Impact of post adhesion on stress distribution: an in silico study.

Restorative Dentistry & Endodontics Pub Date : 2025-05-01 Epub Date: 2025-05-21 DOI:10.5395/rde.2025.50.e19

Kkot-Byeol Bae, Jae-Yoon Choi, Young-Tae Cho, Bin-Na Lee, Hoon-Sang Chang, Yun-Chan Hwang, Won-Mann Oh, In-Nam Hwang

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Abstract

Objectives: This study aimed to evaluate the stress distribution in teeth restored with different post materials and bonding conditions using finite element analysis (FEA).

Methods: A two-dimensional FEA model of a maxillary central incisor restored with IPS-Empress-2 crown (Ivoclar Vivadent), composite resin core, and posts were created. The model simulated bonded and non-bonded conditions for both fiber-reinforced composite (FRC) and titanium (Ti) posts. Stress distribution was analyzed using ANSYS 14.0 software under a 100-N load applied at a 45° angle to the long axis of the tooth.

Results: The results revealed that stress concentration was significantly higher in non-bonded posts compared to bonded ones. FRC posts exhibited stress values closer to those of dentin, whereas Ti posts demonstrated higher stress concentration, particularly in non-bonded states, increasing the potential risk of damage to surrounding tissues.

Conclusions: FRC posts, with elastic properties similar to dentin and proper adhesion, minimize stress concentration and potential damage to surrounding tissues. Conversely, materials with higher elastic modulus like Ti, can cause unfavorable stress concentrations if not properly bonded, emphasizing the importance of post adhesion in tooth restoration.

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后粘接对应力分布的影响：一项硅片研究。

目的：应用有限元分析（FEA）评价不同桩体材料和粘结条件修复牙体的应力分布。方法：建立上颌中切牙牙冠（Ivoclar Vivadent）、复合树脂核、桩修复的二维有限元模型。该模型模拟了纤维增强复合材料（FRC）和钛（Ti）桩的粘结和非粘结状态。采用ANSYS 14.0软件对齿长轴以45°角施加100-N载荷时的应力分布进行分析。结果：结果表明，非粘结桩的应力集中程度明显高于粘结桩。FRC桩的应力值更接近于牙本质的应力值，而Ti桩的应力浓度更高，特别是在非键合状态下，增加了对周围组织损伤的潜在风险。结论：FRC桩具有与牙本质相似的弹性特性，粘连良好，可减少应力集中和对周围组织的潜在损伤。相反，弹性模量较高的材料，如Ti，如果粘接不当，会产生不利的应力集中，这就强调了后粘接在牙齿修复中的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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