电离辐射对当前化物释放材料的机械性能的影响
Pimduean Sivavong1, Chanyared Sanprasert2, Proudfah Leekhaphan2
1Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand.
BDJ open
|February 19, 2024
概括
分数辐射增加了表面粗度,并降低了一些化物释放材料的微硬度. 经过辐射暴露后,树脂修饰的玻璃离子体水泥 (F2) 和生物活性复合材料 (AC) 的压缩强度得到改善.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 牙科材料科学 牙科材料科学
背景情况:
- 释放的牙科材料对于预防牙至关重要.
- 了解辐射对这些材料的影响对于长期的临床性能至关重要.
- 分数辐射疗法越来越多地使用,需要研究其对牙修复的影响.
研究的目的:
- 研究不同分量辐射剂量 (0,35,70 Gy) 对四种不同释放牙科材料的机械性能的影响.
- 评估辐射暴露后表面粗度,维克尔微硬度和压力强度的变化.
- 用先进的技术分析辐射后的材料组成和形态.
主要方法:
- 四种材料进行了测试:高粘度玻璃离子体水泥 (F9),树脂修饰玻璃离子体水泥 (F2),玻璃混合恢复 (EQ) 和生物活性复合材料 (AC).
- 样本被分为三组,并暴露在0,35,或70 Gy的分数辐射中.
- 机械性能 (表面粗度,维克尔微硬度,压力强度) 被评估,以及通过EDS和SEM进行化学组成和形态分析.
主要成果:
- 所有测试材料在受微分辐射暴露后表现出表面粗度增加,F9显示最高,AC显示最低.
- 维克尔微硬度在F9和EQ下降,而AC显示了最高的压力强度,其次是F2.
- 在SEM分析中,辐射样本的裂和空隙增加,化学成分没有显著变化.
结论:
- 分数辐射显著改变了释放化物的牙科材料的表面和机械性能.
- 虽然表面粗度普遍增加,在某些材料中微硬度下降,但压力强度显示材料依赖的反应.
- 树脂修饰的玻璃离子体水泥 (F2) 和生物活性复合物 (AC) 显示出更好的压力强度,表明潜在的抗辐射能力.
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