Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, Kapucijnenvoer 7, B-3000 Leuven, Belgium.
Dent Mater. 2011 Aug;27(8):818-24. doi: 10.1016/j.dental.2011.04.007. Epub 2011 May 18.
A great challenge regarding the ease-of-use of composites involves the development of 'self-adhesive' composites that no longer require a separate adhesive to bond to tooth enamel/dentin.
To characterize the interfacial ultra-structure of an experimental self-adhesive filling material bonded to enamel and dentin using transmission electron microscopy (TEM).
The experimental self-adhesive material was bonded to bur-cut human enamel and dentin, and to fractured (smear-free) dentin, strictly according to the manufacturers' instructions. The specimens were stored for 1 day in distilled water (37 °C) prior to further common specimen processing for TEM.
The experimental self-adhesive filling material revealed a typical micro-hybrid filler distribution. At bur-cut enamel, a tight interface was formed, mostly exhibiting only tiny micro-tags without distinct surface demineralization. At bur-cut dentin, the experimental self-adhesive filling material interacted superficially, with the surface structure being more irregular because of the bur preparation. No clear resin tags were formed due to the obstruction of dentin tubules with smear plugs. At fractured dentin, the formation of a relatively thin hybrid layer of maximum a few hundreds of nanometer was disclosed without clear surface demineralization. Distinct resin tags were formed due to the absence of smear plugs. Silver-nitrate infiltration showed a pattern of spot-like appearance of nano-leakage. Ag deposition was observed more along the dentin-adhesive interface of bur-cut dentin, as compared to that of fractured dentin.
The obtained tight interface at both enamel and dentin demonstrates the self-adhesive capacity of the experimental self-adhesive filling material.
关于复合材料易用性的一个巨大挑战涉及到开发“自粘”复合材料，这种复合材料不再需要单独的粘合剂来粘合牙釉质/牙本质。
使用透射电子显微镜（TEM）来描述实验性自粘填充材料与牙釉质和牙本质结合的界面超微结构。
根据制造商的说明，将实验性自粘材料粘合到切割后的人牙釉质和牙本质上，以及断裂（无划痕）的牙本质上。在进一步进行 TEM 常见样本处理之前，将样本在蒸馏水中（37°C）储存 1 天。
实验性自粘填充材料显示出典型的微混合填料分布。在切割后的牙釉质上，形成了紧密的界面，主要只显示出微小的微标签，没有明显的表面脱矿化。在切割后的牙本质上，实验性自粘填充材料表面相互作用，由于切割准备，表面结构更加不规则。由于有牙本质小管的堵塞，没有形成明显的树脂标签。在断裂的牙本质上，形成了相对较薄的混合层，最大厚度为几百纳米，没有明显的表面脱矿化。由于没有划痕塞，形成了明显的树脂标签。硝酸银渗透显示出纳米泄漏的点状外观模式。与断裂的牙本质相比，在切割后的牙本质的牙本质-粘合剂界面上观察到更多的银沉积。
在牙釉质和牙本质上获得的紧密界面证明了实验性自粘填充材料的自粘能力。
