四种自酸蚀粘接剂在老化玻璃纤维增强树脂中的渗透比较
Journal of Dental Prevention & Treatment(2020)
Abstract
目的 观察4种自酸蚀粘接剂在老化玻璃纤维增强树脂(glass fiber-reinforce composite,GFRC)中的渗透表现.方法 80个以双酚A-双甲基丙烯酸缩水甘油酯和聚甲基丙烯酸甲酯为基质的GFRC样本光固化后按随机分组法分成实验组、对照组2大组,每大组4亚组,每亚组10个样本.实验组GFRC样本以5℃/55℃冷热循环方式老化,对照组GFRC样本不老化.在实验组和对照组GFRC样本表面分别涂擦加入了荧光剂的4种自酸蚀粘接剂AdperEasy One(AEO)、S3 BOND(S3B)、Tetric N-Bond Self-Etch(TNB)、G-Bond(GB),光固化.运用硬组织切磨系统切片,共聚焦激光扫描显微镜观察GFRC表面荧光剂渗透的深度,将结果进行统计学分析.结果 对照组各亚组中以AEO荧光渗透深度最大(32.58 ± 6.06)μm,TNB最浅(6.19 ± 1.38)μm,依次为AEO>GB>S3B>TNB.实验组各亚组荧光剂渗透深度均较对照组显著变浅(P<0.05),GB变化最显著(9.05 ± 2.35)μm/(28.93 ± 5.32)μm.实验组AEO荧光渗透深度最深(28.42 ± 5.32)μm,TNB最浅(1.93 ± 0.22)μm,依次为AEO>S3B>GB>TNB.实验组中AEO、S3 B的荧光剂层仍清晰易见,TNB、GB的荧光剂层则难以辨别.结论 AEO和S3B在该种老化GFRC中仍有较好的渗透效果,是其老化修复时较好的选择.
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Key words
self-etch adhesive,depth of permeation,glass-fiber reinforced composite resin,aging,fluorescent staining,confocal laser scanning microscope
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