双层和单质内冠的比较评估:断裂耐力,故障模式和应力分布
Haider Ali Ibrahim1, Haider Hasan Jasim1, Wiam Ali El Ghoul2
1Department of Conservative Dentistry, College of Dentistry, Mustansiriyah University, 6 St, Al Karkh, Baghdad Governorate, Iraq.
概括
与VITA Enamic内带有双层内冠,与单质二酸盐 (LDS) 内冠相比,可以提供更好的骨折抵抗力和更好的下牙应力分布. 同时,Cerasmart内分泌器也显示出更好的修复能力.
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
- 恢复性牙科 恢复性牙科
背景情况:
- 内冠是用于内牙治疗的牙的CAD/CAM制造的修复.
- 评估不同内冠设计的生物力学性能对于临床成功至关重要.
研究的目的:
- 为了比较单一的二酸盐 (LDS) 内冠与双层内冠的负载到断裂,故障模式和应力分布.
- 调查双层内冠与树脂基质陶内核 (VITA Enamic和Cerasmart) 进行LDS面.
主要方法:
- 三十六个下第一个牙被分为三个组:单质LDS,VITA Enamic双层和Cerasmart双层.
- 修复经历了25万个机械加载周期,随后进行了断裂阻力测试.
- 用有限元分析 (FEA) 来评估应力分布.
主要成果:
- 所有的内冠都在机械循环中幸存下来.
- 维塔乙烯基双层内冠显示出明显更高的骨折抵抗比单质LDS和Cerasmart双层内冠.
- 与单体设计相比,FEA在双层内冠中显示较低的应力度,特别是与VITA Enamic相比.
结论:
- 双层内冠,特别是具有VITA Enamic内皮的内冠,表现出优越的生物力学性能.
- 内核材料的选择显著影响了双层内核的骨折抵抗和应力分布.
- 与单体LDS相比,Cerasmart内脏显示出更高的可修复性故障率.
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