Dentinal variations after application of an adhesive containing isopropanol used in etch and rinse mode on moist and dried dentin

The aim of this study was to compare the technique sensitivity of an adhesive system to the moisture conditions of the dentinal substrate by measuring the dentin permeability variation. Infrared spectroscopy allows analysis of dentin components and in particular the remaining dentin water, depending on application of the adhesive on dry or humid dentin. Thermal studies help determining whether the water is free or bound. Within the limitations of this study the adhesive didn’t yield unfavourable results, whether the technique was moist or overdry. The results point to the use of isopropanol as a solvent with favourable solubilities and vapour pressure compatible with adhesive resins.