A study on Adhesion Mechanism between Adhesive resin and Dentin

我们报道了甲基丙烯酸磷酸粘接树脂（Panavia21, Kuraray, Japan）对H_3PO_4和NaClO预处理的牙本质具有很强的附着力和优异的粘接耐久性。本研究的目的是通过透射电镜观察，阐明粘接树脂与牙本质的粘接机理。得到了以下结果：1) H_3PO_4和NaOCl处理后的牙本质基本保持完整。2)虽然已有文献报道H_3PO_4和NaOCl预处理的牙本质上不存在杂化层，但本研究中观察到的杂化层非常薄。3)在H_3PO_4和NaOCl预处理的牙本质上涂上自蚀刻底漆，在相对完整的牙本质上形成了含有树脂包封羟基磷灰石的杂化层。4)与变性胶原层形成的杂化层相比，H_3PO_4和NaOCl预处理的牙本质上的杂化层具有优异的粘接耐久性，认为这是由于没有涂片和变性胶原。

We have reported that Phosphoric Methacrylate adhesive resin (Panavia21, Kuraray, Japan) has strong adhesion and excellent adhesive durability to dentin pretreated with H_3PO_4 and NaClO.The purpose of this study was to clarify the adhesion mechanism between adhesive resin and dentin by TEM observations.The following results were obtained.1) Dentin treated with H_3PO_4 and NaOCl appeared to remain intact.2) Although it has been reported that a hybrid layr does not exist on dentin pretreated with H_3PO_4 and NaOCl, a very thin hybrid layr was observed in this study.3) When a self-etching primer was applied on dentin pretreated with H_3PO_4 and NaOCl, a hybrid layr containing resin-encapsulated hydroxylapatite was created in relatively intact dentin4) The reason for the excellent adhesive durability of the the hybrid layr on dentin pretreated with H_3PO_4 and NaOCl, in comparison with a hybrid layr formed in a denatured collagen layr, was thought to be due to the absence of smear and denatured collagen.