Protection against harmful effects of a restorative procedure using an acidic cavity cleanser

The present investigation demonstrates that direct application of a composite resin on an acid-etched, vital dentin surface is hazardous to the pulp in monkey teeth. This indicates that exposed dentin should be protected before treating the tooth with a restorative technique including acid etching. A ca(OH)2-containing base material showed promising qualities as a protective liner for this kind of restorative treatment.