glass fiber-reinforced polyetheretherketone (GFR-PEEK), carbon fiber-reinforced polyetheretherketone (CFR-PEEK), gold-palladium alloy (Au-Pd), titanium (Ti), zirconia (Zi), and chromium-nickel (Cr-Ni). Maximum principals stress (MPS) in the post, post-luting agent, and root dentin were determined. A load of 150 N was applied to the buccal cusp in the linguo-labial direction at an angle of 45 degrees oblique to the longitudinal axis of the crown.

Results: The highest MPS value in post structure was observed with Cr-Ni material for both post designs. Similarly, the highest MPS value in the post-luting agent was observed for Cr-Ni, the material with the highest elastic modulus. However, in the root dentin, the highest value was observed in PEEK, the material with the lowest elastic modulus.

Conclusions: Post material and design influenced the stress concentration in the post, post-luting agent, and root dentin. The stress at the root dentin was slightly higher for polymeric materials. Cylindrical post design revealed lower stresses than conical post design at root dentin for all post-and-core materials tested.

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