[Ultrastructural study of the effect of acid etching on different dentin adhesives]

We study the behavior of several dentinal adhesives in shielding dentine against acid insult. Durafill, Ionosit, Visiobond, Heliobond and Prismabond provide little protection against acids, leaving the dentinal tubules uncovered, more or less open. Scotchbond, which, forms a layer thicker than any of the other adhesives, endures acid engraving a little better, leaving less dentinal tubules unprotected, which are thinner than those left bare by any of the other adhesives studied here.