A major difference between total-etch and selfetching primer dentin bonding systems include all of the following except _____.
Self-etch dentin bonding systems differ from total-etch dentin bonding systems by removing less of the smear layer (they use a less potent acid), creating a weaker bond to enamel (especially nonprepared enamel), and not requiring wet bonding that may be necessary for some of the total-etch systems. Even though fewer actual materials may be needed with some of the self-etch systems, they need to be applied in multiple coats and thus the time necessary to apply the materials is similar for both systems.
The time necessary to apply the material(s).
The amount of smear layer removed.
The bond strengths to enamel.
The need for wet bonding.