预热和注入散装填充树脂复合材料:微CT分析二级修复中的内部空隙和边缘适应
Vanessa Alves de Sá1, Hélio Radke Bittencourt1,2, Luiz Henrique Burnett Júnior1
1Department of Restorative Dentistry, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre 90619-900, Brazil.
Materials (Basel, Switzerland)
|January 25, 2025
概括
散装填充树脂复合材料注入到空洞中显示的内部空洞比传统方法少. 注射技术对于边缘适应比预热散装填料材料更为关键.
科学领域:
- 牙科材料科学 牙科材料科学
- 恢复性牙科 恢复性牙科
- 生物材料工程 生物材料工程
背景情况:
- 二级牙是常见的牙科修复,需要精确的材料适应.
- 大量填充树脂复合材料比传统的增量技术具有潜在的优势.
- 空洞形成和边缘完整性是影响恢复寿命的关键因素.
研究的目的:
- 为了评估体外空隙形成和散装树脂复合材料的边际适应.
- 为了比较预热与非预热材料,注入与增量技术.
- 评估不同散装复合材料在II类空洞中的性能.
主要方法:
- 在24°C或68°C的温度下,使用四种散装填充材料 (Filtek Universal,Filtek One,Admira Fusion X-tra,VisCalor) 修复了80个有II类腔的人类牙.
- 微计算机断层扫描 (micro-CT) 用于分析内部空隙百分比 (%IV).
- 边际适应被评估为牙和牙中的连续边缘 (%CM) 的百分比.
主要成果:
- 批量填充材料,特别是Filtek One和Viscalor,与对照组相比,内部空洞明显较小.
- 预热VisCalor显著减少了内部空隙.
- 没有观察到温度对边际适应的显著影响.
- 在24°C时,VisCalor在牙中显示出优异的边际适应性.
结论:
- 注射散装填充树脂复合材料通常会比传统的增量技术少产生内部空隙.
- 为了实现良好的边际适应,注入方法似乎比材料预热更为关键.
- 特定的散装填充材料和技术可以优化二级修复中的空隙减少和边际完整性.
更多相关视频
07:42Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
303
05:30Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
Published on: January 10, 2025
532
相关概念视频
Porosity in Cement Paste
110
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
110
Total Voids in Concrete
94
Total voids in concrete encompass gel water volume, capillary pores, and entrapped air. Gel water (retained within the cement hydration products) and physically entrapped or adsorbed water are significant for the hydration process. For complete hydration, it's estimated that the space needed for the products of a cubic centimeter of cement doubles. Capillary pores constitute the unoccupied space within the hydrated cement paste, with their size largely influenced by the water-to-cement...
94
