烧结周期对多层的强度和半透明度的影响
Kedith Sawangsri1, Steven Makowka2, Sompop Bencharit3
1Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio, USA.
概括
一种新的高透光性烧结协议用于多层石,可降低曲强度,但保持临床上可接受的透光性. 这项研究比较了标准和高半透明度烧结对材料的影响.
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
- 陶工程 陶工程
背景情况:
- 烧结协议显著影响多层的机械和光学性能.
- 已经引入了一种新的高透光烧结协议,但它对材料性能的影响需要彻底验证.
- 了解这些影响对于优化牙科陶制造和临床性能至关重要.
研究的目的:
- 为了比较标准与高半透明度烧结协议对两种多层的半透明度和双轴屈曲强度的影响.
- 评估高透光协议引起的半透明度变化的临床可接受性.
- 为在牙科应用中明智选择烧结协议提供数据.
主要方法:
- 测试了两个多层的材料 (ZirCAD Prime,Prime esthetic).
- 来自半透明,梯度和牙层的样本使用标准 (1500°C) 和高半透明 (1600°C) 协议进行了烧结.
- 通过光学值 (L*,a*,b*) 和相对半透明度参数 (RTP00) 来评估半透明度. 在所有标本中测量了双轴屈曲强度.
主要成果:
- 高透光性协议显著降低了双轴屈曲强度在两个石材料的多层.
- 通过RTP00测量的半透明度在两种材料的梯度层中显著降低.
- 在Prime esthetic和Prime的牙层中观察到最高和最低的半透明度差异 (ΔRTP00).
结论:
- 高透光性烧结协议显著损害了多层的材料的双轴屈曲强度.
- 尽管强度下降,但观察到的半透明度变化仍在临床上可接受的值内.
- 需要仔细考虑烧结协议,以平衡牙科合金的光学美学和机械完整性.
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