Goracci G, Mori G, Bazzucchi M, Casa de'Martinis L
Department of Operative Dentistry, University of Rome, "La Sapienza", Italy.
Int J Prosthodont. 1995 Nov-Dec;8(6):548-56.
It is generally accepted that the application of dentin-enamel adhesive should involve not only the etched enamel but also the dentinal surface. For this purpose, new bonding agents requiring dentin etching and the combined use of bifunctional groups (Primers) as well as hydrophilic resins have been introduced. This study used scanning electron microscopy to analyze the relationship between dentin and fluid resin of three bonding agents. The results demonstrated that the adhesive monomers easily penetrated the etched dentin, sealing the dentinal tubules and creating a resin dentin interdiffusion zone (hybrid layer). As a result, the microleakage between dentin and resin composite restorations, responsible for postoperative tooth sensitivity, pulpal inflammatory reaction, and secondary decay, is greatly reduced.
人们普遍认为，牙本质-釉质黏结剂的应用不仅应涉及酸蚀后的釉质，还应包括牙本质表面。为此，已引入了需要对牙本质进行酸蚀并联合使用双官能团（底漆）以及亲水性树脂的新型黏结剂。本研究使用扫描电子显微镜分析三种黏结剂的牙本质与流体树脂之间的关系。结果表明，黏结单体易于渗透酸蚀后的牙本质，封闭牙本质小管并形成树脂-牙本质相互扩散区（混合层）。因此，牙本质与树脂复合修复体之间的微渗漏（这是导致术后牙齿敏感、牙髓炎症反应和继发龋的原因）大大减少。
