基于溶剂储存的散装填充树脂复合材料的表面和散装粘弹性稳定性
Halah Thanoon1, Nikolaos Silikas2, David C Watts3
1Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester, UK; Department of Restorative Dentistry, College of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.
溶剂储存会对基于树脂的复合材料 (RBC) 的硬度产生负面影响,并增加批量爬行. 快速固化散装填充RBC的稳定性与传统的稳定性相比,在具有挑战性的环境中表现相似.
科学领域:
- 牙科材料科学 牙科材料科学
- 聚合物化学 聚合物化学
- 生物材料工程 生物材料工程
背景情况:
- 大量填充树脂基复合材料 (RBC) 广泛用于牙科修复.
- 了解它们在各种存储条件下的长期稳定性,对于临床成功至关重要.
- 暴露于溶剂可能会影响牙科材料的物理和机械性能.
研究的目的:
- 为了评估溶剂储存对快速光固化散装填充RBC表面硬度和散装爬行的影响.
- 为了比较快速光固化的散装填充RBC与常规照射的散装填充RBC在溶剂暴露后的稳定性.
- 研究不同储存介质 (蒸水和乙醇/水混合物) 对这些特性的影响.
主要方法:
- 测试了三种批量填充红细胞:Tetric® PowerFill (快速光固化),Tetric EvoCeram®和GrandioSO® x-tra (传统).
- 在蒸水和75%的乙醇/水中储存后,样品经过马斯硬度和批量压缩爬行测量,在37°C下长达30天.
- 在基线和储存期后评估了表面硬度 (顶部和底部) 和散装爬行.
主要成果:
- 溶剂储存显著降低了表面硬度,并增加了所有测试的红细胞的散装爬行.
- 标本的底面受溶剂储存的影响比顶面更大.
- 快速固化的Tetric® PowerFill在30天后在75%的乙醇/水中表现出44%的正常硬度下降,并增加了爬行应变.
- 增加的填料含量与更高的表面硬度和更低的爬行应变相关.
结论:
- 溶剂储存损害了散装RBC的机械完整性,降低了表面硬度,增加了爬行.
- 快固化散装填充RBC表现出相对稳定性,与传统固化材料相比,显示出有希望的性能.
- 材料配方,特别是填充剂含量,在减轻暴露于溶剂的影响方面发挥着重要作用.
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