在热循环之前和之后对两种调整材料的硬度和弹性模块评估:一项比较研究
1Department of Parodontic, Orthodontic, and Preventive Dentistry, College of Dentistry, University of Mosul, Iraq.
Georgian medical news
|July 31, 2023
概括
这项研究比较了Duran®和Erkodur®透明对齐材料,发现Erkodur®的硬度更高,但Duran®的弹性模量更高. 热循环减少了Erkodur®的硬度,比Duran®更显著.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 矯正牙科 矯正牙科是一種矯正牙科.
背景情况:
- 透明对齐器是传统支架的越来越受欢迎的替代品.
- 了解材料特性对于优化正牙治疗精度至关重要.
- 热循环对调整器材料机械性能的影响需要研究.
研究的目的:
- 评估热循环对两个热塑性对齐材料Duran®和Erkodur®的硬度和弹性模量的影响.
- 为了比较Duran®和Erkodur®在模拟口腔环境变化之前和之后的机械性能.
- 为牙正医提供关于清晰对齐器治疗中的材料性能的数据.
主要方法:
- 测试了两个热塑性材料 (Duran® 0.75毫米,Erkodur® 1毫米).
- 使用3D打印来准备样本,进行硬度 (盘) 和拉伸性测试 (狗骨形状).
- 在热循环之前和之后进行了Shore D硬度和拉伸性测试 (ASTM D882-02,ASTM D638-02a).
主要成果:
- 在热循环处理之前和之后,Erkodur®的硬度高于Duran®.
- 热循环显著降低了Erkodur®的硬度,而Duran®没有显著的变化.
- 杜兰®在热循环之前和之后表现出比Erkodur®更高的弹性模量,热循环没有显著的影响.
结论:
- 埃尔科杜尔 (Erkodur®) 提供了优越的硬度,而杜兰 (Duran®) 则为正义牙透明对齐器提供了更高的弹性模量.
- 热循环对Erkodur®的硬度产生了比Duran®更大的负面影响,这表明了潜在的材料降解.
- 材料选择应考虑硬度和弹性模量之间的权衡,特别是在模拟的口腔条件下.
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