对TheraCal LC对纸内部温度分布的影响进行数值调查
Bahra H Agha1, Farqad Rasheed Saeed2
1College of Dentistry, Hawler Medical University, Kurdistan Region, Iraq.
概括
在光固化过程中,TheraCal LC显著提高了脉温度,特别是在深腔中. 这种热效应对牙纸构成风险,超过安全温度值.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物医学工程 生物医学工程
- 计算建模 计算建模
背景情况:
- 光固化牙材料可以产生热量.
- 了解复原材料对纸的热效应对于患者安全至关重要.
- TheraCal LC 是一个常用的光可固化的内.
研究的目的:
- 为了评估光固化过程中TheraCal LC引起的内脉温度升高.
- 评估剩余牙厚度和固化距离对热效应的影响.
- 为了确定TheraCal LC是否对牙纸造成热风险.
主要方法:
- 使用COMSOL Multiphysics开发了一个下牙的经过验证的3D有限元模型.
- 在生理条件 (37°C) 下进行模拟,牙厚度 (0.5mm,1mm) 和固化距离 (2mm,5mm) 不同.
- 分析了带有和没有TheraCal LC的脉内温度变化 (ΔT).
主要成果:
- 与基线相比,TheraCal LC显著增加了脉内温度.
- 剩余的牙厚度为0.5mm,导致温度升高超过12°C.
- 较短的固化距离 (2mm) 加剧了温度的增加.
- 使用TheraCal LC的所有测试条件都超过了脉损伤的关键5.5°C值.
结论:
- 在光固化过程中,TheraCal LC会产生大量的热量.
- 该材料对脉组织构成热性风险,特别是在残留牙薄的深腔中.
- 临床方案应考虑牙厚度和固化参数,以减轻热损伤.
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