TABLE 2. Fluid flow (in percentage) across bonded-dentin when using two-step etch-and-rinse adhesives that were applied as recommended by manufacturers (controls) or coated with an extra coat of the respective two-step etch-and-rinse adhesive or with a more hydrophobic bonding resin.

	TREATMENTS
Adhesives	Manufacturers' recommendation	Extra coat of the respective adhesive	Coat of a hydrophobic resin
SB	38 ± 14 A	45 ± 11 A	22 ± 9 B
EX	47 ± 9 A	41 ± 15 A	27 ± 10 B
PB	39 ± 13 A	38 ± 19 A	32 ± 14 B

Values (Mean ± SD) are expressed as a percentage of the maximum permeability (acid-etched dentin). Groups identified by different letters were statically different (p<0.05).