Studies on the dentin surface treatment agent with collagen-dissolving ability

提出了一种新的表面处理方法，可以促进直接金属修复材料与牙体的结合，而不需要胶结剂。氨态硝酸银溶液的银镜像反应是利用甲醛中醛基的还原能力使经酸和次氯酸钠预处理的牙齿表面在室温和短时间内具有溶胶原的能力。在直接金属修复材料中，金属银在牙体表面形成片状，与汞和（或）镓作为液态金属发生反应，使直接金属修复材料在牙体上不需要胶结剂而被牢固地固定。通过牙表面的金属银，直接金属修复材料与牙体的界面处没有结构间隙。

New surface treatment method for promoting the bonding of direct metal restorative materials and tooth substance without cementing agent was applied. The silver mirror reaction of ammoniacal silver nitrate solution by the use of reducing power of aldehyde group in formaldehyde enabled on the tooth surface pretreated with acid and sodium hypochlorite having collagen-dissolving ability at the room temperature and short time. As the results of metaric silver, which plates out on the tooth surface, reacts with mercurry and/or gallium as a liquid metals in the direct metal restorative materials, direct metal restorative materials were fixed tightly without cementing agent on the tooth substance. Furthermore, there is no construction gap at the interface of direct metal restorative materials and tooth substance through metallic silver on the tooth surface.