自酸蚀和全酸蚀粘接系统粘接界面的形态学观察  

Interfacial Micromorphology of Total-etching Vers Self-etching System Created in Dentin

作　　者：师保江[1] 张琛[1] 侯本祥[1] 

机构地区：[1]首都医科大学附属北京口腔医院牙体牙髓科

出　　处：《首都医科大学学报》2006年第2期257-260,共4页Journal of Capital Medical University

基　　金：北京市科委科技新星计划(H013610290113)资助项目

摘　　要：目的探讨5种牙本质自酸蚀粘接剂及1种牙本质全酸蚀粘接系统粘接界面的超微形态学特点。方法选择无龋人离体磨牙,片切冠部牙釉质,暴露牙本质,按说明书要求分别使用5种牙本质自酸蚀剂(FL-Bond、Adper Prompt、Cleaxfil SEBond、Xena、One-UP Bond F)和1种牙本质全酸蚀剂(Frime&Bond NT),表面充填树脂,厚2 mm。光固化后平行牙长轴方向将其片切,制备扫描电镜试样,观察各种粘接剂粘接界面的超微形态。结果自酸蚀粘接系统形成的混合层较薄,但均匀一致,树脂突与管周牙本质结合紧密,无裂隙出现;全酸蚀粘接系统形成的混合层较厚,其下方有裂隙及断裂的树脂突出现。结论自酸蚀组牙本质小管口封闭良好;全酸蚀Prime&Bond NT组,可见树脂突的断裂,牙本质小管暴露,封闭不严密。自酸蚀粘接系统在引起术后敏感方面优于全酸蚀粘接系统。Objective To study the micromorphological characteristics of dentin bonding interface in 5 different self-etching systems and a total-etching system. Methods Extracted human molars were bonded with all kinds of adhesives according to the manufacturers＇ instructions, and a thin layer of composite applied. The teeth were sectioned parallel to the bonded surface to obtain a bonded dentin disc. All the ultrastructures of dentin bonding interface were observed with SEM. Results All teeth showed hybrid layer formation. However, the thickness varied depending on the adhesive systems and the total-etching （Prime Bond NT） showed the thick hybrid layer whereas SE bonded to dentin exhibited the thinner hybrid layer. Moreover, in the teeth which were used total-etching, the composite did not penetrate to the depth of the zone of demineralized dentin, leaving a substantial area of exposed dentin matrix at the dentin/cement interface. In contrast, there was substantial composite diffusion throughout the demineralized dentin when the self-etching primer was used without acid etching pretreatment. Conclusion Good obturation appeared in self-etching groups. The resin tag was broken and the dentinal tubules were open in total-etching group, however. Postoperative sensitivity of SE is less than that of TE.

关 键 词：粘接剂 牙本质 酸蚀 术后敏感 

分 类 号：R781.05[医药卫生—口腔医学]