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. Author manuscript; available in PMC: 2010 Jul 1.
Published in final edited form as: J Biomed Mater Res B Appl Biomater. 2009 Jul;90(1):327–337. doi: 10.1002/jbm.b.31290

Figure 6.

Figure 6

Schematic of micropermeability of resins bonded to water-saturated acid-etched dentin (A) versus ethanol-saturated acid-etched dentin (B). During the infiltration phase of dentin bonding, solvated comonomers diffuse down open tubules and into the interfibrillar spaces of superficial intertubular dentin. Deeper interfibrillar spaces seem to fill indirectly via radial diffusion through lateral branches of the tubules. Residual water in those diffusion channels may permit more water-soluble hydrophilic monomers to diffuse into these sites and exclude the more water-insoluble dimethacrylates. Residual ethanol in (B) would dissolve all comonomers and may coat the collagen fibrils with more resin.