Besides the possibility of different moisture degrees
remaining in the same tooth cavity after the etching/rinsing/
drying procedures, the adhesion process is also influenced
by the adhesive system’s composition, mainly the type of
solvent used. Among the most common solvents present in
dental adhesives there are water, ethanol, acetone and
tetrahydrofuran. Differently from this pattern, XP Bond®
adhesive system (Dentsply Caulk, Milford, MA, USA), which
contains tert-butanol as solvent, is a two-step etch-and-rinse
adhesive which is marketed as being a good adhesive agent
even in over-wet or dry dentin conditions.