基于酸的根运河密封剂散装或主要核心材料的应力分布的评估:有限元素分析研究研究
Ahlam Smran1,2, Mariam Abdullah1, Norasmatul Akma Ahmad1
1Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
PloS one
|March 14, 2024
概括
这项研究比较了BioRoot RCS和AH Plus密封剂在前根通道中的不同力量. AH Plus的应力更高,特别是斜力,而BioRoot RCS的性能受到填充技术的影响较小.
科学领域:
- 牙周内科医院 牙周内科医院 牙周内科医院
- 牙科材料科学 牙科材料科学
- 生物材料是一种生物材料.
背景情况:
- 根管堵塞技术显著影响牙结构内的应力分布.
- 在机械负荷下了解密封剂的行为对于预测长期临床成功至关重要.
研究的目的:
- 用BioRoot RCS或AH Plus密封器堵塞下第二前的压力分布进行比较.
- 评估Gutta-percha (GP) 存在和填充技术 (单形与散装填充) 对应力模式的影响.
- 评估垂直和斜力对应力分布的影响.
主要方法:
- 有限元分析 (FEA) 在下第二前的3D模型上进行.
- 创建了八个模拟场景,其中包括不同的密封器类型 (BioRoot RCS,AH Plus),核心材料 (仅GP或密封器),以及负载方向 (垂直或斜).
- 应用了200N的静态负荷来模拟闭塞力.
主要成果:
- 在使用AH Plus时,与BioRoot RCS相比,在根牙中观察到更高的von Mises应力.
- 与垂直负荷相比,斜负荷显著增加了牙中的应力水平.
- 对于BioRoot RCS,仅用密封剂取代GP并没有改变最大·米塞斯应力;核心材料的存在没有显著影响牙应力.
- 对于AH Plus,GP核心材料的存在降低了牙应力,而不是只有密封器的堵塞.
结论:
- 与AH Plus相比,BioRoot RCS表现出更有利的应力分布特征,特别是在斜加载条件下.
- 不管采用什么密封或堵塞技术,斜面的力会在牙根中产生更高的应力.
- 核心材料对应力分布的影响在BioRoot RCS和AH Plus密封器之间有所不同.
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