在热力机械老化之前和之后,CAD-CAM所有陶冠的拉力强度
Chan-Ho Park1, Kyung-Ho Ko1, Yoon-Hyuk Huh1
1Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea.
概括
树脂纳米陶 (RNC) 皇冠在老化后显示出拉伸键强度 (TBS) 的增加,不同于二氧化 (LS2) 和. 这项研究比较了RNC,LS2和在老化后的支柱上修复的TBS.
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:
- 支柱在牙科修复中至关重要.
- 评估与结合的各种皇冠材料的长期稳定性至关重要.
- 在模拟的口腔条件下了解材料的行为是临床成功的关键.
研究的目的:
- 为了比较树脂纳米陶 (RNC),和二氧化 (LS2) 修复的抗拉强度 (TBS).
- 为了评估热机械老化后的TBS变化.
- 在模拟的条件下评估水泥-修复-支柱接口.
主要方法:
- 制造每组12个标本,用于与支柱结合的四种皇冠材料 (2个RNC,LS2,半透明).
- 在空气颗粒磨损后使用树脂水泥进行凝固.
- 使用模拟器对一半的标本进行热力学老化 (200,000 个周期,50 N,2 Hz).
- 通过使用通用测试机和使用SEM的接口分析来测量TBS.
主要成果:
- 热力学老化降低了脱酸盐 (LS2) 中的TBS,并维持了它在中.
- 树脂纳米陶 (RNC) 在老化后显示TBS增加 (p < 0.001).
- 在RNC标本的老化后,SEM揭示了减少的界面间隙,这表明了更好的结合.
结论:
- 皇冠材料在热力学老化后显著影响TBS.
- 与LS2和合金相比,RNC冠状表现出增强的TBS稳定性和界面完整性.
- 经过RNC的修复,在支柱上加时,显示出有前途的耐用性.
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