三种薄CAD/CAM全陶皇冠材料的疲劳行为
Khaled Bataineh1, Mohammad Al Janaideh1
1Department of Mechanical Engineering, Jordan University of Science and Technology, Irbid, Jordan.
International biomechanics
|January 11, 2024
概括
皇冠厚度显著影响CAD/CAM陶疲劳寿命. 超薄的金玉皇冠 (0.7mm) 显示了弹性,而离玉皇冠需要1.5mm厚度才能够长期生存.
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:
- 在现代牙科中,CAD/CAM陶修复被广泛使用.
- 了解这些材料在不同阻塞负荷下的疲劳寿命对于临床成功至关重要.
- 皇冠厚度是影响修复耐用性的关键设计参数.
研究的目的:
- 研究不同封闭冠厚度对CAD/CAM陶材料疲劳寿命的影响.
- 为了在模拟生理条件下比较和脱酸盐 (LD) 的疲劳性能.
主要方法:
- 虚拟设计的CAD/CAM冠与三个封闭厚度:0.7mm (A组),1.1mm (B组) 和1.5mm (C组).
- 研究的材料: (Cercon ZC) 和IPS e.max CAD (LD). 这两种材料均为研究材料.
- 用有限元分析 (FEA) 模拟来预测不同负载 (50N,100N,120N) 下的疲劳寿命.
主要成果:
- 对于,B组 (1.1mm) 和C组 (1.5mm) 在疲劳寿命上没有显著差异. 甲组 (0.7mm) 石冠预计在50N时的生存时间为24年,在100N时为4.3年,在120N时为1.9年.
- 对于LD,所有组都在50N下存活了5年以上. 只有C组 (1.5mm) 在100N下存活超过5年.
- 厚度为0.7毫米的石皇冠在生理条件下表现出足够的耐力.
结论:
- 超薄的 (0.7mm) 全轮的合金皇冠表现出足够的疲劳强度,用于长期的临床性能.
- 二氧化 (LD) 冠需要至少1.5mm厚度,以确保在典型的生理负荷下存活超过5年.
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