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The
gray lower portion shows the unaltered dentin with the
dentinal tubules cut in cross section. The adhesive
primer resin tags appear as small reddish blue dots
in the center of the tubules.
The
hybrid layer is the blue band across the center of the
slide. This is the interlocking matrix formed by the
adhesive primer, which is stained blue, and the collagen
fibers in the demineralized dentin surface.
The cream color layer at the top is the unfilled resin
bonding agent. It has chemically reacted with the surface
of the adhesive primer, and this can be seen in the
thin light blue band at the top of the blue hybrid layer.
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