与5Y-TZP合金相比,压缩脱酸盐陶的疲劳行为和可靠性在不同的加载协议下不同
Ramona Buser1, Mustafa Borga Dönmez2, Moritz Hoffmann3
1Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Department of Prosthetic Dentistry, Dental School, Ludwig-Maximilians-Universität München, Munich, Germany.
概括
这项研究比较了在动态负载下脱酸陶和伊特里亚稳定的疲劳性能. 伊特里亚稳定显示出优越的疲劳耐受性,而一个特定的加载协议被证明是有效的评估陶疲劳行为.
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:
- 牙假体需要具有高耐疲劳性和可靠性的材料.
- 压离陶和伊特里亚稳定 (5Y-TZP) 常用于单体修复.
- 在动态负载下了解它们的疲劳行为对于临床寿命至关重要.
研究的目的:
- 为了比较5Y-TZP与5个压脱酸盐陶的疲劳行为和可靠性.
- 评估三种不同的动态加载协议对材料性能的影响.
- 确定最有效的方法来评估这些牙科陶的疲劳特性.
主要方法:
- 制造了五种脱酸陶和5Y-TZP的条形样本.
- 样本经过静态断裂负载测试或动态负载,负载逐渐增加,直到故障.
- 统计分析包括ANOVA,Scheffé测试,Kaplan-Meier生存分析和Pearson的相关性.
主要成果:
- 材料类型对断裂负荷和屈曲强度有显著影响,5Y-TZP显示最高值.
- 材料和加载协议之间的相互作用影响了故障周期的数量.
- 负载协议2对脱陶是最佳的,而协议1和3对5Y-TZP在循环和生存率方面是最佳的.
结论:
- 所有经过测试的材料,平均屈曲强度>100 MPa,都适用于粘合性合的单一单元假肢.
- 5Y-TZP与压缩脱酸盐陶相比,通常表现出优越的疲劳行为.
- 装载协议3提供了一种节省时间的方法来评估压缩离陶的疲劳行为.
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