在老化过程中,多层半透明的不同区域的屈曲强度和表面特征的变化
Jeong-Min Ham1, Jong-Hyuk Lee1, Seung-Ryong Ha1
1Department of Prosthodontics, College of Dentistry, Dankook University, Cheonan, Republic of Korea.
Journal of materials science. Materials in medicine
|October 11, 2025
概括
这项研究发现,多层半透明 (TZ) 在老化后保持曲强度,尽管表面粗度增加. 含量和老化显著影响机械性能,除了曲强度.
科学领域:
- 牙科材料科学 牙科材料科学
- 陶工程 陶工程
- 生物材料是一种生物材料.
背景情况:
- 半透明 (TZ) 由于其美学和机械性能,在牙科修复中被广泛使用.
- 了解多层TZ在老化条件下的行为,特别是它的过渡区,对于长期的临床性能至关重要.
- 不同的屈曲强度测试方法 (4点曲屈曲强度 [4PBFS]和双轴屈曲强度 [BFS]) 之间的相关性需要进一步研究.
研究的目的:
- 评估经过老化后在多层半透明中 (TZ) 过渡区的机械和表面特性.
- 分析不同TZ配方的4点曲屈曲强度 (4PBFS) 和双轴屈曲强度 (BFS) 之间的相关性.
- 研究衰老对各种TZ类型的微观结构和特性的影响.
主要方法:
- 五种类型的IPS E.max ZirCAD块 (传统和多层TZ) 用于制造磁盘和条形标本.
- 标本在134°C和0.2MPa的自闭柜中经过了0,5小时和10小时的老化.
- 分析了机械性能 (4PBFS,BFS,纳米沉硬度,扬斯模量,维克尔硬度) 和表面特征.
主要成果:
- 稳定了4和5的四角形多晶体 (4Y-TZP,5Y-TZP) 呈现出最高的屈曲强度和韦布尔特征强度,无论老化.
- 多层TZ (3Y/5Y-TZP和4Y/5Y-TZP) 在老化后显示出与传统TZ (3Y-TZP,4Y-TZP) 相当的屈曲强度.
- 由于相位转换引起的老化诱导的表面升起和微裂,特别是在3Y-TZP和3Y/5Y-TZP中,导致表面粗度增加.
结论:
- 多层TZ (3Y/5Y-TZP,4Y/5Y-TZP) 的屈曲强度即使经过老化,也与传统TZ (3Y-TZP,4Y-TZP,5Y-TZP) 相比.
- 老化显著增加了3Y-TZP和3Y/5Y-TZP的表面粗度.
- 含量和老化相互作用,影响机械和表面性能,屈曲强度是例外.
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