表面状态对乙醇-水基黏接剂强度和界面的影响  

Bonding Strength and Interface Effects of Different Dentin Bonding Surfaces on Alcohol-water-based Adhesives

作　　者：李潇[1] 施长溪[2] 赵信义[2] 牛书铭[1] 

机构地区：[1]广州军区总医院口腔科,广州510010 [2]第四军医大学口腔医学院修复科,西安710031

出　　处：《口腔医学》2004年第6期341-343,共3页Stomatology

摘　　要：目的　研究干燥或湿润的牙本质表面状态对乙醇 -水基黏接剂黏接强度与黏接界面微观结构的影响 ,探讨黏接强度与黏接界面微观结构之间的内在联系。方法　选用两种含有乙醇和水的湿黏接系统OptiBondSolo和SingleBond ,将Chrisma树脂分别黏结在干燥或湿润的人牙本质表面 ,测试各组试件的微拉伸强度 ,并在扫描电镜下观察和比较各组试件黏接界面超微结构的异同。结果　湿黏接时黏接剂对牙本质表面的渗透较为充分 ,混合层均匀 ,厚度为 4～ 5 μm ,并可观察到牙本质小管和侧支小管中均有明显的树脂突形成 ;干燥黏结时形成的界面形态与湿黏接时没有明显区别。干燥黏接时 ,两种黏接系统的微拉伸强度均降低 ,下降幅度最高为 2 3% ,微拉伸破坏的方式主要是黏接界面的破坏。Objective To study the microstructure characteristics of alcohol-water-based bonding on dry or wet dentin surface. Methods Two alcohol-water-based wet bonding systems, OptiBond Solo and Single Bond, were used to bond Chrisma B20 resin to dry or moist dentin surface. The bonding interfaces were observed with SEM HITACHI S-2700 scanning electron microscope and microtensile bonding strengths of different groups were measured with Instro 1195. Results Both bonding systems could infiltrate well into dentin bonding interface. Banded collagen and interfibrillar space could be observed at the surface of the acid-conditioned dentin. Hybrid layer formed in demineralized dentin and around the lateral branch of dentinal tubule. No major differences in ultrastructure were observed when the two adhesive systems were bonded to either dry or wet dentin. Microtensile strength had significantly decreased while bonding on dry dentin surface with alcohol-water-based wet bonding systems, with the maximum decrease of 23% in Single Bond. Most of fractures occurred at the bonding interface. Conclusion Alcohol-water-based adhesive can infiltrate well into dentin when bonded to either dry or wet dentin. Water in adhesive can re-expand the air-dried and collapsed collagen network, which can be called self-rewetting effect. Microtensile strength is close to the real dentin bonding strength.

关 键 词：黏接强度 微拉伸 黏接界面 混合层 乙醇 

分 类 号：R783.1[医药卫生—口腔医学]