在上第一上发生的闭塞应力的三维有限元素分析,其中具有不同边缘形态的上第一,并用闭塞 Veneers 恢复
Qing Chen1,2, Siyang Luo3, Yujuan Wang2
1Department of Prosthodontics, School of Stomatology, Guizhou Medical University, Affiliated Stomatology Hospital of Guizhou Medical University, Guiyang, Guizhou Province, 550004, China.
BMC oral health
|November 7, 2024
概括
对于牙上的闭塞面板,在玻璃陶修复中,1.0毫米厚度是最佳的. 这种厚度可以确保机械性能满足临床需求,同时保持牙结构,为长期成功提供最少的侵入性方法.
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:
- 闭合面板是一种新的固定假肢修复,对长期成功的最佳边缘设计进行了不同的研究.
- 了解不同封闭层设计的机械行为对于开发标准化临床协议至关重要.
研究的目的:
- 使用3D有限元分析,对大第一个的各种厚度和边缘设计的封闭层进行应力分析.
- 提供机械证据,指导临床设计用于上第一个牙的闭合面膜修复.
主要方法:
- 在体外扫描和3D打印上第一牙.
- 采用三种边缘设计:直边形完成线 (SFL),边形完成线 (CFL) 和标准角倾斜线 (SCI),制备厚度为0.5毫米.
- 在动态咬力模拟下,对厚度为0.5毫米和1.0毫米的闭口 Veneers (包括牙周带) 进行了有限元素分析 (FEA).
主要成果:
- 增加SFL和CFL封闭层厚度增加了最大的Von Mises应力,而SCI显示下降趋势.
- 粘合层中的最大Von Mises应力随着塞板厚度的增加而减少.
- 由于SCI的设计,粘合剂层边缘应力超过了常见的粘合剂剪切强度,与SFL和CFL不同,SFL和CFL将应力集中在功能尖端边缘.
结论:
- 在实验条件下,所有经过测试的封闭面设计 (SFL,CFL,SCI) 都显示出符合临床要求的机械性能.
- 对于大第一上玻璃陶封闭面板的1.0毫米厚度被认为是最佳的,符合最小侵入性牙科的原则.
- 最佳的厚度和设计选择对于确保长期临床成功和机械完整性至关重要.
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