复合材料的半透明度和吸收度对光聚合过程中的温度变化的影响
1Department of Conservative Dentistry, School of Dentistry and Dental Research Institute, Seoul National University.
Dental materials journal
|September 28, 2023
概括
选择牙复合材料色调会影响光固化过程中产生的热量. 透明度较低,吸收性更强的色调会增加温度,可能会造成脉损伤的风险,特别是在常规复合材料中.
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
- 生物医学工程 生物医学工程
背景情况:
- 牙复合材料的光聚合会产生热量,对牙纸构成风险.
- 了解复合材料特性对热量产生的影响对于临床安全至关重要.
- 传统和散装复合材料在处理和固化特性上有所不同,可能会影响热量输出.
研究的目的:
- 研究传统和散装复合材料的半透明度和吸收度对光聚合过程中的温度变化的影响.
- 为了比较FiltekTM-Z350-XT (传统) 和Tetric®-N-Ceram (批量填充) 复合材料在不同颜色的热性能.
- 为了确定复合材料的光学特性 (透光,吸收) 和热量产生之间的关系.
主要方法:
- 准备了FiltekTM-Z350-XT和Tetric®-N-Ceram三种颜色的圆盘形标本 (n=3).
- 标本经历了两次20秒的LED光照曝光.
- 使用非接触式红外传感器测量温度变化 (ΔT总,ΔT光,ΔT复合).
主要成果:
- ΔTtotal 和 ΔTlight 与 ΔTcomposite 相比,在复合色彩中变化更大.
- 与散装复合材料相比,传统复合材料的 ΔTtotal 和 ΔTlight 值较高.
- 增加吸收率和减少半透明度参数导致较高的 ΔTtotal 和 ΔTlight.
结论:
- 复合材料的阴影选择显著影响光聚合过程中的温度升高.
- 较低的透光度和更高的吸收度与增加的热量产生有关.
- 临床医生应考虑复合材料的光学特性,特别是阴影,以减轻深腔热引起的脉损伤的风险.
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