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Transmission electron microscopy images of acid-etched dentin bonded with (A) solvated resin 2 to water-saturated dentin (top of hybrid layer), (B) solvated resin 2 to ethanol-saturated dentin (top of hybrid layer), (C) solvated resin 3 to water-saturated dentin (middle portion of hybrid layer), and (D) solvated resin 3 to ethanol-saturated dentin (middle portion of hybrid layer).
