树脂复合材料修复的线性和体积收缩位移,带有和没有解
Siti Mariam Ab Ghani1, Mohamed Ibrahim Abu Hassan1, Abdul Halim Abdullah2
1Center for Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA.
Dental materials journal
|August 23, 2023
概括
这项研究比较了树脂复合材料修复 (RCRs),发现部分解的RCRs的收缩位移几乎是完全结合的RCRs的一半. 这种差异为解锁的修复特性提供了洞察力.
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
- 恢复性牙科 恢复性牙科
背景情况:
- 树脂复合修复 (RCRs) 在牙科中被广泛使用.
- 了解聚合收缩及其位移效应对于RCR长寿至关重要.
- 接口上的绑定状态显著影响RCR性能.
研究的目的:
- 为了比较完全结合与部分解结合的I类树脂复合材料修复的收缩位移.
- 通过理论预测和有限元素分析 (FEA) 来验证实验发现.
主要方法:
- 准备了两组I类RCRs (n=5):完全绑定 (G1) 和在地板上解除绑定 (G2).
- 线性表面位移 (LSD) 和体积表面位移 (VSD) 被实验测量.
- 结果与简单理论和FEA的预测进行了比较.
主要成果:
- 实验性LSD:G1=62.5±5.2μm,G2=32.8±4.0μm. 这两种测试的结果是:
- 实验性VSD:G1 = 1.22±0.2mm3,G2 = 0.63±0.2mm3. 试验过程中使用的VSD值为:G1 = 1.22±0.2mm3,G2 = 0.63±0.2mm3.
- 在每个组中,实验,理论和FEA结果之间没有发现显著差异 (p>0.05).
- 在G1和G2之间观察到显著差异 (p<0.05),G2值大约是G1.0的一半.
结论:
- 部分解接可以显著减少RCR中的收缩位移.
- FEA和简单理论准确地预测了实验收缩位移.
- 这些发现提供了对解约修复的行为和特征的宝贵见解.
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