评估所有陶皇冠的保留和断裂强度,使用三个不同的美观造后核心系统
Sina Safari1, Amirmohammad Mirzapour2, Roya Sadrmohammadi3
1Student Research Committee and Department of Prosthodontics, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
International journal of dentistry
|October 9, 2023
概括
这项研究将全陶皇冠与改性复合树脂和陶芯与传统造柱和芯系统进行了比较. 骨折强度没有显著差异,但控制和IPS Empress组的保留强度最高.
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
- 牙修复 牙修复 牙修复 牙修复 牙修复
背景情况:
- 牙科修复需要持久的柱子和核心系统来支牙冠.
- 全陶修复提供了美学优势,但其核心材料的完整性至关重要.
- 评估新型核心材料对于长期临床成功至关重要.
研究的目的:
- 为了比较所有陶冠与改性复合树脂和陶芯的断裂和保留强度,与传统造柱和芯系统相比.
- 在模拟的临床条件下评估不同核心材料的机械性能.
主要方法:
- 人类牙被扫描用于柱子和核心的3D打印,用40只牛牙用于测试.
- 建立了四个组:造核心 (控制),用IPS Empress造核心,复合材料覆盖的造核心和陶覆盖的造核心.
- 骨折强度 (135°压力) 和保持强度 (拉开测试) 在老化后被评估,通过ANOVA和曼·惠特尼U测试进行统计分析.
主要成果:
- 在四组中没有观察到骨折强度的统计学上显著差异 (P=0.997).
- 与复合材料和陶组相比,对照组和IPS Empress组的保留强度显著更高.
- IPS Empress组的保留强度与对照组相比较.
结论:
- 与传统造芯相比,经过修改的复合树脂和陶芯没有影响全陶冠的断裂强度.
- IPS Empress 材料的保持强度与传统造芯相比较,这表明它适用于后期和核心应用.
- 传统的造和IPS Empress芯比复合材料或陶覆盖的造芯具有更高的保留强度.
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