SEM observation of novel characteristic of the dentin bond interfaces of universal adhesives
SEM observation of novel characteristic of the dentin bond interfaces of universal adhesives
复制标题
通用型粘合剂牙本质粘合界面新特性的SEM观察
DOI：
10.1016/j.dental.2019.10.006
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发表时间：
2019
期刊：
影响因子：
5
通讯作者：
MIyazaki M
中科院分区：
文献类型：
--
作者：
Takamizawa T;Imai A;Hirokane E;Tsujimoto A;Barkmeier WW;Erickson RL;Latta MA;MIyazaki M
目的用扫描电子显微镜观察普通粘接剂的树脂/牙本质界面，并与常规酸洗(ER)和自酸蚀(SE)粘接系统进行比较。方法分别用两种三步法和一种两步法的ER粘结剂和两种两步法和两种单步法的SE粘结剂分别与7种通用粘结剂在ER模式和SE模式下进行比较。带有牛牙的粘结表面被纵向剖切和镜面抛光。一半的样品用HCl和NaOCl溶液处理。结果7种通用粘接剂和单步SE粘结剂的粘接层厚度基本相同。SE模式下的通用粘结剂在AL和牙本质之间形成了一层混合涂抹层，作为高密度区。ER模式下通用粘接剂的杂化层厚度为∼1~2μm，在HL下方有一高密度层(反应层[RL])。结论大多数SE模式下的通用粘接剂与单步SE粘接剂的形态特征相似。虽然ER模式下通用粘接剂的树脂-牙本质界面与ER粘接剂相似，但通用粘接剂有一个独特的特征，即RR。意义即使在ER模式下使用通用粘结剂，RL也可能是化学结合的标志。
ObjectiveThe aim of this study was to observe the resin/dentin interfaces of universal adhesives by using scanning electron microscopy (SEM), and to compare their morphologies with conventional etch & rinse (ER) and self-etch (SE) adhesive systems.MethodsTwo three-step and one two-step ER adhesives and two two-step and two single-step SE adhesives were used for comparison with seven universal adhesives in ER mode and SE mode, respectively. Bonded surfaces with bovine teeth were longitudinally sectioned and mirror-polished. Half of the samples were treated with HCl and NaOCl solutions. The interfaces were subjected to argon ion beam etching and then observed by scanning electron microscopy.ResultsThe thickness of the adhesive layer (AL) of most of the seven universal adhesives and single-step SE adhesives was similar. Universal adhesives in SE mode formed a hybrid smear layer as a high-density zone between the AL and dentin. The thickness of the hybrid layer (HL) of the universal adhesives in ER mode was ∼1–2 μm, with a high-density zone (reaction layer [RL]) below the HL.ConclusionThe morphological features of most universal adhesives in SE mode and single-step SE adhesives are similar. Although resin–dentin interfaces of universal adhesives in ER mode resemble those of ER adhesives, universal adhesives have a distinctive feature, an RL.SignificanceThe RL might be a sign of chemical bonding even when using universal adhesives in ER mode.