Abstract
We reported previously that adhesive bond strength to dentin decreased to 6 MPa on phosphoric acid etched dentin and adhesive failure at intertubular dentin and peritubular dentin were observed. Effect of glutaraldehyde pretreatment before the etching was studied and we found that the bond strength increased to 11 MPa. The improvement suggested that the collagen crosslinked with the aldehyde possessed stronger resistance against acid. The mixed failure modes were obsrved on fracture surface of the modified dentin after the tensile adhesive test. The resin reinforced dentin which was prepared by interpenetration of monomers into the dentin and the polymerization in situ was analyzed chemically and scanning electron microscopically.
