不同的水泥-修复材料组合在全覆盖的在地修复中的影响:FEA研究
Andrea Baldi1, Alessandro Scattina2, Allegra Comba1
1Department of Surgical Sciences, Dental School Lingotto, University of Turin, Italy.
Dental materials : official publication of the Academy of Dental Materials
|September 23, 2025
概括
有限元素分析 (FEA) 显示,在间接粘合剂修复中,树脂矩阵陶会经历更高的应力,特别是在修复厚度降低的情况下. 水泥类型的影响最小,除了树脂矩阵陶,低收缩水泥的表现更好.
科学领域:
- 生物材料科学 生物材料科学
- 牙科材料 牙科材料
- 有限元素分析 (FEA)
背景情况:
- 间接粘合性修复 (IAR) 在现代牙科中对于恢复牙结构至关重要.
- 了解不同水泥材料组合的机械行为对于IAR的长寿至关重要.
- 有限元分析 (FEA) 为模拟复杂牙结构中的应力分布提供了一个强大的工具.
研究的目的:
- 为了评估使用FEA的间接粘合剂修复中的应力分布.
- 为了比较各种水泥材料组合在模拟的负荷下的性能.
- 分析修复材料类型和水泥性能对界面应力的影响.
主要方法:
- 从微型CT扫描创建了一个较低的第一个头覆盖层恢复的3D有限元素 (FE) 模型.
- 模拟涉及将轴向负荷应用于质,牙,修复材料和水泥的线性弹性模型.
- 分析的重点是切削应力和牙-水泥和水泥恢复接口的正常压力.
主要成果:
- 树脂矩阵陶修复表现出最高的应力,归因于修复曲,由减少的闭塞厚度和缺乏轴壁加剧.
- 玻璃矩阵和多晶陶修复显示压力水平较低.
- 水泥类型 (双固化树脂与光固化复合材料) 对应力影响较小,主要在树脂矩阵陶下注意到轻微差异.
结论:
- 树脂矩阵陶在覆盖恢复中容易受到更高的界面应力,受设计因素的影响.
- 水泥的选择似乎不如修复材料的选择那么关键,尽管低聚合缩水水泥对于树脂基质陶来说更好.
- FEA对于预测机械性能和指导间接粘合剂修复中的材料选择是有价值的.
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