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光聚合延迟对双聚合树脂水泥的结合强度和微硬度的影响
B Alsayed1, A A Suliman2, W Clark3
1Basheer Alsayed, BDS, MS, Division of Comprehensive Oral Health, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Operative dentistry
|June 23, 2023
概括
优化光聚合延迟对于双聚合树脂水泥至关重要. 较短的延迟 (粘合剂0-2分钟,自粘合剂2-5分钟) 提高牙粘合强度,而较长的延迟会损害性能.
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:
- 双聚合树脂水泥结合光和化学固化,以提高性能.
- 了解聚合元件之间的相互作用对于最佳性能至关重要.
- 聚合过程中出现的干扰会对水泥的性能和临床结果产生负面影响.
研究的目的:
- 研究光聚合延迟时间对双聚合树脂水泥牙切割键强度 (SBS) 和维克尔斯微硬度 (HV) 的影响.
- 在不同的光聚合延迟条件下比较自粘和粘双聚合树脂水泥的性能.
主要方法:
- 自粘 (RelyX Unicem 2) 和粘合 (RelyX Ultimate) 水泥在牙样本 (n=80) 上的评估剪接强度 (SBS) 按照ISO 29022:2013.
- 根据ASTM E384-17对水泥样本 (n=32) 进行评估的维克尔斯微硬度 (HV).
- 在储存24小时后测试样本,分析数据使用双向ANOVA分析水泥类型和光聚合延迟效应.
主要成果:
- 与所有其他组合相比,粘合水泥在0分钟和2分钟的延迟时间显示出明显更高的SBS (p<0.0001).
- 树脂水泥类型显著影响了SBS (p<0.0001),但水泥类型和延迟时间之间的相互作用对HV (p=0.3550) 没有显著影响.
- 自粘性水泥的延迟时间为2-5分钟,粘性水泥的延迟时间为0-2分钟.
结论:
- 光聚合延迟时间在双聚合树脂水泥中显著影响牙切割键强度.
- 将光聚合延迟到10分钟,导致两种水泥类型的SBS和微硬度都较差.
- 特定的延迟时间窗口 (0-2分钟用于粘合剂,2-5分钟用于自粘合剂) 最大化了对牙的粘合强度.
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