相关实验视频

Updated: May 24, 2025

Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins

Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins

Published on: January 17, 2025

漂白剂对 ортодонтика热塑性保持材料的压力强度的影响

Ailin Ehteshami¹, Saina Omidi¹, Maede Ghasemi²

¹Department of Orthodontics, Dental Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.

Dental research journal

|March 3, 2025

概括

起初不建议使用热塑性保持剂进行牙漂白. 虽然碳胺过氧化物降低了PETG强度,但热循环并没有恶化这些效应,这表明在保留中可能在以后使用.

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
ортодонтическая技术 ортодонтическая技术 ортодонтическая 技术在牙上

背景情况:

越来越多的患者对正牙后牙美白的需求.
需要评估漂白剂对正统牙科支材料的影响.
在模拟的临床条件下对聚乙烯二甲酸甘醇 (PETG) 材料特性进行评估.

研究的目的:

为了评估15%的碳胺过氧化物和热循环对PETG保持材料的压力强度的影响.
为了确定漂白剂是否会损害热塑性保持剂的结构完整性.
调查漂白和模拟老化对PETG的联合影响.

主要方法:

在体外研究中使用了40个PETG样本,热成型成保持器形状.
组:对照组,15%的碳胺过氧化物暴露,热循环 (5000个循环) 和组合暴露.
使用单向ANOVA和图基HSD进行压力强度测试,用于统计分析 (α=0.05).

主要成果:

与对照组相比,所有测试组的压力强度都显著下降.
单纯的碳胺过氧化物 (II 组) 导致压力强度最低 (163.9 MPa).
热循环并没有显著改变由碳胺过氧化物引起的压力强度降低.

结论:

在最初的保留阶段,不建议使用热塑性保留剂作为漂白托盘.
由于15%的碳胺过氧化物,PETG保持器的结构完整性受到损害.
热循环不加剧漂白剂对PETG的负面影响,这表明在保留过程中可能在以后使用.

关键词:

漂白剂是一种漂白剂.碳酸过氧化物碳酸过氧化物 ортодонтических 保持器保持器保持器聚乙烯二甲甲酸盐是什么?

更多相关视频

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Published on: July 21, 2014

相关概念视频

Plasticizers

Plasticizers

Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...

Plastic Behavior

Plastic Behavior

A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...