一种经过热水衰老的实验性化硬化的复合材料的表征
Laura F Carvalho1, Edmara T P Bergamo1, Tiago M B Campos1
1Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru 17012-901, SP, Brazil.
概括
实验性ATZ复合材料在老化条件下比3Y-TZP石具有更高的稳定性,这表明它对牙修复的潜力. 这两种材料在老化协议后都保持了很高的生存概率.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 牙科陶 牙科陶 的使用.
背景情况:
- 基于的牙材料易受老化降解,影响其机械性能.
- 氧化-二氧化 (ATZ) 复合材料正在探索作为传统的替代品.
- 了解老化协议对ATZ和的影响对于临床应用至关重要.
研究的目的:
- 评估汽和热水老化对ATZ复合材料的化学,物理和机械性能的影响.
- 为了比较实验ATZ复合材料与3Y-TZP的耐老性.
- 评估ATZ适用于长期重建性牙科应用的适用性.
主要方法:
- 盘状的ATZ (80%ZrO2/20%Al2O3) 和3Y-TZP标本在134°C处经过了20小时的即时,自和热水反应堆老化.
- 通过X射线衍射 (XRD) 分析了晶体相.
- 纳米印测量了弹性模量 (Em) 和硬度 (H). 双轴屈曲强度和韦布尔统计学决定了机械性能和可靠性.
主要成果:
- 在ATZ和3Y-TZP中,老化诱导的单临床相形成.
- 水热老化减少了ATZ中的Em和ATZ和3Y-TZP中的H.
- 老化显著增加了ATZ的特征强度,但降低了3Y-TZP的特征强度,两种材料的生存概率高 (>99%),高达500MPa.
结论:
- 与老化后的3Y-TZP相比,ATZ复合材料表现出优越的物理和微观结构稳定性.
- 实验性ATZ材料由于其增强的稳定性,对长期的重建性牙科应用具有前景.
- 这两种材料在与牙科修复相关的模拟老化条件下都表现出可靠的性能.
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