Sorensen J A, Dixit N V, White S N, Avera S P
School of Dentistry, University of California, Los Angeles 90024.
Int J Prosthodont. 1991 May-Jun;4(3):213-8.
This in vitro study measured the microleakage of current dentin bonding agents and glass-ionomer bases. Freshly extracted human molars were prepared to a flat surface, and dentin adhesives and composite resins were applied in a plastic matrix. Samples were stored in water at 37 degrees C, thermocycled, stained with AgNO3, embedded in epoxy resin, and sectioned for evaluation of stain penetration at the composite resin/tooth interface. The reliability index of the dentin adhesives varied significantly between materials. The enamel control had essentially no microleakage, and the aluminum oxalate dentin adhesive on dentin had significantly less microleakage than other dentin adhesives tested. Present dentin adhesives were unable to prevent, but may reduce, microleakage.
这项体外研究测量了当前牙本质粘结剂和玻璃离子垫底材料的微渗漏情况。将新鲜拔除的人类磨牙制备成平面，在塑料基质中应用牙本质粘结剂和复合树脂。样本在37摄氏度的水中储存，进行热循环处理，用硝酸银染色，嵌入环氧树脂中，并切片以评估复合树脂/牙齿界面处的染色渗透情况。牙本质粘结剂的可靠性指标在不同材料之间有显著差异。釉质对照基本没有微渗漏，牙本质上的草酸铝牙本质粘结剂的微渗漏明显少于所测试的其他牙本质粘结剂。目前的牙本质粘结剂无法防止，但可能减少微渗漏。
