两种不同的超快速固化暴露时间对批量填充复合材料表面硬度的影响 - 一项体外研究
Shekar Shobana1, Anandavelu Sujareetha1, Sundaresan Balagopal1
1Department of Conservative Dentistry and Endodontics, Tagore Dental College and Hospital, Rathinamangalam, Tamil Nadu, India.
概括
与超快速固化单元相比,传统固化灯在树脂基复合材料中表现出优越的微硬度. 低强度,更长时间的固化比高强度,更短时间的方法产生更好的结果.
科学领域:
- 牙科材料科学 牙科材料科学
- 聚合物化学 聚合物化学
- 生物材料工程是生物材料的工程.
背景情况:
- 基于树脂的复合材料 (RBC) 在牙科修复中被广泛使用.
- 优化固化效率对于红细胞的机械性能和寿命至关重要.
- 超快速固化模式可以减少椅子使用时间,但它们对材料性能的影响需要研究.
研究的目的:
- 为了评估红细胞的微硬度,当使用超快的模式在不同的曝光时间治愈时.
- 为了比较超快速固化与标准固化方案实现的微硬度.
主要方法:
- 一项体外实验研究,涉及45个圆柱形红细胞样本.
- 标本被分为三个组:超快固化 (1s,2300 mW/cm2),超快固化 (3s,2300 mW/cm2) 和标准固化 (20s,1000 mW/cm2).
- 维克尔的微硬度在固和未固的表面上使用电动微型入器测量.
主要成果:
- 使用标准方案治愈的红细胞的微硬度明显高于使用超快模式治愈的红细胞.
- 在测试的两个超快固化持续时间之间没有观察到微硬度的显著差异.
结论:
- 与高强度超快固化装置相比,传统的低强度固化灯在RBC中实现微硬性方面表现优越.
- 这些发现表明,目前的超快固化技术可能会损害树脂基复合材料的最佳聚合和由此产生的微硬度.
相关概念视频
01:20Curing of Concrete
94
The hydration of cement takes place within the water-filled capillary pores. However, environmental elements can disrupt this process by evaporating water from the concrete surfaces. Sealed concrete with a water-cement ratio below 0.5 experiences self-desiccation, leading to water loss. The water loss in concrete is mitigated by curing. This technique involves keeping the concrete saturated to maintain the necessary temperature and moisture conditions, to optimally fill the spaces in the cement...
94
01:25Accelerated Curing of Concrete
126
Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...
126