制协议对不同CAD-CAM材料疲劳行为的影响
Rafaela Oliveira Pilecco1, Maria Gabriela Packaeser2, João Paulo Mendes Tribst3
1Department of Conservative Dentistry, Faculty of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil.
概括
树脂复合材料的皇冠显示出比脱酸盐更好的耐疲劳性,无论是如何磨. 灾难性断裂负载在材料或削设置之间没有显著差异.
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
- 机械工程 机械工程
背景情况:
- 牙科修复需要具有优良机械性能和耐疲劳的材料.
- 削协议可以影响牙科陶和复合材料的微观结构和性能.
- 了解疲劳行为对于预测间接恢复的寿命至关重要.
研究的目的:
- 为了比较使用不同协议磨的脱酸盐和树脂复合金冠的疲劳行为.
- 评估这些修复材料的断裂负荷和磨损特性.
- 评估磨削模式对牙科修复材料疲劳性能的影响.
主要方法:
- 二氧化和树脂复合金冠以精细或超精细方式磨.
- 进行了循环疲劳测试,以评估直到裂开始的生存时间.
- 进行了断裂负荷测试,有限元素分析,地形,断层和烧伤磨损分析.
主要成果:
- 树脂复合材料表现出优越的疲劳行为 (更高的生存率,直到裂) 与脱酸盐相比.
- 对于任何一种材料,在磨削模式之间没有发现疲劳行为的显著差异.
- 灾难性骨折负荷在所有组中都是相似的;超细磨削增加了磨磨损.
结论:
- 树脂复合冠提供更好的耐疲劳,直到裂检测比脱酸盐.
- 研磨模式没有显著影响测试材料的疲劳行为或断裂负载.
- 材料选择对于疲劳性能至关重要,而削模式主要影响工具磨损.
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