复合单体转换和微硬化使用短固化时间
Marcelo Giannini1, Eduardo F de Castro1, Beatriz Ometto Sahadi1
1University of Campinas, Piracicaba Dental School, Departamento de Dentística Restauradora, Piracicaba, SP, Brazil.
Brazilian dental journal
|December 10, 2025
概括
使用激光或LED光固化单元 (LCU) 的短固化时间会影响散装复合材料的性能. 较长的LED曝光时间 (20秒) 实现了更高的单体转换和足够的深度固化,与较短的激光或LED持续时间不同.
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 生物材料工程
背景情况:
- 大量填充复合材料提供临床效率,但需要适当的光固化以获得最佳性能.
- 了解短,高强度固化时间对材料性能的影响对于临床成功至关重要.
研究的目的:
- 为了评估使用激光和LED光固化单元 (LCU) 的短固化间隔对散装复合材料的单体转换和微硬度的影响.
- 为了比较激光和LED LCU在非常短的固化时间下提供的不同辐射暴露的有效性.
主要方法:
- 使用了两个LCU (激光和多峰LED) 和一个散装复合材料.
- 样品经过短时间的固化 (1-3秒激光,3-20秒LED).
- 在不同深度测量了单体转换 (FTIR) 和微硬度;记录了光谱辐射和辐射暴露.
主要成果:
- 4mm的单体转化增加了两个LCU的更长的固化时间,与辐射暴露相关.
- 在20秒的LED曝光中,与较短的时间相比,单体转化率显著提高.
- 微硬度随着深度的下降,但只有20秒的LED曝光才能达到足够的底部到顶部比率 (0.84).
结论:
- 短固化时间,特别是激光LCU,可能会损害单体转换和深度微硬度.
- 延长的LED固化 (20秒) 证明了批量填充复合材料的卓越性能,确保了足够的聚合.
- 辐射暴露是影响固化深度和材料性能的关键因素.
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