烧结时间对伊特里亚部分稳定单质石的微观结构和光学性能的影响
Mahinour A Yousry1, Ihab A Hammad1, Mohamed T El Halawani1
1Division of Fixed Prosthodontics, Department of Conservative Dentistry, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
概括
快速烧结 (SS) 显著减少了伊特里亚稳定的颗粒大小和半透明度,影响了光学性能. 虽然通常可以接受,但有一种材料在SS后显示出临床上不可接受的颜色差异.
科学领域:
- 牙科材料科学 牙科材料科学
- 陶工程 陶工程 陶工程
- 生物材料是一种生物材料.
背景情况:
- 伊特里亚稳定 (YSZ) 在牙科中广泛使用.
- 烧结是影响YSZ微观结构和属性的关键步骤.
- 评估新的烧结方法,如速度烧结 (SS),对于材料优化至关重要.
研究的目的:
- 研究快速烧结 (SS) 与常规烧结 (CS) 对3mol%和5mol%亚特里亚部分稳定 (3Y-PSZ和5Y-PSZ) 的微观结构和光学性能的影响.
主要方法:
- 来自五个商业区的已制备的体样本 (3Y-PSZ和5Y-PSZ).
- 应用常规烧结 (CS,7小时) 和快速烧结 (SS,90分钟) 协议.
- 分析了微观结构 (SEM),相位分数 (XRD),半透明度 (TP00),对比率 (CR) 和颜色差异 (ΔE00).
主要成果:
- 快速烧结在所有测试的YSZ材料中显著减少了颗粒大小.
- 对于所有材料,SS降低了透光度 (TP00) 和增加了对比度 (CR).
- 在CS和SS之间的颜色差异 (ΔE00) 在临床上是可以接受的,除了一种材料 (Lava Plus).
结论:
- 快速烧结改变了YSZ的微观结构,显著减少了颗粒大小.
- 这些微观结构的变化直接影响光学特性,特别是半透明度.
- 虽然SS提供了时间效率,但它对颜色稳定性的影响需要仔细选择材料.
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