按压力减轻直接复合概念使用不同的技术恢复的I类腔中的压力分布模式:有限元分析:
Seyedeh Maryam Tavangar1, Reza Tayefeh Davalloo1, Farideh Darabi1
1Department of Restorative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.
International journal of dentistry
|June 12, 2025
概括
在直接复合材料修复中,聚乙烯纤维增强显著降低了I类空洞中粘合剂和混合层的应力. 这种技术与散装复合材料一起,与传统方法相比,提供了更均的应力分布.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程 生物材料工程
- 计算力学 计算力学 计算力学
背景情况:
- 一级牙是普遍存在的牙科修复.
- 直接复合材料修复容易受到聚合和功能过程中压力积累的影响.
- 减压直接复合材料 (SRDC) 概念旨在减轻这些压力.
研究的目的:
- 为了比较使用有限元素分析 (FEA) 的不同技术恢复的I类腔中的应力分布.
- 评估聚乙烯纤维,散装复合材料和自愈复合材料作为减压层的有效性.
主要方法:
- 采用FEA的方法是使用一个带有I类腔的上的三维模型.
- 模拟了四个修复组:传统的微混合复合材料,散装复合材料,带底聚乙烯纤维的微混合复合材料和带底自愈复合材料的微混合复合材料.
- 在树脂聚合过程中和在600N负荷下分析了应力分布和总变形.
主要成果:
- 在质-牙-质结点和边缘山脊处的最大应力值在各组中是相似的.
- 传统的微混合复合材料组 (A组) 对混合和粘合层的应力最高,总变形最大.
- 使用聚乙烯纤维 (C组) 和散装复合材料 (B组) 的组在空腔地板上表现出更均的应力分布.
结论:
- 在微混合复合材料下面用聚乙烯纤维加强直接复合材料的修复,有效地减少了粘合剂/混合层的应力,并最大限度地减少了总变形.
- 与传统的微混合复合材料相比,批量填充和自我固化复合材料也提供了减压的好处.
- 聚乙烯纤维和散装复合材料提高了I类修复中应力分布的均性.
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